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I saw this video and wondered is this real.

https://we.tl/t-BAukJQlHeG?src=dnl (Please open link and download video

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    $\begingroup$ Leonard, I added another video, because I expect that man people feel suspicious about downloading from a file share service. Now it is redundant - feel free to remove any of the two video links. $\endgroup$ – bogl Jun 16 at 10:23
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    $\begingroup$ @bogl thanks for helping me. I removed the video (sorry) because my video looks more like a real plane and your video is an RC plane. Scared that people will confuse. $\endgroup$ – Leonard Tan Jun 16 at 11:17
  • $\begingroup$ No problem, I will add it to my answer them. $\endgroup$ – bogl Jun 16 at 11:21
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    $\begingroup$ Please include a written description of the video, with preferably a screenshot of a frame, as the link would look suspicious to most. As it stands, the question body/title are unclear, and links eventually go down or change. $\endgroup$ – ymb1 Jun 16 at 11:48
  • $\begingroup$ ffden-2.phys.uaf.edu/webproj/211_fall_2016/Collin_Lasley/… $\endgroup$ – Steve Jun 20 at 21:34
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Yes, it appears to be a real video of a small remote controlled plane. The thrust/weight ratio is so high, that it can hover with the propeller similar to a helicopter.

When you search for "rc airplane hover", you will find many similar videos on Youtube, for instance this one:

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  • $\begingroup$ But to me it looks more like a real plane.... Can you tell me how does it look like a RC plane $\endgroup$ – Leonard Tan Jun 16 at 11:15
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    $\begingroup$ In your video you can tell from the lack of details on the plane. For a start, look at its windows. $\endgroup$ – bogl Jun 16 at 11:23
  • $\begingroup$ Yeah, saw that there are no one inside $\endgroup$ – Leonard Tan Jun 16 at 13:49
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As bogl said, this is a very light model with an electric motor. Electric motors can also be fashioned into ducted fans to make fine "poor man's jet" models, thanks to today's lighter weight and powerful batteries.

There is also some good "post stall" flying entering the hover, using bottom wing lift at 45 degree AOA. Tanner Swett's lift vs AOA graph shows that "top" (Bernoulli, etc.) lift decreases post stall, but "bottom" (hand stuck out window of car) lift keeps rising, producing a second lift maxima, nearly equal to the first, at 45 degrees AOA. However, with much more drag.

So, the pilot uses this maneuver to transition out of level flight to hover.

Also notice the very low aspect wing, critical to the design, and very large control surfaces.

Yes, this video is real, but most GA aircraft do not have a thrust to weight ratio of greater than 1. It's the far lower drag "top" lift that keeps those planes flying.

So these are essentially advanced acrobatic maneuvers, that can be safely explored with models first.

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  • $\begingroup$ The one in the QE's video has a combustion engine. $\endgroup$ – bogl Jun 16 at 14:03
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I've seen Wayne Handley do that with the Turbo Raven several times at Oshkosh in late 90s. To this day the most amazing airshow act I've ever seen.

He would fly across the airshow line, slow down and enter a hover in front of the crowd, fly in a box pattern sideways and up and down, then accelerate straight up to several thousand feet. The elevators and rudder functioned as "cyclic" and the ailerons, which went all the way to the wing roots, had enough surface area in the propeller wash to function as anti-torque.

It had a PT-6-25 with a thrust to weight >1:1.

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