Question: Who is the developer of this aircraft?

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title: "Boeing 707" content: Boeing 707 The Boeing 707 is a mid-sized, long-range, narrow-body, four-engine jet airliner built by Boeing Commercial Airplanes from 1958 to 1979. Its name is commonly pronounced as "seven oh seven". Versions of the aircraft have a capacity from 140 to 219 passengers and a range of . Developed as Boeing's first jet airliner, the 707 is a swept-wing design with podded engines. Although it was not the first jetliner in service, the 707 was the first to be commercially successful. Dominating passenger air transport in the 1960s and remaining common through the 1970s, the 707 is generally credited with

title: "Boeing 707" content: ushering in the Jet Age. It established Boeing as one of the largest manufacturers of passenger aircraft, and led to the later series of airliners with "7x7" designations. The later 720, 727, 737, and 757 share elements of the 707's fuselage design. The 707 was developed from the Boeing 367-80, a prototype jet first flown in 1954. A larger fuselage cross-section and other modifications resulted in the initial-production 707-120, powered by Pratt & Whitney JT3C turbojet engines, which first flew on December 20, 1957. Pan American World Airways began regular 707 service on October 26, 1958. Later derivatives included the

title: "Boeing 707" content: shortened long-range 707-138 and the stretched 707-320, both of which entered service in 1959. A smaller short-range variant, the 720, was introduced in 1960. The 707-420, a version of the stretched 707 with Rolls-Royce Conway turbofans, debuted in 1960, while Pratt & Whitney JT3D turbofans debuted on the 707-120B and 707-320B models in 1961 and 1962, respectively. The 707 has been used on domestic, transcontinental, and transatlantic flights, and for cargo and military applications. A convertible passenger-freighter model, the 707-320C, entered service in 1963, and passenger 707s have been modified to freighter configurations. Military derivatives include the E-3 Sentry airborne

title: "Boeing 707" content: reconnaissance aircraft and the C-137 Stratoliner VIP transports. Boeing produced and delivered 1,011 airliners including the smaller 720 series; over 800 military versions were also produced. As of July 2017, there were no active 707s in commercial airline service. During and after World War II, Boeing was known for its military aircraft. The company had produced innovative and important bombers, from the B-17 Flying Fortress and B-29 Superfortress, to the jet-powered B-47 Stratojet and B-52 Stratofortress. The company's civil aviation department lagged far behind Douglas and other competitors, the only noteworthy airliners being the Boeing 314 Clipper and 307 Stratoliner.

title: "Boeing 707" content: During 1949–1950, Boeing embarked on studies for a new jet transport, realizing that any design must be aimed at both the military and civilian markets. At the time, aerial refueling was becoming a standard technique for military aircraft, with over 800 KC-97 Stratofreighters on order. With the advent of the Jet Age, a new tanker was required to meet the USAF's fleet of jet-powered bombers; this was where Boeing's new design would potentially win military orders. Boeing studied numerous wing and engine layouts for its new transport/tanker, some of which were based on the B-47 and C-97, before settling on

title: "Boeing 707" content: 367−80. The "Dash 80" took less than two years from project launch in 1952 to rollout on May 14, 1954, then first flew on July 15, 1954. It was powered by the Pratt & Whitney JT3C turbojet engine, which was the civilian version of the J57 used on many military aircraft of the day, including the F-100 Super Sabre fighter and the B-52 bomber. The prototype was a proof-of-concept aircraft for both military and civilian use. The United States Air Force was the first customer, using it as the basis for the KC-135 Stratotanker aerial refueling platform. Whether the passenger

title: "Boeing 707" content: 707 would be profitable was far from certain. At the time, Boeing was making nearly all of its money from military contracts: Its last passenger transport, the Boeing 377 Stratocruiser, had netted the company a $15 million loss before it was purchased by the Air Force as the KC-97 Stratofreighter. In a demonstration flight over Lake Washington outside Seattle, on August 7, 1955, test pilot Tex Johnston performed a barrel roll in the 367-80 prototype. The 132-inch (3.35 m) wide fuselage of the Dash 80 was large enough for four-abreast (two-plus-two) seating like the Stratocruiser. Answering customers' demands and under

title: "Boeing 707" content: Douglas competition, Boeing soon realized this would not provide a viable payload, so it widened the fuselage to to allow five-abreast seating and use of the KC-135's tooling. Douglas Aircraft had launched its DC-8 with a fuselage width of . The airlines liked the extra space and six-abreast seating, so Boeing increased the 707's width again to compete, this time to . The first flight of the first-production 707-120 took place on December 20, 1957, and FAA certification followed on September 18, 1958. Both test pilots Joseph John "Tym" Tymczyszyn and James R. Gannett were awarded the first Iven C.

title: "Boeing 707" content: Kincheloe Award for the test flights that led to certification. A number of changes were incorporated into the production models from the prototype. A Krueger flap was installed along the leading edge between the inner and outer engines on early 707-120 and −320 models. The initial standard model was the 707-120 with JT3C turbojet engines. Qantas ordered a shorter-bodied version called the 707-138, which was a −120 with six fuselage frames removed, three in front of the wings, and three aft. The frames in the 707 were each 20 in (500 mm) apart, so this resulted in a net shortening

title: "Boeing 707" content: of 10 ft (3 m) to . Because the maximum takeoff weight remained the same as that of the −120 (247,000 lb or 112 t), the −138 was able to fly the longer routes that Qantas needed. Braniff International Airways ordered the higher-thrust version with Pratt & Whitney JT4A engines, the 707-220. The final major derivative was the 707-320, which featured an extended-span wing and JT4A engines, while the 707-420 was the same as the −320, but with Conway turbofan engines. British certification requirements relating to go-arounds with one engine inoperative also forced Boeing to increase the height of the

title: "Boeing 707" content: tail fin on all 707 variants, as well as add a ventral fin, which was retrofitted on earlier −120 and −220 aircraft. These modifications also aided in the mitigation of Dutch roll by providing more stability in yaw. Though initially fitted with turbojet engines, the dominant engine for the Boeing 707 family was the Pratt & Whitney JT3D, a turbofan variant of the JT3C with lower fuel consumption and higher thrust. JT3D-engined 707s and 720s were denoted with a "B" suffix. While many 707-120Bs and -720Bs were conversions of existing JT3C-powered machines, 707-320Bs were available only as newly built aircraft,

title: "Boeing 707" content: as they had a stronger structure to support a maximum takeoff weight increased by , along with modifications to the wing. The 707-320B series enabled nonstop westbound flights from Europe to the US West Coast and from the US to Japan. The final 707 variant was the 707-320C, (C for "Convertible"), which had a large fuselage door for cargo. It had a revised wing with three-sectioned leading-edge flaps, improving takeoff and landing performance and allowing the ventral fin to be removed (although the taller fin was retained). The 707-320Bs built after 1963 used the same wing as the −320C and

title: "Boeing 707" content: were known as 707-320B Advanced aircraft. Production of the passenger 707 ended in 1978. In total, 1,010 707s were built for civilian use, though many of these found their way to military service. The 707 production line remained open for purpose-built military variants until 1991, with the last new-build 707 airframes built as E-3 and E-6 aircraft. Traces of the 707 are still found in the 737, which uses a modified version of the 707's fuselage, as well as the same external nose and cockpit configurations as those of the 707. These were also used on the previous 727, while

title: "Boeing 707" content: the 757 also used the 707 fuselage cross-section. The 707's wings are swept back at 35°, and like all swept-wing aircraft, display an undesirable "Dutch roll" flying characteristic that manifests itself as an alternating yawing and rolling motion. Boeing already had considerable experience with this on the B-47 and B-52, and had developed the yaw damper system on the B-47 that would be applied to later swept-wing configurations like the 707. However, many novice 707 pilots had no experience with this phenomenon, as they were transitioning from straight-wing propeller-driven aircraft such as the Douglas DC-7 and Lockheed Constellation. On one

title: "Boeing 707" content: customer-acceptance flight, where the yaw damper was turned off to familiarize the new pilots with flying techniques, a trainee pilot's actions violently exacerbated the Dutch roll motion and caused three of the four engines to be torn from the wings. The plane, a brand new 707-227, "N7071", destined for Braniff, crash-landed on a river bed north of Seattle at Arlington, Washington, killing four of the eight occupants. In his autobiography, test pilot Johnston describes a Dutch roll incident he experienced as a passenger on an early commercial 707 flight. As the aircraft's movements did not cease and most of the

title: "Boeing 707" content: passengers became ill, he suspected a misrigging of the directional autopilot (yaw damper). He went to the cockpit and found the crew unable to understand and resolve the situation. He introduced himself and relieved the ashen-faced captain who immediately left the cockpit feeling ill. Johnston disconnected the faulty autopilot and manually stabilized the plane "with two slight control movements". The 707 uses engine-driven turbocompressors to supply pressurized air for cabin pressurization. On many commercial 707s, the outer port (number 1) engine mount is distinctly different from the other three, as this engine is not fitted with a turbocompressor. Later-model 707s

title: "Boeing 707" content: typically had this configuration, although American Airlines had turbocompressors on engines 2 and 3 only. Early 707 models often had turbocompressor fairings on all four engines, but with only two or three compressors installed. The JT3D-3B engines are readily identifiable by the large gray secondary air inlet doors in the nose cowl. These doors are fully open (sucked in at the rear) during takeoff to provide additional air. When the engines are throttled back to cruise, the doors are shut. The 707 was the first commercial jet aircraft to be fitted with clamshell-type thrust reversers on each of the four

