The effect of different designs of water rocket towards the max height of the flight ini berarti gambar design nya harus dimasukan dan kasihc keterangan perbedaan design nya dimana. Bagusnya pake diagram bukan foto trs kasih keterangan bagian2nya. Introduction Research Question : seberapa besar peran aerodinamika terhadap suatu benda terbang?AimThis experiment is led for researching the impact of various(different) design of the bottle to the influence its ability to fly. The data will be obtained from the maximum distance traveled by each rocket.RationaleBackground theoryAerodynamics is the way air moves around things. The rules of aerodynamics explain how an airplane is able to fly. Anything that moves through air reacts to aerodynamics. A rocket blasting off the launch pad and a kite in the sky react to aerodynamics. Aerodynamics even acts on cars, since air flows around cars.In order to overcome drag forces, an aircraft must generate thrust. This is accomplished with a motor-driven propeller or a jet engine. When the airplane is in level flight at a constant speed, the force of the thrust is just enough to counteract the aerodynamic drag. Moving air can also generate forces in a different direction from the flow. The force that keeps an airplane from falling is called lift. Lift is generated by an aircraft wing. The path over a wing’s curved top is longer than the path along the flat bottom of the wing. This causes the air to move faster over the top than it does along the bottom. With all other factors being equal, faster moving air has lower pressure than slower moving air, according to Bernoulli’s principle, stated by Daniel Bernoulli, one of the most important pioneers in the field of fluid dynamics. This difference is what allows the slower moving air to push up against the bottom of the wing with greater force than the faster moving air is pushing down against the top of the wing. In level flight, this upward force is just enough to counteract the downward force caused by gravity. Projectile MotionHypothesisWater rocket that will fly the furthest:Rocket A (Pointy, Wings, Fins)Rocket C (Pointy, No Wings. No fins)Rocket B (Blunt, Wings, Fins)The reason that rocket A will fly the furthest is that because rocket A is supported by the projectile motions with pointy end, and also from the wings and fins. The second furthers will be the rocket C because pointed end will reduce the air resistance of the rocket while flying so the disturbance during the flight is lessThe hypothesis for the rocket water design with wings, fins and pointed will fly further than all other designs ini hypothesis nya kalimatnya benerin. Disusun berdasarkan mana yg paling jauh. Klo kayak gini g jelas mana yg paling jauh. Kalimat ini menandakan 3 model ini jauh nya sama. This is because pointed end will reduce the air resistance of the rocket while flying so the disturbance during the flight is less. The second longest distance will be the one without wings and fins but has pointy end. This is because during the flight air resistance is more important than the stability of the rocket. Methods & MaterialsNo.VariablesDescription Details1.Independent VariableDifferent rocket designRocket A: Has wings, Has fins (pointy)Rocket B: Has wings, Has fins (blunt)Rocket C: does not have wings, does not have fins (pointy)2.Dependent VariableDistance Travelled by each rocket3.Controlled VariablesWeight of rocketThe amount of water inside rocketAngleGravityAmount of Water : 1 Litre / 1000 mLWeight : 250 gramsAngle : 60 Degree- MaterialsRocket: Soda BottleRubber BandStyrofoamPaperRocket launcher:Soda bottlePVC PipeBoardsHose BarbNailsRubber bandZip tiesSchrader ValveHoseRopeToolsTapeMarkerRulerMethods (Rocket):Roll a piece of paper into the shape of cone then wrap it with duct tape to make it stronger. (Extra paint job is optional)Attach the cone to the bottom of the bottle with tape or glue. Take thin cardboard and cut out 3-4 triangles then attach the fin (triangles) to the bottleApply the styrofoam to the place neededRepeat for each designsMethods (Launcher):Cut the launch TubeRound the end of the launch tubeCut the launch tube where the O-ring will sitCut the remaining PVC partsCut and drip the slip collarCut the base boardsCreate the O-ring seatAssemble the launch tubeMount the hose barb in the end capAssemble the lower pressure tubeBuild the launcher baseAttaching the zip tiesTape the zip ties in placeSecure the zip tiesTrim the schrader valveRemove the valve mechanismConnect the hose and valveAdd to the launch stringSafety PrecautionsMaterials. The weight assembly of the rocket might be developed of thin, bendable plastic. Just lightweight, non-metal parts might be utilized for the nose, body, and blades.Compressed Gas Safety. A sheltered separation should be kept up constantly amongst people and pressurized water rockets or launchers. The prescribed safe separation is as per the following:Launch PressureWith Eye ProtectionWithout Eye ProtectionUp to 60 psi10’20’Above 60 psi20’40’This Table Data is obtained from (https://makezine.com/projects/water-rocket-launcher) 5. Launcher. The launcher should hold the rocket to inside 30 degrees of vertical to guarantee that it flies about straight up. It might give a steady help against wind and any activating powers, and enable the rocket to be pressurized and unpressurized from a sheltered separation. Launchers should be built from materials appraised for no less than 3 times the proposed dispatch weight. 