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Old Feb 17, 2016, 01:59 AM
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ESTOL Vertical Landing

Hi!

This is not VTOL aircraft but it give some ideas about VTOL. Aircraft is 5 kg 1,9m F22 EDF figther. It has powerful 3-axis thrustvector control and the horizontal stabilizer protection rods (for rear mount touch down). What you see on video is (reverse flow) vertical landing. See also my sketch about vectors below.




MrJan's F22 Vertical Landing (0 min 31 sec)
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Last edited by MrJan; Feb 17, 2016 at 02:19 AM.
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Old Feb 17, 2016, 09:04 AM
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That was a nice STOL landing. I am not sure how much the wind was helping you though. I am also not sure of your theory, but your results are good.
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Old Feb 17, 2016, 10:55 AM
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Ran,

I agree. Maybe it's "parachute" style flow (see sketch below) or what ever. I think it doesn't matter what is the direction of flow. And I am pretty sure it can also be "reverse flow". But what is the most important thing is major control power and the ability to land hard.

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Old Feb 17, 2016, 11:03 AM
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About ESTOL

Last Flight of X-31 Ends with 24-Degree ESTOL

http://www.navy.mil/submit/display.asp?story_id=7189
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Old Feb 17, 2016, 01:12 PM
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Quote:
Originally Posted by MrJan View Post
About ESTOL

Last Flight of X-31 Ends with 24-Degree ESTOL

http://www.navy.mil/submit/display.asp?story_id=7189
Very cool. I think we will see a lot more of this "flying on the back side of the power curve" with fully autonomous aircraft. Designers will also adjust the landing gear to better support this kind of operation.
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Old Feb 19, 2016, 02:22 AM
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And the question. Can we simply rotate aicraft for vertical landing and take off? My unswer is. Yes I can. Is it also scalable? I don't know.
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Old Feb 19, 2016, 02:44 AM
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And this one:
Watch SpaceX's Falcon 9 Rocket Complete a Historic Vertical Landing (2 min 4 sec)
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Old Feb 19, 2016, 06:13 PM
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And the question. Can we simply rotate aicraft for vertical landing and take off? My unswer is. Yes I can. Is it also scalable? I don't know.
It certainly can be done, and was done with the Vertijet among others. With drones, there is likely to be a resurgence of interest in "tail sitters" as there is no pilot on board to be disoriented by the awkward landing position or poor ground visibility. On the other hand, tail sitters still have their problems including a general intolerance of wind. Never the less, there are many applications and missions, and tail sitters will be a good solution for some of them.
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Old Feb 20, 2016, 01:47 PM
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I have 3-axis gyro aided landing system. What we need is full computer aided landing system. In near future we have it. Then we can forget pilots disorietation and wind problems. Special landing gears we still need.
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