title: "Boeing 707" content: engines. Pratt & Whitney, in a joint venture with Seven Q Seven (SQS) and Omega Air, has selected the JT8D-219 as a re-engine powerplant for Boeing 707-based aircraft, calling their modified configuration a 707RE. Northrop Grumman has selected the −219 to re-engine the United States Air Force's fleet of 19 E-8 Joint STARS aircraft, which will allow the J-STARS more time on station due to the engine's greater fuel efficiency. NATO also plans to re-engine their fleet of E-3 Sentry AWACS aircraft. The −219 is publicized as being half the cost of the competing 707 re-engine powerplant, the CFM International

title: "Boeing 707" content: CFM56, and is 40 dB quieter than JT3D engines that are being replaced. The first commercial orders for the 707 came on October 13, 1955, when Pan Am committed to 20 707s and 25 Douglas DC-8s, dramatically increasing their passenger capacity (in available revenue passenger seat-miles per hour/per day) over its existing fleet of propeller aircraft. The competition between the 707 and Douglas DC-8 was fierce. Pan American ordered these planes, when and as they did, so that they would be the operators of the "first-off" production line for each aircraft type. Until their initial batch of the aircraft had

title: "Boeing 707" content: been delivered to them and put into operation, Pan American would have the distinction of being not only the "Launch Customer" for both transcontinental American jets, but the exclusive operator of American intercontinental jet transports for at least a year. The only rival in intercontinental jet aircraft production at the time was the British de Havilland Comet. However, this was never real competition for the American market as the Comet series had been the subject of fatal accidents (due to design flaws) early in its introduction, withdrawn from service, virtually redesigned from scratch, and reintroduced as version -4. It was

title: "Boeing 707" content: also smaller and slower than the 707. Several major airlines committed only to the (second place in the production race) Douglas DC-8. Douglas Aircraft was the more established and preferred (by airlines and their passengers) maker of passenger aircraft at the time. Douglas had correctly decided to await the validation of a larger and more fuel efficient engine (JT4A from Pratt & Whitney), and to design a larger and longer range aircraft around this engine. To stay competitive, Boeing made a late and costly decision to redesign and enlarge the 707's wing to help increase range and payload. The new

title: "Boeing 707" content: version was numbered 707-320. Pan Am was the first airline to operate the 707; the carrier inaugurated 707 service with a christening at National Airport on October 17, 1958, attended by President Eisenhower, followed by a transatlantic flight for VIPs (personal guests of founder Juan Trippe) from Baltimore's Friendship International Airport to Paris. The aircraft's first commercial flight was from Idlewild Airport, New York, to Le Bourget, Paris, on October 26, 1958, with a fuel stop in Gander, Newfoundland. In December, National Airlines operated the first U.S. domestic jet airline flights between New York/Idlewild and Miami, using 707s leased from

title: "Boeing 707" content: Pan Am; American Airlines was the first domestic airline to fly its own jets, on January 25, 1959. TWA started domestic 707-131 flights in March and Continental Airlines started 707-124 flights in June; airlines that had ordered only the DC-8, such as United, Delta, and Eastern, were left without jets until September and lost market share on transcontinental flights. Qantas was the first non-US airline to use the 707s, starting in 1959. The 707 quickly became the most popular jetliner of its time. Its popularity led to rapid developments in airport terminals, runways, airline catering, baggage handling, reservations systems, and

title: "Boeing 707" content: other air transport infrastructure. The advent of the 707 also led to the upgrading of air traffic control systems to prevent interference with military jet operations. As the 1960s drew to a close, the exponential growth in air travel led to the 707 being a victim of its own success. The 707 was now too small to handle the increased numbers of passengers on the routes for which it was designed. Stretching the fuselage was not a viable option because the installation of larger, more powerful engines would need a larger undercarriage, which was not feasible given the design's limited

title: "Boeing 707" content: ground clearance at takeoff. Boeing's answer to the problem was the first wide-body airliner—the Boeing 747. The 707's first-generation engine technology was also rapidly becoming obsolete in the areas of noise and fuel economy, especially after the 1973 oil crisis. In 1982, during the Falklands War, the Argentine Air Force extensively used 707s for long-range maritime patrol, with some of them being intercepted and shepherded away by Royal Navy Sea Harriers, it also led to the conversion of British Nimrods to carry Sidewinder air-to-air missiles after a casual encounter. Trans World Airlines flew the last scheduled 707 flight for passengers

title: "Boeing 707" content: by a US carrier on October 30, 1983, although 707s remained in scheduled service by airlines from other nations for much longer. Middle East Airlines of Lebanon flew 707s and 720s in front-line passenger service until the end of the 1990s. Since LADE of Argentina took its 707-320Bs from regular service in 2007, Saha Airlines of Iran was the last airline to keep 707s in scheduled passenger service until April 2013. Operations of the 707 were threatened by the enactment of international noise regulations in 1985. Shannon Engineering of Seattle developed a hush kit with funding from Tracor, Inc, of

title: "Boeing 707" content: Austin, Texas. By the late 1980s, 172 Boeing 707s had been equipped with the Quiet 707 package. Boeing acknowledged that more 707s were in service than before the hush kit was available. Most remaining 707s are in freighter form, or as business jets. Although certified as Series 100s, 200s, 300s, etc., the different 707 variants are more commonly known as Series 120s, 220s, 320s, and so on, where the "20" part of the designation is Boeing's "customer number" for its development aircraft. The 707-020 was the original designation for what ultimately became the Boeing 720. Launch customer United Air Lines

title: "Boeing 707" content: was a Douglas DC-8 customer and preferred not to be seen as buying the competing 707, hence the 720 designation. American Airlines always referred to its 720s as 707s. The 707-120 was the first production 707 variant, with a longer, wider fuselage, and greater wingspan than the Dash 80. The cabin had a full set of rectangular windows and could seat up to 189 passengers. It was designed for transcontinental routes, and often required a refueling stop when flying across the North Atlantic. It had four Pratt & Whitney JT3C-6 turbojets, civilian versions of the military J57, initially producing 13,000

title: "Boeing 707" content: lb (57.8 kN) with water injection. Maximum takeoff weight was 247,000 lb and first flight was on December 20, 1957. Major orders were the launch order for 20 707-121 aircraft by Pan Am and an American Airlines order for 30 707-123 aircraft. The first revenue flight was on October 26, 1958; 56 were built, plus seven short-bodied −138s; the last −120 was delivered to Western in May 1960. The 707-138 was a −120 with a fuselage 10 ft shorter than the others, with 5 ft (three frames) removed ahead and behind the wing, giving increased range. Maximum takeoff weight was

title: "Boeing 707" content: the same 247,000 lb as the standard version. It was a variant for Qantas, thus had its customer number 38. The seven −138s were delivered to Qantas June–September 1959 and first carried passengers that July. The 707-120B had Pratt & Whitney JT3D-1 turbofan engines, which were quieter, more powerful, and more fuel-efficient, producing each, with the later JT3D-3 version giving . (This thrust did not require water injection, eliminating both the system and 5000–6000 lb of water.) The −120B had the wing modifications introduced on the 720 and a longer tailplane; a total of 72 were built, 31 for American

title: "Boeing 707" content: and 41 for TWA, plus six short-bodied −138Bs for Qantas. American had its 23 surviving −123s converted to 123Bs, but TWA did not convert its 15 -131s. The only other conversions were Pan American's five surviving −121s and one surviving −139, the three aircraft delivered to the USAF as −153s and the seven short-bodied Qantas −138s. The first flight of the −120B was on June 22, 1960, and American carried the first passengers in March 1961; the last delivery was to American in April 1969. Maximum weight was 258,000 lb (117,025 kg) for both the long- and short-bodied versions. The

title: "Boeing 707" content: 707-220 was designed for hot and high operations with more powerful 15,800 lb (70.3 kN) Pratt & Whitney JT4A-3 turbojets. Five of these were produced, but only four were ultimately delivered, with one being lost during a test flight. All were for Braniff International Airways and carried the model number 707-227; the first entered service in December 1959. This version was made obsolete by the arrival of the turbofan-powered 707-120B. The 707-320 Intercontinental is a stretched version of the turbojet-powered 707-120, initially powered by JT4A-3 or JT4A-5 turbojets producing 15,800 lb (70.3 kN) each (most eventually got 17,500 lb (78.4

title: "Boeing 707" content: kN) JT4A-11s). The interior allowed up to 189 passengers, the same as the -120 and -220 series, but improved two-class capacity due to an 80-in fuselage stretch ahead of the wing (from to ), with extensions to the fin and horizontal stabilizer extending the aircraft's length further. The longer wing carried more fuel, increasing range by and allowing the aircraft to operate as true transoceanic aircraft. The wing modifications included outboard and inboard inserts, as well as a kink in the trailing edge to add area inboard. Takeoff weight was increased to initially and to with the higher-rated JT4As and

title: "Boeing 707" content: center section tanks. Its first flight was on January 11, 1958; 69 turbojet 707-320s were delivered through January 1963, the first passengers being carried (by Pan Am) in August 1959. The 707-420 was identical to the −320, but fitted with Rolls-Royce Conway 508 (RCo.12) turbofans (or by-pass turbojets as Rolls-Royce called them) of 18,000 lb (79 kN) thrust each. The first announced customer was Lufthansa. BOAC's controversial order was announced six months later, but the British carrier got the first service-ready aircraft off the production line. The British Air Registration Board refused to give the aircraft a certificate of airworthiness,

title: "Boeing 707" content: citing insufficient lateral control, excessive rudder forces, and the ability to over-rotate on takeoff, stalling the wing on the ground (a fault of the de Havilland Comet 1). Boeing responded by adding 40 inches to the vertical stabilizer, applying full instead of partial rudder boost, and fitting an underfin to prevent over-rotation. These modifications except to the fin under the tail became standard on all 707 variants and were retrofitted to all earlier 707s. The 37 -420s were delivered to BOAC, Lufthansa, Air-India, El Al, and Varig through November 1963; Lufthansa was the first to carry passengers, in March 1960.

