<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>nprecup</author><text>I&amp;#x27;m assuming you mean angle of attack, not flight path angle. The aircraft could certainly be capable of a 60 degree climb until it slowed down enough that it couldn&amp;#x27;t maintain a low enough angle of attack. It probably could only sustain something less than a 30 degree climbing flight path angle (while empty), as that would be pushing the limit of the thrust to weight ratio. That being said cameras can be used in ways that make things look much more dramatic than they actually were.&lt;p&gt;As a side note, at 30 degrees AoA the aircraft will not be able to continue flying anyway, the wings will have stalled well before that, and the pilot would be made painfully aware of this fact through stick shakers, aural warnings, and very rough tail buffet.&lt;p&gt;I&amp;#x27;m a flight test engineer, so this stuff is what I get to do for work! :)</text><parent_chain><item><author>overcast</author><text>According to comments, it was nowhere near vertical, which is why they didn&amp;#x27;t show it from a side angle. Apparently indicator light goes off at 30 degrees, indicating imminent engine stall.</text></item><item><author>hermitdev</author><text>Boeing also did a near-vertical take off in the 787 during their initial tests (and a few times after at air shows) This video [1] from a past Paris air show, shows a 787 ready for a delivery to Vietnam Airlines doing a very aggressive &amp;amp; short (but not vertical take off). Pretty ballsy to do such a thing in such an expensive jet that&amp;#x27;s on its way to delivery to a client.&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=B5_8D8HCnS4&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=B5_8D8HCnS4&lt;/a&gt;</text></item><item><author>kordless</author><text>This was done in Seattle: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=Ra_khhzuFlE&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=Ra_khhzuFlE&lt;/a&gt;</text></item><item><author>kpao</author><text>It&amp;#x27;s an everyday occurrence during the development of our app (Infinite Flight).&lt;p&gt;We often get customers complaining about a misplaced sticker on a livery, a missing exit door in a particular variant of a the 737-900... That type of stuff is easily verifiable. But for things like the airplane not behaving in a way they expect in certain conditions, or perhaps a wrong approach speed or angle, discussions usually start with:
&amp;quot;We tuned the airplane based on information available to us at the time we built the airplane. We are happy to make any changes based on an actual report from one or more pilots flying on this airplane, or better yet, the aircraft manual if you can get your hands on one.&amp;quot;&lt;p&gt;The discussion usually ends there :)&lt;p&gt;One we get often is about why it&amp;#x27;s possible to do a barrel roll in a jet liner in Infinite Flight. We simply point them to the video of that test pilot who did one in a 707 ;-)</text></item></parent_chain></comment><story><title>A customer reported an error in the map used by Flight Simulator</title><url>https://blogs.msdn.microsoft.com/oldnewthing/20170418-00/?p=95985</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>Sharlin</author><text>The video is filmed from a distance using a long telephoto lens, compressing the perspective. The 2011 movie &lt;i&gt;Tinker Tailor Soldier Spy&lt;/i&gt; used the trick in a similar scene to a great dramatic effect [1].&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;petapixel.com&amp;#x2F;2016&amp;#x2F;01&amp;#x2F;25&amp;#x2F;this-dramatic-shot-was-done-with-a-2000mm-lens&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;petapixel.com&amp;#x2F;2016&amp;#x2F;01&amp;#x2F;25&amp;#x2F;this-dramatic-shot-was-done...&lt;/a&gt;</text><parent_chain><item><author>overcast</author><text>According to comments, it was nowhere near vertical, which is why they didn&amp;#x27;t show it from a side angle. Apparently indicator light goes off at 30 degrees, indicating imminent engine stall.</text></item><item><author>hermitdev</author><text>Boeing also did a near-vertical take off in the 787 during their initial tests (and a few times after at air shows) This video [1] from a past Paris air show, shows a 787 ready for a delivery to Vietnam Airlines doing a very aggressive &amp;amp; short (but not vertical take off). Pretty ballsy to do such a thing in such an expensive jet that&amp;#x27;s on its way to delivery to a client.&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=B5_8D8HCnS4&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=B5_8D8HCnS4&lt;/a&gt;</text></item><item><author>kordless</author><text>This was done in Seattle: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=Ra_khhzuFlE&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=Ra_khhzuFlE&lt;/a&gt;</text></item><item><author>kpao</author><text>It&amp;#x27;s an everyday occurrence during the development of our app (Infinite Flight).&lt;p&gt;We often get customers complaining about a misplaced sticker on a livery, a missing exit door in a particular variant of a the 737-900... That type of stuff is easily verifiable. But for things like the airplane not behaving in a way they expect in certain conditions, or perhaps a wrong approach speed or angle, discussions usually start with:
&amp;quot;We tuned the airplane based on information available to us at the time we built the airplane. We are happy to make any changes based on an actual report from one or more pilots flying on this airplane, or better yet, the aircraft manual if you can get your hands on one.&amp;quot;&lt;p&gt;The discussion usually ends there :)&lt;p&gt;One we get often is about why it&amp;#x27;s possible to do a barrel roll in a jet liner in Infinite Flight. We simply point them to the video of that test pilot who did one in a 707 ;-)</text></item></parent_chain></comment><story><title>A customer reported an error in the map used by Flight Simulator</title><url>https://blogs.msdn.microsoft.com/oldnewthing/20170418-00/?p=95985</url></story>