6. Launch Safety. I will utilize a commencement preceding dispatch to guarantee that onlookers are focusing and are a protected separation away. On the off chance that my rocket does not dispatch when activated, I won’t enable anybody to approach it until the point when it has been depressurized. 8. Flight Safety. Water rockets should not be coordinated at focuses, into mists, or close planes. Combustible or unstable payloads should not be conveyed. 9. Launch Site. Water rockets should be propelled outside, in an open territory no less than 100 feet on a side (for rockets utilizing a dispatch weight of 60 psi or less), or 500 feet on a side (for rockets utilizing higher weight). Methods of InvestigationFill the rocket with water until half the size (0.5 litre)Plug the rocket top with cork then attach it with small pump valve (like the one in bicycle) Make sure the stand is sitted on stable groundAttach the pump to the rocket (attach to the valve)Put the rocket carefully on the launcher and make sure it’s not too tiltedPump as fast as you can until the rocket takeoffGo to where the rocket land then measure how far it goes from the starting point.Collecting DataRaw Data No.Water RocketDescription Result(Distance Travelled) (Meters)XX=0.05 Meters1.Rocket ARocket Design: Wings, Fins, PointyWater: 1 LitreWeight: 250 gramsAngle : 60 degreeTrial 1:81.7 mTrial 2:84.2 mAverage: 82.952.Rocket BAngle: 60 degreeRocket Design: Wings, Fins, BluntWater: 1 LitreWeight: 250 gramsTrial 1:60.7 mTrial 2:59.9 mAverage:60.3 m3.Rocket CAngle: 60 degreeRocket Design: No wings, No Fins, PointyWater: 1 LitreWeight: 250 gramsTrial 1:61.3 mTrial 2:62.1 mAverage:61.7 mAnalysing DataThe launcher has to be perfectly at 60 degree so we can compare it with the other rocket designs. To apply a vertex graph towards the flight, we need to know the maximum height of each rocket and the initial speed which is (Vo).Since we already know the angle, the only problem for us to find the max height is the X max and to find the X max, the equation will be VO2sin 2?10. When we know the X max, then we can finally find the max height of each flight using the formula VO2sin22g.First trial rocket AX max = VO2sin 2?1081.7 = VO2(0.866) / 10VO2 = 81.710/(0.866)VO2= 943.418VO = 943.418VO = 30.710 m/sMax height = VO2sin22g= (943.418) (0,866)2 x 10= 40.849 mSecond trialX max = VO2sin 2?10 = VO2sin (2×60)1084.2 x 10 = VO2 (0,866)8420,866=VO2VO2=972.286 m/sVO=972.286= 31.181 m/sMax HeightMax height = VO2sin22g= (972.286) (0,866)2 x 10= 42.099 mMean height = ((40.849 )+(42.099))/2=41.474 mRocket B (60.7 meters & 59.9 meters)X max = VO2sin 2?10 = VO2sin (2×60)1060.7 x 10 = VO2 (0,866)6070,866=VO2VO2=700.923 m/sVO=700.923= 26.474Max height = VO2sin22g= (700.923 ) (0,866)2 x 10= 30.349 metersTrial 2X max = VO2sin 2?10 = VO2sin (2×60)1059.9 x 10 = VO2 (0,866)5990,866=VO2VO2=691.685 m/sVO=691.685= 26.299 m/sMax height = VO2sin22g= (691.685) (0,866)2 x 10= 29.949 metersMean height rocket B= (26.299)+(29.949)/2= 28.124 metersRocket C (61.3 Meter & 62.1 meters)X max = VO2sin 2?10 = VO2sin (2×60)1061.3 x 10 = VO2 (0,866)6130,866=VO2VO2=707.852 m/sVO=707.852= 26.605 m/sMax height = VO2sin22g= (707.852) (0,866)2 x 10= 30.649 mTrial 2X max = VO2sin 2?10 = VO2sin (2×60)1062.1 x 10 = VO2 (0,866)6210,866=VO2VO2=717.090 m/sVO=717.090= 26.778 m/sMax height = VO2sin22g= (717.090) (0,866)2 x 10= 31.049 meterMean height rocket C= (31.049)+(30.649)/2= 30.849 metersNo.Water RocketResultUncertainty1.Rocket AMax Height: 42.099 mDistance Travelled: 82.952.Rocket BMax Height: 28.124 mDistance Travelled: 60.3 m3.Rocket CMax Height: 30.849 mDistance Travelled: 61.7 mEvaluation and ConclusionThe result of the experiment shows that the rocket A flew the furthest. Without a doubt, this happens because rocket a is supported by pointy cone which helps the rocket to have lesser air resistance and more balanced because it has wings and fins to help to stabilized it. So the rocket can fly with less disturbance during the flight. However, Rocket B and C have a slight difference in the result. Rocket C beats rocket B in distance travelled by 1.4 (61.7 -60.3) meters. The difference between rocket b and c is that rocket b has the pointy cone advantage which will help the rocket fly more further because it reduces the air resistance while rocket C has more properties like fins and wings to help to stabilize the rocket while mid air so it can fly more straight and balanced. The aerodynamic design of water rocket improves the ability to fly further and have higher maximum height and helps to increases the chance of an object to succeed it’s flight. The use of pointy cone up in the front of the water rocket helps to maximize the distance of the rocket. This is due to having pointy cone will have less surface area on the front, the lesser the surface area is, the lesser that is in contact with the wind during the flight. Now back to the research question, ……….? It turns out that the having pointy cone have a bigger impact towards the flight of an object than having properties such as fins and wings. However, both sides has its own objectives and positives towards the flight. It is safe to say that aerodynamics plays a big role in the efficiency of a flight. Having pointy cone and properties such as wings and fins will have a great impact towards the flight. As you can see, there is a significant difference between rocket A and the other rockets. It shows that having a complete form of aerodynamic water rocket will fly the furthest rather than rocket who only applies one aspect of aerodynamic which is having only wings and fins or having pointy cone. The rocket with wings and fins will not be able to perform at it’s best and vice versa.