title: "Boeing 707" content: The 707-320B had the application of the JT3D turbofan to the Intercontinental, but with aerodynamic refinements. The wing was modified from the −320 by adding a second inboard kink, a dog-toothed leading edge, and curved low-drag wingtips instead of the earlier blunt ones. These wingtips increased overall wingspan by 3.0 ft. Takeoff gross weight was increased to . The 175 707-320B aircraft were all new-build; no original −320 models were converted to fan engines in civilian use. First service was June 1962, with Pan Am. The 707-320B Advanced is an improved version of the −320B, adding the three-section leading-edge flaps

title: "Boeing 707" content: already seen on the −320C. These reduced takeoff and landing speeds and altered the lift distribution of the wing, allowing the ventral fin found on earlier 707s to be deleted. From 1965, -320Bs had the uprated −320C undercarriage allowing the same MTOW. These were often identified as 707-320BA-H. The 707-320C has a convertible passenger–freight configuration, which became the most widely produced variant of the 707. The 707-320C added a strengthened floor and a new cargo door to the −320B model. The wing was fitted with three-section leading-edge flaps which allowed the deletion of the underfin. Three hundred and thirty-five of

title: "Boeing 707" content: these variants were built, including a small number with JT3D-7 engines (19,000 lb or 84.6 kN takeoff thrust) and a takeoff gross weight of . Ironically, most −320Cs were delivered as passenger aircraft, airlines hoping that the cargo door would increase second-hand values. The addition of two additional emergency exits, one on either side aft of the wing raised the maximum passenger capacity to a theoretical 219. Only a few aircraft were delivered as pure freighters. One of the final orders was by the Iranian Government for 14 707-3J9C aircraft capable of VIP transportation, communication, and in-flight refuelling tasks. The

title: "Boeing 707" content: 707-700 was a test aircraft used to study the feasibility of using CFM International CFM56 engines on a 707 airframe and possibly retrofitting existing aircraft with the engine. After testing in 1979, "N707QT", the last commercial 707 airframe, was restored to 707-320C configuration and delivered to the Moroccan Air Force as a tanker aircraft via a "civilian" order. Boeing abandoned the retrofit program, since it felt it would be a threat to the Boeing 757 program. The information gathered from testing led to the eventual retrofitting of CFM56 engines to the USAF C-135/KC-135R models, and some military versions of the

title: "Boeing 707" content: 707 also used the CFM56. The Douglas DC-8 "Super 70" series with CFM56 engines was developed and extended the DC-8's life in a stricter noise regulatory environment. So, more DC-8s than 707s are in service now. The 707-620 was a proposed domestic range-stretched variant of the 707-320B. The 707-620 was to carry around 200 passengers while retaining several aspects of the 707-320B. It would have been delivered around 1968 and would have also been Boeing's answer to the stretched Douglas DC-8 Series 60. Had the 707-620 been built, it would have cost around US$8,000,000. However, engineers discovered that a longer

title: "Boeing 707" content: fuselage and wing meant a painstaking redesign of the wing and landing-gear structures. Rather than spend money on upgrading the 707, engineer Joe Sutter stated the company "decided spending money on the 707 wasn't worth it". The project was cancelled in 1966 in favor of the newer Boeing 747. The 707-820 was a proposed intercontinental stretched variant of the 707-320B. It was to be powered by four Pratt & Whitney JT3D-15 turbofan engines and would have had a extension in wingspan. Two variations were proposed, the 707-820(505) model and the 707-820(506) model. The 505 model would have had a fuselage

title: "Boeing 707" content: longer than the 707-320B and would have carried 209 passengers in mixed-class configuration and 260 passengers in all-economy configuration. The 506 model would have had a fuselage longer than the 707-320B and would have carried 225 passengers in mixed class configuration and 279 passengers in all economy configuration. Like the 707-620, the 707-820 was also set to compete with the stretched DC-8s. The design was being pitched to American, TWA, BOAC, and Pan Am at the time of its proposal in early 1965. The 707-820 would have cost US$10,000,000. Like the 707-620, the 707-820 would have required a massive structural

title: "Boeing 707" content: redesign to the wing and gear structures. The 707-820 was also cancelled in 1966 in favor of the 747. The militaries of the US and other countries have used the civilian 707 aircraft in a variety of roles, and under different designations. (The 707 and U.S. Air Force's KC-135 were developed in parallel from the Boeing 367–80 prototype.) The Boeing E-3 Sentry is a US military airborne warning and control system (AWACS) aircraft based on the Boeing 707 that provides all-weather surveillance, command, control, and communications. The VC-137C variant of the Stratoliner was a special-purpose design meant to serve as

title: "Boeing 707" content: Air Force One, the secure transport for the President of the United States. These models were in operational use from 1962 to 1990. The two aircraft remain on display: SAM 26000 is at the National Museum of the United States Air Force near Dayton, Ohio and SAM 27000 is at the Ronald Reagan Presidential Library in Simi Valley, California. The Canadian Forces also operated the Boeing 707 with the designation CC-137 Husky (707-347C) from 1971 to 1997. Boeing 717 was the company designation for C-135 Stratolifter and KC-135 Stratotanker derivatives of the 367-80. The designation was later reused in renaming

title: "Boeing 707" content: the McDonnell Douglas MD-95 to Boeing 717 after the company was merged with Boeing. Boeing's customer codes used to identify specific options and livery specified by customers was started with the 707, and has been maintained through all Boeing's models. In essence the same system as used on the earlier Boeing 377, the code consisted of two digits affixed to the model number to identify the specific aircraft version. For example, Pan American World Airways was assigned code "21". Thus, a 707-320B sold to Pan Am had the model number 707-321B. The number remained constant as further aircraft were purchased;

title: "Boeing 707" content: thus, when Pan American purchased the 747-100, it had the model number 747-121. In the 1980s, the USAF acquired around 250 used 707s to provide replacement turbofan engines for the KC-135E Stratotanker program. The 707 is no longer operated by major airlines. American actor John Travolta owned an ex-Qantas 707-138B, with the registration "N707JT." In May 2017, he donated the plane to the Historical Aircraft Restoration Society near Wollongong, Australia. The plane will be flown to Illawarra Regional Airport, where HARS is based, once repairs to ensure safe flying condition have been completed. Boeing As of September 2015, the 707

title: "Boeing 707" content: has been in a total of 246 major aviation occurrences and, 172 hull-loss occurrences with 3,022 fatalities. Boeing 707 The Boeing 707 is a mid-sized, long-range, narrow-body, four-engine jet airliner built by Boeing Commercial Airplanes from 1958 to 1979. Its name is commonly pronounced as "seven oh seven". Versions of the aircraft have a capacity from 140 to 219 passengers and a range of . Developed as Boeing's first jet airliner, the 707 is a swept-wing design with podded engines. Although it was not the first jetliner in service, the 707 was the first to be commercially successful. Dominating passenger

Answer: Boeing

Answer: United Aircraft and Transport Corp

Answer: The Boeing Company

Answer: Boeing

Answer: Boeing Company


Question: Who is the developer of this aircraft?

Instruction: Retrieve documents that provide an answer to the question alongside the image:

title: "Boeing 707" content: Boeing 707 The Boeing 707 is a mid-sized, long-range, narrow-body, four-engine jet airliner built by Boeing Commercial Airplanes from 1958 to 1979. Its name is commonly pronounced as "seven oh seven". Versions of the aircraft have a capacity from 140 to 219 passengers and a range of . Developed as Boeing's first jet airliner, the 707 is a swept-wing design with podded engines. Although it was not the first jetliner in service, the 707 was the first to be commercially successful. Dominating passenger air transport in the 1960s and remaining common through the 1970s, the 707 is generally credited with

title: "Boeing 707" content: ushering in the Jet Age. It established Boeing as one of the largest manufacturers of passenger aircraft, and led to the later series of airliners with "7x7" designations. The later 720, 727, 737, and 757 share elements of the 707's fuselage design. The 707 was developed from the Boeing 367-80, a prototype jet first flown in 1954. A larger fuselage cross-section and other modifications resulted in the initial-production 707-120, powered by Pratt & Whitney JT3C turbojet engines, which first flew on December 20, 1957. Pan American World Airways began regular 707 service on October 26, 1958. Later derivatives included the

title: "Boeing 707" content: shortened long-range 707-138 and the stretched 707-320, both of which entered service in 1959. A smaller short-range variant, the 720, was introduced in 1960. The 707-420, a version of the stretched 707 with Rolls-Royce Conway turbofans, debuted in 1960, while Pratt & Whitney JT3D turbofans debuted on the 707-120B and 707-320B models in 1961 and 1962, respectively. The 707 has been used on domestic, transcontinental, and transatlantic flights, and for cargo and military applications. A convertible passenger-freighter model, the 707-320C, entered service in 1963, and passenger 707s have been modified to freighter configurations. Military derivatives include the E-3 Sentry airborne

title: "Boeing 707" content: reconnaissance aircraft and the C-137 Stratoliner VIP transports. Boeing produced and delivered 1,011 airliners including the smaller 720 series; over 800 military versions were also produced. As of July 2017, there were no active 707s in commercial airline service. During and after World War II, Boeing was known for its military aircraft. The company had produced innovative and important bombers, from the B-17 Flying Fortress and B-29 Superfortress, to the jet-powered B-47 Stratojet and B-52 Stratofortress. The company's civil aviation department lagged far behind Douglas and other competitors, the only noteworthy airliners being the Boeing 314 Clipper and 307 Stratoliner.

title: "Boeing 707" content: During 1949–1950, Boeing embarked on studies for a new jet transport, realizing that any design must be aimed at both the military and civilian markets. At the time, aerial refueling was becoming a standard technique for military aircraft, with over 800 KC-97 Stratofreighters on order. With the advent of the Jet Age, a new tanker was required to meet the USAF's fleet of jet-powered bombers; this was where Boeing's new design would potentially win military orders. Boeing studied numerous wing and engine layouts for its new transport/tanker, some of which were based on the B-47 and C-97, before settling on

title: "Boeing 707" content: 367−80. The "Dash 80" took less than two years from project launch in 1952 to rollout on May 14, 1954, then first flew on July 15, 1954. It was powered by the Pratt & Whitney JT3C turbojet engine, which was the civilian version of the J57 used on many military aircraft of the day, including the F-100 Super Sabre fighter and the B-52 bomber. The prototype was a proof-of-concept aircraft for both military and civilian use. The United States Air Force was the first customer, using it as the basis for the KC-135 Stratotanker aerial refueling platform. Whether the passenger

title: "Boeing 707" content: 707 would be profitable was far from certain. At the time, Boeing was making nearly all of its money from military contracts: Its last passenger transport, the Boeing 377 Stratocruiser, had netted the company a $15 million loss before it was purchased by the Air Force as the KC-97 Stratofreighter. In a demonstration flight over Lake Washington outside Seattle, on August 7, 1955, test pilot Tex Johnston performed a barrel roll in the 367-80 prototype. The 132-inch (3.35 m) wide fuselage of the Dash 80 was large enough for four-abreast (two-plus-two) seating like the Stratocruiser. Answering customers' demands and under

title: "Boeing 707" content: Douglas competition, Boeing soon realized this would not provide a viable payload, so it widened the fuselage to to allow five-abreast seating and use of the KC-135's tooling. Douglas Aircraft had launched its DC-8 with a fuselage width of . The airlines liked the extra space and six-abreast seating, so Boeing increased the 707's width again to compete, this time to . The first flight of the first-production 707-120 took place on December 20, 1957, and FAA certification followed on September 18, 1958. Both test pilots Joseph John "Tym" Tymczyszyn and James R. Gannett were awarded the first Iven C.

title: "Boeing 707" content: Kincheloe Award for the test flights that led to certification. A number of changes were incorporated into the production models from the prototype. A Krueger flap was installed along the leading edge between the inner and outer engines on early 707-120 and −320 models. The initial standard model was the 707-120 with JT3C turbojet engines. Qantas ordered a shorter-bodied version called the 707-138, which was a −120 with six fuselage frames removed, three in front of the wings, and three aft. The frames in the 707 were each 20 in (500 mm) apart, so this resulted in a net shortening

title: "Boeing 707" content: of 10 ft (3 m) to . Because the maximum takeoff weight remained the same as that of the −120 (247,000 lb or 112 t), the −138 was able to fly the longer routes that Qantas needed. Braniff International Airways ordered the higher-thrust version with Pratt & Whitney JT4A engines, the 707-220. The final major derivative was the 707-320, which featured an extended-span wing and JT4A engines, while the 707-420 was the same as the −320, but with Conway turbofan engines. British certification requirements relating to go-arounds with one engine inoperative also forced Boeing to increase the height of the

title: "Boeing 707" content: tail fin on all 707 variants, as well as add a ventral fin, which was retrofitted on earlier −120 and −220 aircraft. These modifications also aided in the mitigation of Dutch roll by providing more stability in yaw. Though initially fitted with turbojet engines, the dominant engine for the Boeing 707 family was the Pratt & Whitney JT3D, a turbofan variant of the JT3C with lower fuel consumption and higher thrust. JT3D-engined 707s and 720s were denoted with a "B" suffix. While many 707-120Bs and -720Bs were conversions of existing JT3C-powered machines, 707-320Bs were available only as newly built aircraft,

title: "Boeing 707" content: as they had a stronger structure to support a maximum takeoff weight increased by , along with modifications to the wing. The 707-320B series enabled nonstop westbound flights from Europe to the US West Coast and from the US to Japan. The final 707 variant was the 707-320C, (C for "Convertible"), which had a large fuselage door for cargo. It had a revised wing with three-sectioned leading-edge flaps, improving takeoff and landing performance and allowing the ventral fin to be removed (although the taller fin was retained). The 707-320Bs built after 1963 used the same wing as the −320C and

title: "Boeing 707" content: were known as 707-320B Advanced aircraft. Production of the passenger 707 ended in 1978. In total, 1,010 707s were built for civilian use, though many of these found their way to military service. The 707 production line remained open for purpose-built military variants until 1991, with the last new-build 707 airframes built as E-3 and E-6 aircraft. Traces of the 707 are still found in the 737, which uses a modified version of the 707's fuselage, as well as the same external nose and cockpit configurations as those of the 707. These were also used on the previous 727, while

title: "Boeing 707" content: the 757 also used the 707 fuselage cross-section. The 707's wings are swept back at 35°, and like all swept-wing aircraft, display an undesirable "Dutch roll" flying characteristic that manifests itself as an alternating yawing and rolling motion. Boeing already had considerable experience with this on the B-47 and B-52, and had developed the yaw damper system on the B-47 that would be applied to later swept-wing configurations like the 707. However, many novice 707 pilots had no experience with this phenomenon, as they were transitioning from straight-wing propeller-driven aircraft such as the Douglas DC-7 and Lockheed Constellation. On one

title: "Boeing 707" content: customer-acceptance flight, where the yaw damper was turned off to familiarize the new pilots with flying techniques, a trainee pilot's actions violently exacerbated the Dutch roll motion and caused three of the four engines to be torn from the wings. The plane, a brand new 707-227, "N7071", destined for Braniff, crash-landed on a river bed north of Seattle at Arlington, Washington, killing four of the eight occupants. In his autobiography, test pilot Johnston describes a Dutch roll incident he experienced as a passenger on an early commercial 707 flight. As the aircraft's movements did not cease and most of the

title: "Boeing 707" content: passengers became ill, he suspected a misrigging of the directional autopilot (yaw damper). He went to the cockpit and found the crew unable to understand and resolve the situation. He introduced himself and relieved the ashen-faced captain who immediately left the cockpit feeling ill. Johnston disconnected the faulty autopilot and manually stabilized the plane "with two slight control movements". The 707 uses engine-driven turbocompressors to supply pressurized air for cabin pressurization. On many commercial 707s, the outer port (number 1) engine mount is distinctly different from the other three, as this engine is not fitted with a turbocompressor. Later-model 707s

title: "Boeing 707" content: typically had this configuration, although American Airlines had turbocompressors on engines 2 and 3 only. Early 707 models often had turbocompressor fairings on all four engines, but with only two or three compressors installed. The JT3D-3B engines are readily identifiable by the large gray secondary air inlet doors in the nose cowl. These doors are fully open (sucked in at the rear) during takeoff to provide additional air. When the engines are throttled back to cruise, the doors are shut. The 707 was the first commercial jet aircraft to be fitted with clamshell-type thrust reversers on each of the four

title: "Boeing 707" content: engines. Pratt & Whitney, in a joint venture with Seven Q Seven (SQS) and Omega Air, has selected the JT8D-219 as a re-engine powerplant for Boeing 707-based aircraft, calling their modified configuration a 707RE. Northrop Grumman has selected the −219 to re-engine the United States Air Force's fleet of 19 E-8 Joint STARS aircraft, which will allow the J-STARS more time on station due to the engine's greater fuel efficiency. NATO also plans to re-engine their fleet of E-3 Sentry AWACS aircraft. The −219 is publicized as being half the cost of the competing 707 re-engine powerplant, the CFM International

title: "Boeing 707" content: CFM56, and is 40 dB quieter than JT3D engines that are being replaced. The first commercial orders for the 707 came on October 13, 1955, when Pan Am committed to 20 707s and 25 Douglas DC-8s, dramatically increasing their passenger capacity (in available revenue passenger seat-miles per hour/per day) over its existing fleet of propeller aircraft. The competition between the 707 and Douglas DC-8 was fierce. Pan American ordered these planes, when and as they did, so that they would be the operators of the "first-off" production line for each aircraft type. Until their initial batch of the aircraft had

title: "Boeing 707" content: been delivered to them and put into operation, Pan American would have the distinction of being not only the "Launch Customer" for both transcontinental American jets, but the exclusive operator of American intercontinental jet transports for at least a year. The only rival in intercontinental jet aircraft production at the time was the British de Havilland Comet. However, this was never real competition for the American market as the Comet series had been the subject of fatal accidents (due to design flaws) early in its introduction, withdrawn from service, virtually redesigned from scratch, and reintroduced as version -4. It was

title: "Boeing 707" content: also smaller and slower than the 707. Several major airlines committed only to the (second place in the production race) Douglas DC-8. Douglas Aircraft was the more established and preferred (by airlines and their passengers) maker of passenger aircraft at the time. Douglas had correctly decided to await the validation of a larger and more fuel efficient engine (JT4A from Pratt & Whitney), and to design a larger and longer range aircraft around this engine. To stay competitive, Boeing made a late and costly decision to redesign and enlarge the 707's wing to help increase range and payload. The new

title: "Boeing 707" content: version was numbered 707-320. Pan Am was the first airline to operate the 707; the carrier inaugurated 707 service with a christening at National Airport on October 17, 1958, attended by President Eisenhower, followed by a transatlantic flight for VIPs (personal guests of founder Juan Trippe) from Baltimore's Friendship International Airport to Paris. The aircraft's first commercial flight was from Idlewild Airport, New York, to Le Bourget, Paris, on October 26, 1958, with a fuel stop in Gander, Newfoundland. In December, National Airlines operated the first U.S. domestic jet airline flights between New York/Idlewild and Miami, using 707s leased from

title: "Boeing 707" content: Pan Am; American Airlines was the first domestic airline to fly its own jets, on January 25, 1959. TWA started domestic 707-131 flights in March and Continental Airlines started 707-124 flights in June; airlines that had ordered only the DC-8, such as United, Delta, and Eastern, were left without jets until September and lost market share on transcontinental flights. Qantas was the first non-US airline to use the 707s, starting in 1959. The 707 quickly became the most popular jetliner of its time. Its popularity led to rapid developments in airport terminals, runways, airline catering, baggage handling, reservations systems, and

title: "Boeing 707" content: other air transport infrastructure. The advent of the 707 also led to the upgrading of air traffic control systems to prevent interference with military jet operations. As the 1960s drew to a close, the exponential growth in air travel led to the 707 being a victim of its own success. The 707 was now too small to handle the increased numbers of passengers on the routes for which it was designed. Stretching the fuselage was not a viable option because the installation of larger, more powerful engines would need a larger undercarriage, which was not feasible given the design's limited

title: "Boeing 707" content: ground clearance at takeoff. Boeing's answer to the problem was the first wide-body airliner—the Boeing 747. The 707's first-generation engine technology was also rapidly becoming obsolete in the areas of noise and fuel economy, especially after the 1973 oil crisis. In 1982, during the Falklands War, the Argentine Air Force extensively used 707s for long-range maritime patrol, with some of them being intercepted and shepherded away by Royal Navy Sea Harriers, it also led to the conversion of British Nimrods to carry Sidewinder air-to-air missiles after a casual encounter. Trans World Airlines flew the last scheduled 707 flight for passengers

title: "Boeing 707" content: by a US carrier on October 30, 1983, although 707s remained in scheduled service by airlines from other nations for much longer. Middle East Airlines of Lebanon flew 707s and 720s in front-line passenger service until the end of the 1990s. Since LADE of Argentina took its 707-320Bs from regular service in 2007, Saha Airlines of Iran was the last airline to keep 707s in scheduled passenger service until April 2013. Operations of the 707 were threatened by the enactment of international noise regulations in 1985. Shannon Engineering of Seattle developed a hush kit with funding from Tracor, Inc, of

title: "Boeing 707" content: Austin, Texas. By the late 1980s, 172 Boeing 707s had been equipped with the Quiet 707 package. Boeing acknowledged that more 707s were in service than before the hush kit was available. Most remaining 707s are in freighter form, or as business jets. Although certified as Series 100s, 200s, 300s, etc., the different 707 variants are more commonly known as Series 120s, 220s, 320s, and so on, where the "20" part of the designation is Boeing's "customer number" for its development aircraft. The 707-020 was the original designation for what ultimately became the Boeing 720. Launch customer United Air Lines

title: "Boeing 707" content: was a Douglas DC-8 customer and preferred not to be seen as buying the competing 707, hence the 720 designation. American Airlines always referred to its 720s as 707s. The 707-120 was the first production 707 variant, with a longer, wider fuselage, and greater wingspan than the Dash 80. The cabin had a full set of rectangular windows and could seat up to 189 passengers. It was designed for transcontinental routes, and often required a refueling stop when flying across the North Atlantic. It had four Pratt & Whitney JT3C-6 turbojets, civilian versions of the military J57, initially producing 13,000

title: "Boeing 707" content: lb (57.8 kN) with water injection. Maximum takeoff weight was 247,000 lb and first flight was on December 20, 1957. Major orders were the launch order for 20 707-121 aircraft by Pan Am and an American Airlines order for 30 707-123 aircraft. The first revenue flight was on October 26, 1958; 56 were built, plus seven short-bodied −138s; the last −120 was delivered to Western in May 1960. The 707-138 was a −120 with a fuselage 10 ft shorter than the others, with 5 ft (three frames) removed ahead and behind the wing, giving increased range. Maximum takeoff weight was

title: "Boeing 707" content: the same 247,000 lb as the standard version. It was a variant for Qantas, thus had its customer number 38. The seven −138s were delivered to Qantas June–September 1959 and first carried passengers that July. The 707-120B had Pratt & Whitney JT3D-1 turbofan engines, which were quieter, more powerful, and more fuel-efficient, producing each, with the later JT3D-3 version giving . (This thrust did not require water injection, eliminating both the system and 5000–6000 lb of water.) The −120B had the wing modifications introduced on the 720 and a longer tailplane; a total of 72 were built, 31 for American

title: "Boeing 707" content: and 41 for TWA, plus six short-bodied −138Bs for Qantas. American had its 23 surviving −123s converted to 123Bs, but TWA did not convert its 15 -131s. The only other conversions were Pan American's five surviving −121s and one surviving −139, the three aircraft delivered to the USAF as −153s and the seven short-bodied Qantas −138s. The first flight of the −120B was on June 22, 1960, and American carried the first passengers in March 1961; the last delivery was to American in April 1969. Maximum weight was 258,000 lb (117,025 kg) for both the long- and short-bodied versions. The

title: "Boeing 707" content: 707-220 was designed for hot and high operations with more powerful 15,800 lb (70.3 kN) Pratt & Whitney JT4A-3 turbojets. Five of these were produced, but only four were ultimately delivered, with one being lost during a test flight. All were for Braniff International Airways and carried the model number 707-227; the first entered service in December 1959. This version was made obsolete by the arrival of the turbofan-powered 707-120B. The 707-320 Intercontinental is a stretched version of the turbojet-powered 707-120, initially powered by JT4A-3 or JT4A-5 turbojets producing 15,800 lb (70.3 kN) each (most eventually got 17,500 lb (78.4

title: "Boeing 707" content: kN) JT4A-11s). The interior allowed up to 189 passengers, the same as the -120 and -220 series, but improved two-class capacity due to an 80-in fuselage stretch ahead of the wing (from to ), with extensions to the fin and horizontal stabilizer extending the aircraft's length further. The longer wing carried more fuel, increasing range by and allowing the aircraft to operate as true transoceanic aircraft. The wing modifications included outboard and inboard inserts, as well as a kink in the trailing edge to add area inboard. Takeoff weight was increased to initially and to with the higher-rated JT4As and

title: "Boeing 707" content: center section tanks. Its first flight was on January 11, 1958; 69 turbojet 707-320s were delivered through January 1963, the first passengers being carried (by Pan Am) in August 1959. The 707-420 was identical to the −320, but fitted with Rolls-Royce Conway 508 (RCo.12) turbofans (or by-pass turbojets as Rolls-Royce called them) of 18,000 lb (79 kN) thrust each. The first announced customer was Lufthansa. BOAC's controversial order was announced six months later, but the British carrier got the first service-ready aircraft off the production line. The British Air Registration Board refused to give the aircraft a certificate of airworthiness,

title: "Boeing 707" content: citing insufficient lateral control, excessive rudder forces, and the ability to over-rotate on takeoff, stalling the wing on the ground (a fault of the de Havilland Comet 1). Boeing responded by adding 40 inches to the vertical stabilizer, applying full instead of partial rudder boost, and fitting an underfin to prevent over-rotation. These modifications except to the fin under the tail became standard on all 707 variants and were retrofitted to all earlier 707s. The 37 -420s were delivered to BOAC, Lufthansa, Air-India, El Al, and Varig through November 1963; Lufthansa was the first to carry passengers, in March 1960.

title: "Boeing 707" content: The 707-320B had the application of the JT3D turbofan to the Intercontinental, but with aerodynamic refinements. The wing was modified from the −320 by adding a second inboard kink, a dog-toothed leading edge, and curved low-drag wingtips instead of the earlier blunt ones. These wingtips increased overall wingspan by 3.0 ft. Takeoff gross weight was increased to . The 175 707-320B aircraft were all new-build; no original −320 models were converted to fan engines in civilian use. First service was June 1962, with Pan Am. The 707-320B Advanced is an improved version of the −320B, adding the three-section leading-edge flaps

title: "Boeing 707" content: already seen on the −320C. These reduced takeoff and landing speeds and altered the lift distribution of the wing, allowing the ventral fin found on earlier 707s to be deleted. From 1965, -320Bs had the uprated −320C undercarriage allowing the same MTOW. These were often identified as 707-320BA-H. The 707-320C has a convertible passenger–freight configuration, which became the most widely produced variant of the 707. The 707-320C added a strengthened floor and a new cargo door to the −320B model. The wing was fitted with three-section leading-edge flaps which allowed the deletion of the underfin. Three hundred and thirty-five of

title: "Boeing 707" content: these variants were built, including a small number with JT3D-7 engines (19,000 lb or 84.6 kN takeoff thrust) and a takeoff gross weight of . Ironically, most −320Cs were delivered as passenger aircraft, airlines hoping that the cargo door would increase second-hand values. The addition of two additional emergency exits, one on either side aft of the wing raised the maximum passenger capacity to a theoretical 219. Only a few aircraft were delivered as pure freighters. One of the final orders was by the Iranian Government for 14 707-3J9C aircraft capable of VIP transportation, communication, and in-flight refuelling tasks. The

title: "Boeing 707" content: 707-700 was a test aircraft used to study the feasibility of using CFM International CFM56 engines on a 707 airframe and possibly retrofitting existing aircraft with the engine. After testing in 1979, "N707QT", the last commercial 707 airframe, was restored to 707-320C configuration and delivered to the Moroccan Air Force as a tanker aircraft via a "civilian" order. Boeing abandoned the retrofit program, since it felt it would be a threat to the Boeing 757 program. The information gathered from testing led to the eventual retrofitting of CFM56 engines to the USAF C-135/KC-135R models, and some military versions of the

title: "Boeing 707" content: 707 also used the CFM56. The Douglas DC-8 "Super 70" series with CFM56 engines was developed and extended the DC-8's life in a stricter noise regulatory environment. So, more DC-8s than 707s are in service now. The 707-620 was a proposed domestic range-stretched variant of the 707-320B. The 707-620 was to carry around 200 passengers while retaining several aspects of the 707-320B. It would have been delivered around 1968 and would have also been Boeing's answer to the stretched Douglas DC-8 Series 60. Had the 707-620 been built, it would have cost around US$8,000,000. However, engineers discovered that a longer

title: "Boeing 707" content: fuselage and wing meant a painstaking redesign of the wing and landing-gear structures. Rather than spend money on upgrading the 707, engineer Joe Sutter stated the company "decided spending money on the 707 wasn't worth it". The project was cancelled in 1966 in favor of the newer Boeing 747. The 707-820 was a proposed intercontinental stretched variant of the 707-320B. It was to be powered by four Pratt & Whitney JT3D-15 turbofan engines and would have had a extension in wingspan. Two variations were proposed, the 707-820(505) model and the 707-820(506) model. The 505 model would have had a fuselage

title: "Boeing 707" content: longer than the 707-320B and would have carried 209 passengers in mixed-class configuration and 260 passengers in all-economy configuration. The 506 model would have had a fuselage longer than the 707-320B and would have carried 225 passengers in mixed class configuration and 279 passengers in all economy configuration. Like the 707-620, the 707-820 was also set to compete with the stretched DC-8s. The design was being pitched to American, TWA, BOAC, and Pan Am at the time of its proposal in early 1965. The 707-820 would have cost US$10,000,000. Like the 707-620, the 707-820 would have required a massive structural

title: "Boeing 707" content: redesign to the wing and gear structures. The 707-820 was also cancelled in 1966 in favor of the 747. The militaries of the US and other countries have used the civilian 707 aircraft in a variety of roles, and under different designations. (The 707 and U.S. Air Force's KC-135 were developed in parallel from the Boeing 367–80 prototype.) The Boeing E-3 Sentry is a US military airborne warning and control system (AWACS) aircraft based on the Boeing 707 that provides all-weather surveillance, command, control, and communications. The VC-137C variant of the Stratoliner was a special-purpose design meant to serve as

title: "Boeing 707" content: Air Force One, the secure transport for the President of the United States. These models were in operational use from 1962 to 1990. The two aircraft remain on display: SAM 26000 is at the National Museum of the United States Air Force near Dayton, Ohio and SAM 27000 is at the Ronald Reagan Presidential Library in Simi Valley, California. The Canadian Forces also operated the Boeing 707 with the designation CC-137 Husky (707-347C) from 1971 to 1997. Boeing 717 was the company designation for C-135 Stratolifter and KC-135 Stratotanker derivatives of the 367-80. The designation was later reused in renaming

title: "Boeing 707" content: the McDonnell Douglas MD-95 to Boeing 717 after the company was merged with Boeing. Boeing's customer codes used to identify specific options and livery specified by customers was started with the 707, and has been maintained through all Boeing's models. In essence the same system as used on the earlier Boeing 377, the code consisted of two digits affixed to the model number to identify the specific aircraft version. For example, Pan American World Airways was assigned code "21". Thus, a 707-320B sold to Pan Am had the model number 707-321B. The number remained constant as further aircraft were purchased;

title: "Boeing 707" content: thus, when Pan American purchased the 747-100, it had the model number 747-121. In the 1980s, the USAF acquired around 250 used 707s to provide replacement turbofan engines for the KC-135E Stratotanker program. The 707 is no longer operated by major airlines. American actor John Travolta owned an ex-Qantas 707-138B, with the registration "N707JT." In May 2017, he donated the plane to the Historical Aircraft Restoration Society near Wollongong, Australia. The plane will be flown to Illawarra Regional Airport, where HARS is based, once repairs to ensure safe flying condition have been completed. Boeing As of September 2015, the 707

title: "Boeing 707" content: has been in a total of 246 major aviation occurrences and, 172 hull-loss occurrences with 3,022 fatalities. Boeing 707 The Boeing 707 is a mid-sized, long-range, narrow-body, four-engine jet airliner built by Boeing Commercial Airplanes from 1958 to 1979. Its name is commonly pronounced as "seven oh seven". Versions of the aircraft have a capacity from 140 to 219 passengers and a range of . Developed as Boeing's first jet airliner, the 707 is a swept-wing design with podded engines. Although it was not the first jetliner in service, the 707 was the first to be commercially successful. Dominating passenger

Answer: Boeing

Answer: United Aircraft and Transport Corp

Answer: The Boeing Company

Answer: Boeing

Answer: Boeing Company


Question: Which company manufactures this vehicle?

Instruction: Using the provided image, obtain documents that address the subsequent question:

title: "BMW M6" content: BMW M6 The BMW M6 is a high-performance version of the 6 Series coupe/convertible, designed and developed by the motorsport division of BMW. The BMW M6 was based on the subsequent generations of the 6 series. In 1983 BMW took the M88/3 Straight-six engine, a modified version of the M88/1 from the BMW M1 and put it in the E24 chassis of the BMW 6 Series, thus creating the M635CSi (dubbed simply "M6" in North America and Japan). The first generation M6 was critically acclaimed throughout its lifespan for its elegant, aggressive "shark-nose" styling, its luxury equipment and its performance.

title: "BMW M6" content: A top speed of made the European M635CSi the second fastest BMW ever built next to the M1. However, Rug Cunningham, of Cunningham BMW, ran a bone stock 1987 U.S. M6 in the La Carrera Classic Race in Mexico in 1989 and recorded an indicated top speed of . The vehicle can be distinguished from other E24 models by "///M" badges on the front grille and rear decklid ("///M6" on the North American version), body color side-view mirrors, BBS RS wheels, rear lip spoiler, larger front air dam, larger front brakes and a 10 mm lowered ride height. The North

title: "BMW M6" content: America and Japan M6 was fitted with the catalyzed S38B35 engine, producing and of torque, whereas the European M635CSi received the non-catalyzed M88/3 engine, producing at 6500 rpm and at 4500 rpm of torque. A total of 538 catalyzed M635CSi models were sold in Europe between 1988 and 1989. The E24 series became a "world car" for the 1988 and 1989 model years, sporting the same bumpers and aerodynamic treatments across all markets. According to BMW, the car will achieve in 5.8 and 6.8 seconds for the European and North American versions respectively. However, Car and Driver Magazine tested a

title: "BMW M6" content: North American U.S. M6 in July 1987 and actually achieved a time of 6.1 seconds. Also in 1987, Road and Track touted the U.S. M6 as being one of the 10 fastest cars in America. The quarter mile time for the M635CSi has been recorded at 14.5 seconds while is achieved in 15 seconds. Production of the E24 M635CSi/M6 ended in 1989. The BMW M6 concept made its debut at the 2005 Geneva Motor Show. It was based on the BMW E63/E64 6 Series, introduced in 2004. The M6 shared the same uneven firing 5.0 L V10 S85 engine and

title: "BMW M6" content: SMG III gearbox with the E60 M5 that produces at 7,750 rpm and of torque at 6,100 rpm. Manufacturer claimed performance included a 0- acceleration time of 4.4 seconds. "Road & Track" (Feb 2006) measured the 0- acceleration time at 4.1 seconds. The top speed was limited to . De limited top speed amounted to with the optional M-driver's package. The M6 has the same 'power button' as the M5 which toggles the choice of "P400"or "P500" engine power modes. From ignition, the car delivers , but engaging the Steering wheel's M button allows the full (P500) to be engaged

title: "BMW M6" content: if it is configured so via the iDrive settings. The M6 weighs courtesy of a carbon fibre reinforced plastic roof panel as well as thermoplastic front wings, aluminium doors and bonnet and carbon fibre reinforced plastic (sheet moulding compound) boot lid. The carbon fibre and other light materials are used in places like the bumpers and roof that are far from the centre of gravity and/or high up, so that they not only reduce the overall weight but improve the handling by reducing the moment of inertia and lowering the centre of mass height. The M6 was offered as both

title: "BMW M6" content: a coupé and a cabriolet. Both the coupé and convertible could be visually distinguished from the 630i, 645Ci and 650i by their deeper front valance with air intakes, more contoured side sills, aerodynamic side view mirrors, an additional rear valance with diffuser and the absence of front fog lights. Only 701 examples were produced with a manual gearbox (323 Coupes + 378 Convertibles). In the 2010 model year, the M6 was the second-most expensive BMW sold in the U.S. after the US$137,000 760Li, with an MSRP of US$108,150 for the convertible and US$102,350 for the coupe. Production of the M6

title: "BMW M6" content: ended in mid-2010, with sales over the five-year run totalling 9,087 for the coupe and 5,056 for the convertible. Details for the new generation of the M6 were announced in February 2012, with the official reveal taking place at the Geneva Motor Show the following month. The new model is based on the BMW F12/F13 and shares its 7-speed M-DCT gearbox, BMW S63 V8 engine and other technology with the BMW M5 (F10). The M6 "coupé" has a carbon-fibre roof and other weight saving measures, making it lighter than the M5, however it is heavier than its predecessor. The M6

title: "BMW M6" content: "convertible" is heavier than the previous M6 Convertible. The official claimed performance figures state the acceleration from in 4.2 seconds and an electronically limited top speed of with the de-limited top speed being with the optional M-driver's package. The design language of the M6 was similar to the then M series cars. The front of the car has a newly designed M kidney grille with an “M6” badge – a homage to the first generation of the M6. With the 2014 Competition Package, it comes with sportier exhaust with black tips, stiffer springs, dampers, and anti-roll bars, steering is more

title: "BMW M6" content: direct than the base M6, the twin-turbocharged V8 engine utilised in the M6 is updated and produces and of torque along with a acceleration time of in 3.9 seconds (4.0 seconds for the Convertible). The BMW M6 GTLM is the racing version of the M6 created to participate in the IMSA WeatherTech SportsCar Championship and intended to replace the BMW Z4 GTE. The cars are entered by BMW Team RLL, debuting in 2016, with no wins in its debut season. The car would earn four class wins during the 2017 season before being replaced by the BMW M8 GTE for

title: "BMW M6" content: 2018. Around the start of 2015, BMW Motorsport began developing a replacement for the successful BMW Z4 GT3 which already had been in action since 2010, where they selected the M6 as the base model. Throughout the year, the factory engineered the M6 to match FIA GT3 specifications. Emphasis was placed on safety with BMW Motorsport producing an "FIA-approved safety cell in accordance with the very latest safety standards". Unlike the Z4 GT3, which used an engine derived from the BMW M3, the engine of the M6 GT3 was virtually unchanged from that of the production model of the M6

title: "BMW M6" content: (and the BMW M5). The engine only faced some modifications for use in motorsport. In May 2015, at Dingolfing, BMW works driver Jörg Müller drove the M6 GT3 on its first roll-out to contribute a milestone to its development, and later the M6 GT3 was revealed near the end of the year. The M6 GT3 showed its success on its debut year in 2016 when Rowe Racing clinched overall victory at the 2016 Spa 24 Hours with BMW works drivers Philipp Eng, Maxime Martin, and Alexander Sims at the wheel. The car also saw success in championships around the world,

title: "BMW M6" content: with wins in the VLN, Italian GT Championship, and Super GT Championship. http://www.bmw.co.za/en/index.html BMW M6 The BMW M6 is a high-performance version of the 6 Series coupe/convertible, designed and developed by the motorsport division of BMW. The BMW M6 was based on the subsequent generations of the 6 series. In 1983 BMW took the M88/3 Straight-six engine, a modified version of the M88/1 from the BMW M1 and put it in the E24 chassis of the BMW 6 Series, thus creating the M635CSi (dubbed simply "M6" in North America and Japan). The first generation M6 was critically acclaimed throughout its

Answer: BMW

Answer: Bayerische Motorenwerke

Answer: B.M.W.

Answer: BMW AG

Answer: Bavarian Motor Works

Answer: Bayerische Motoren Werke AG

Answer: BMW

Answer: Bayrische Motoren Werke


Question: What is the height of this park in terms of foot above sea level?

Instruction: Obtain documents that correspond to the inquiry alongside the provided image:

title: "National Mall" content: televised movie adaptation in which the statue appeared. In 2003, the 108th United States Congress enacted the Commemorative Works Clarification and Revision Act. This Act prohibits the siting of new commemorative works and visitor centers in a designated reserve area within the cross-axis of the Mall. In October 2013, a two-week federal government shutdown closed the National Mall and its museums and monuments. However, when a group of elderly veterans tried to enter the National World War II Memorial during the shutdown's first day, the memorial's barricades were removed. The NPS subsequently announced that the veterans had a legal right

title: "National Mall" content: to be in the memorial and would not be barred in the future. During the shutdown's second week, the NPS permitted a controversial immigration rally and concert to take place on the Mall. On October 15, 1966, the NPS listed the National Mall on the National Register of Historic Places. In 1981, the NPS prepared a National Register nomination form that documented the Mall's boundaries, features and historical significance. On December 8, 2016, the NPS listed on the National Register of Historic Places an increase in the National Mall Historic District's boundary to encompass an area bounded by 3rd Street,

title: "National Mall" content: exception of the section of land bordered by Jefferson Drive on the north, Independence Avenue on the south, and by 12th and 14th Streets respectively on the east and west, which the U.S. Department of Agriculture administers and which contains the Jamie L. Whitten Building (U.S. Department of Agriculture Administration Building). A 2012-2016 NPS National Parks index describes the National Mall as being a landscaped park that extends from the Capitol to the Washington Monument, defined as a principal axis in the L'Enfant Plan for the city of Washington. However, a 2010 NPS plan for the Mall contains maps that

title: "National Mall" content: the United States Capitol. In 2011, the 112th United States Congress enacted the Legislative Branch Appropriations Act, 2012, which transferred to the Architect of the Capitol the NPS "property which is bounded on the north by Pennsylvania Avenue Northwest, on the east by First Street Northwest and First Street Southwest, on the south by Maryland Avenue Southwest, and on the west by Third Street Southwest and Third Street Northwest". This act removed Union Square (the area containing the Ulysses S. Grant Memorial and the Capitol Reflecting Pool) from NPS jurisdiction. The National Park Service states that the purposes of the

title: "National Mall" content: with which an organizer of the event, Nation of Islam leader Louis Farrakhan, disagreed. The next year, a committee of the 104th United States Congress provided no funds for NPS crowd-counting activities in Washington, D.C. when it prepared legislation making 1997 appropriations for the U.S. Department of the Interior. As a result, the NPS has not provided any official crowd size estimates for Mall events since 1995. The absence of such an official estimate fueled a political controversy following the presidential inauguration of Donald Trump in 2017 (see: Inauguration of Donald Trump crowd size). On April 25, 2004, the March

title: "National Mall" content: for Women's Lives filled the Mall. On January 27, 2007, tens of thousands of protesters opposed to the Iraq War converged on the Mall (see: January 27, 2007 anti-war protest), drawing comparisons by participants to the Vietnam War protest. On June 12, 2018, the National Hockey League's Washington Capitals staged a rally on the Mall after parading through the city to celebrate the franchise's first Stanley Cup championship victory. Tens of thousands of fans reportedly joined the beer-soaked event. During presidential inaugurations, people without official tickets gather at the National Mall. Normally, the Mall between 7th and 14th Streets NW

title: "National Mall" content: is used as a staging ground for the parade. On December 4, 2008, the Presidential Inaugural Committee (see: United States presidential inauguration organizers) announced, "for the first time, the entire length of the National Mall will be opened to the public so that more people than ever before will be able to witness the swearing-in of the President from a vantage point in sight of the Capitol." The Committee made this arrangement because of the massive attendance – projected to be as many as 2 million people – that it expected for the first inauguration of Barack Obama on January

title: "National Mall" content: 20, 2009. Despite the arrangement, a throng of people seeking access to the event climbed and then removed temporary protective fences around the Smithsonian's Mary Livingston Ripley Garden, six blocks from the site at which Obama took his inaugural oath. Hordes then trampled the garden's vegetation and elevated plant beds when entering and leaving the event. Others could not find a way to enter the Mall in time to view the ceremony. More than a thousand people with tickets missed the event while being stranded in the I-395 Third Street Tunnel beneath the Mall after police directed them there (see

title: "National Mall" content: near Baltimore, Maryland, in 1947. It was moved to the Mall in 1981. A number of large free events recur annually on the Mall. A kite festival, formerly named the "Smithsonian Kite Festival" and now named the "Blossom Kite Festival", usually takes place each year on the Washington Monument grounds during the last weekend of March as part of the National Cherry Blossom Festival. The 2018 kite festival took place on the Washington Monument grounds on Saturday, March 31. An Earth Day celebration often takes place on the Mall around April 22. A week-long series of rallies, exhibits, observances and

title: "National Mall" content: performances occurred on the Mall from April 17 to April 25, 2010 to commemorate Earth Day's 40th anniversary. The final day's events featured performances by Sting, Mavis Staples, The Roots, John Legend and others. The 2012 Earth Day rally, which featured music, entertainment, celebrity speakers and environmental activities, took place on the Mall during a rainy day on Sunday, April 22. Cheap Trick, Dave Mason, Kicking Daisies, Sting, John Legend, Joss Stone, The Roots, Mavis Staples, Jimmy Cliff, Bob Weir and The Explorers Club performed and Congressmen John Dingell and Edward Markey spoke. In 2013, an "Earth Month" at Washington's

title: "National Mall" content: Union Station replaced the Mall's Earth Day event. On April 19, 2015, a "Global Citizen" Earth Day concert featured performances on the Washington Monument grounds by Usher, My Morning Jacket, Mary J. Blige, Train and No Doubt. The National Symphony Orchestra presents each year its "National Memorial Day Concert" on the west lawn of the United States Capitol during the evening of the Sunday before Memorial Day (the last Monday of May). The National Gallery of Art hosts a "Jazz in the Garden" series each year in the museum's Sculpture Garden on Friday evenings from late May through August. Components

title: "National Mall" content: I like their music". On July 3, 1983, thousands attended a heavily policed "Rock Against Reagan" concert that the hardcore punk rock band, Dead Kennedys, performed on the Mall in response to Watt's action. When Newton entered an Independence Day stage on the Mall on July 4, members of his audience booed. Watt apologized to The Beach Boys, First Lady Nancy Reagan apologized for Watt, and in 1984 The Beach Boys gave an Independence Day concert on the Mall to an audience of 750,000 people. On September 4, 2003, Britney Spears, Mary J. Blige, Aretha Franklin, Aerosmith and others performed

title: "National Mall" content: in a nationally televised "NFL Kickoff Live from the National Mall Presented by Pepsi Vanilla" (see: Pre-game concerts for National Football League kickoff game). Preceded by a three-day National Football League "interactive Super Bowl theme park", the event had primarily commercial purposes, unlike earlier major activities on the Mall. Three weeks later, the United States Senate overwhelmingly passed legislation that, when enacted into law, limited displays of commercial sponsorship on the Mall. On July 7, 2007, one leg of Live Earth was held outdoors at the National Museum of the American Indian on the Mall. Former Vice President Al Gore

title: "National Mall" content: presented, and artists such as Garth Brooks and Trisha Yearwood performed. Occurring once every two to three years on the Mall in the early fall from 2002 to 2009, the U.S. Department of Energy Solar Decathlon displayed solar-powered houses that competitive collegiate teams designed, constructed and operated. Igniting a controversy, the Department of Energy (DOE) decided to move the 2011 Decathlon off the Mall, claiming that this would support an effort to protect, improve and restore the park. Federal officials stated that heavy equipment that had placed two-story houses on the Mall during earlier Decathlons had cracked walkways and killed

title: "National Mall" content: grass to a greater extent than had most other Mall events. On February 4, 2011, a Washington Post editorial criticized attempts to have President Obama restore the event to the Mall. Nevertheless, by February 12, 2011, at least thirteen U.S. Senators had signed a letter asking the DOE to reconsider its decision. On February 23, 2011, the DOE and the Department of the Interior announced that the 2011 Solar Decathlon would take place along Ohio Drive southeast of the Franklin Delano Roosevelt Memorial in West Potomac Park. The event took place in the Park from September 23 through October 2,

title: "National Mall" content: 2011. The 2013 Solar Decathlon took place in California instead of Washington. From 2003 to 2013, the National Book Festival took place on the Mall each year in late September or early October. However, the event moved to the Walter E. Washington Convention Center in 2014 because the NPS became concerned about the damage that pedestrians had inflicted on the Mall's lawn during previous Festivals. A four-day exhibition took place each year on the Mall during Public Service Recognition Week (the first full week of May) until 2010. Government agencies participating in the event sponsored exhibits that displayed the works

title: "National Mall" content: of public employees and that enabled visitors to learn about government programs and initiatives, discuss employee benefits, and interact with agency representatives. However, the 2011 United States federal budget (), which was belatedly enacted on April 15, 2011, contained no funding for that year's event, forcing the event's cancellation. The event did not take place in 2012. On June 12, 2010, Tareq and Michaele Salahi, a couple under investigation for allegedly crashing a White House state dinner for the Prime Minister of India in November 2009 (see: 2009 U.S. state dinner security breaches), hosted an America's Polo Cup match between

title: "National Mall" content: company, stated, "We are not sponsoring this event and have informed the people managing this event of that, ... We have sent legal notices to this effect, and he keeps on advertising us as a sponsor. I don't know what world he's living in." The inaugural USA Science and Engineering Festival Expo took place on the National Mall and surrounding areas on October 23 and 24, 2010. More than 1,500 free interactive exhibits reportedly drew about 500,000 people to the event, which had over 75 performances. The second Expo took place on April 28–29, 2012, in the Walter E. Washington

title: "National Mall" content: Convention Center. On Veterans Day, November 11, 2014, Bruce Springsteen, Eminem, Rihanna, Metallica, Carrie Underwood, Dave Grohl, the Zac Brown Band and other pop entertainers performed on the Mall during a free evening Concert for Valor honoring veterans and their families. Attendance was in the hundreds of thousands, making it one of the biggest events on the Mall for the year. The annual Screen on the Green movie festival took place on the Mall on Monday nights during July and August for 17 years until 2015. Free classic movies were projected on large portable screens and typically drew crowds of

title: "National Mall" content: thousands of people. Organizers cancelled the event in 2016 when the event's sponsors (HBO and Comcast) terminated their support, stating that they needed their resources for other projects. From 2006 through 2010, the NPS conducted a public process that created a plan for the future of the National Mall. On July 13, 2010, the NPS issued in the Federal Register a notice of availability of a final environmental impact statement (EIS) for the National Mall Plan. The two-volume final EIS responded to comments and incorporated changes to a draft EIS for the Plan. On November 9, 2010, the NPS and

title: "National Mall" content: end of the Mall a wide expanse of paved surface in Union Square to accommodate demonstrations and other events by reducing the size of the Capitol Reflecting Pool or by replacing the pool with a fountain or other small water feature. Additional proposed changes included the replacement of the Sylvan Theater on the Washington Monument grounds with a facility containing offices, restaurants and restrooms, as well as the replacement of an open space near the east end of Constitution Gardens with a multipurpose visitor facility containing food service, retail, and restrooms. On December 2, 2010, the National Capital Planning Commission

title: "National Mall" content: (NCPC) unanimously approved the final National Mall Plan at a public hearing. The NCPC's approval allowed the NPS to move forward with implementation of the Plan's recommendations. On March 1, 2012, the NCPC discussed a proposal that would decrease the Mall's existing green space by widening and paving most of the north-south walkways that cross the Mall between Seventh and Fourteenth Streets and by replacing with gravel large areas of grass that are located near the Smithsonian Metro Station and the National Gallery of Art's Sculpture Garden. On September 8, 2011, the Trust for the National Mall and the NPS

title: "National Mall" content: announced an open competition for a redesign of the spaces on the National Mall that Union Square, the Sylvan Theater grounds and the Constitution Gardens lake now occupy. Former First Lady of the United States Laura Bush agreed to be the honorary co-chair of a drive to raise funds for the three projects. On April 9, 2012, the Trust for the National Mall announced the ideas for the redesign of Union Square, the Sylvan Theater grounds and Constitution Gardens lake area that finalists in the competition had submitted. The Trust asked the public to submit online comments that the competition

title: "National Mall" content: jury would consider when evaluating each design. The Trust announced the winners of the competition on May 2, 2012. Groundbreaking for the first project was expected to take place by 2014, with the first ribbon-cutting ceremony by 2016. On October 1, 2015, the NCPC approved preliminary and final site and building plans that the NPS had submitted for the first phase rehabilitation of Constitution Gardens. Plans included the relocation and rehabilitation of the Lockkeeper's House, C & O Canal Extension, a new entry plaza at the corner of Constitution Avenue and 17th Street, NW, landscaping, a meadow and pollinator habitat

title: "National Mall" content: and a new perimeter garden wall. A temporary path will connect to an existing plaza located at the eastern end of Constitution Garden's lake. The NPS began to implement the first phase rehabilitation of Constitution Gardens in 2017. The Park Service moved the Lockkeeper's House, C & O Canal Extension, southward and westward away from Constitution Avenue, NW and 17th Street, NW while retaining the structure's east-west orientation. The NPS restored the building's exterior to its pre-1915 modifications and replaced the structure's brick chimneys, thus restoring the building to its original 1800s appearance. The building reopened temporarily in late August

title: "National Mall" content: 2018 and permanently on September 13 of that year. The house now serves in its new location as an NPS education center. From 2010 to 2012, NPS contractors rebuilt the aging Lincoln Memorial Reflecting Pool, which had first been constructed in the early 1920s and whose water had come from the pipes that supply Washington, D.C., with its drinking water. As a result of the project, the pool now receives filtered water from the Tidal Basin through a high-density polyethylene (HDPE) pipeline. The NPS then began a four-year restoration of the portion of the central axis of the Mall that

title: "National Mall" content: lies between 3rd Street and 14th Street. By 2016, the restoration project had completely replaced the deteriorated and weedy turf that had previously covered much of that part of the Mall with a new cover containing soil, fescue ("Festuca") and Kentucky bluegrass ("Poa pratensis"). The National Mall is accessible via the Washington Metro, with the Smithsonian station located on the south side of the Mall, near the Smithsonian Institution Building between the Washington Monument and the United States Capitol. The Federal Triangle, Archives, and Union Station Metro stations are also located near the Mall, to the north. The L'Enfant Plaza,

title: "National Mall" content: Mall on March 16, 2012, shortly before the start of the 2012 National Cherry Blossom Festival. The National Mall is the official midpoint of the East Coast Greenway, a 2,900 mile–long system of shared-use bicycle trails linking Calais, Maine, with Key West, Florida. The NPS licenses pedicab drivers to provide transportation and tours of the National Mall through its Commercial Use Authorization program. General visitor parking is available along Ohio Drive SW, between the Lincoln and Thomas Jefferson Memorials. Bus parking is available primarily along Ohio Drive, SW, near the Lincoln and Thomas Jefferson Memorials and along Ohio Drive SW,

title: "National Mall" content: in East Potomac Park. There is limited handicapped parking at the Franklin Delano Roosevelt and World War II Memorials and near the Washington Monument and the Thomas Jefferson, Lincoln, Korean War Veterans, and Vietnam Veterans Memorials; otherwise, parking is extremely scarce in and near the Mall. In April 2017, the NPS awarded a contract for the installation of parking meters on streets and in parking areas on the Mall. On June 12, 2017, the NPS and the District of Columbia Department of Public Works began to enforce metered parking on approximately 1,100 parking spaces in which motorists could previously park

Answer: 20