Grumman X-29: An impossible fighter jet with inverted wings

Re:Grumman X-29: An impossible fighter jet with inverted wings by Gibbon1 on Sunday September 29, 2019 @03:27PM (#21109130)

> This causes the wing root to stall before the tip, which allows a pilot to maintain control as the onset of stall appears.

I think I've read and been told that also you want the root where the flaps are to stall before the middle where the ailerons are. Because stalling and losing your aileron control during a turn is bad news.

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Re:Grumman X-29: An impossible fighter jet with inverted wings by Gravityloss on Sunday September 29, 2019 @04:26PM (#21109417)

If one of your wing tips stalls, you will have a very fast roll and there is a high probability of entering a spin.

Also if a part of the wing that is far aft stalls, then that can cause pitchup, making the stall worse.

An aircraft with benign behavior stalls so that the nose stays pointing straight ahead with no roll or yaw but it drops (pitch).

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Re:Grumman X-29: An impossible fighter jet with inverted wings by na85 on Sunday September 29, 2019 @07:33PM (#21110344)

The loss of aileron control isn't hugely dangerous in and of itself. What's dangerous is the incipient spin. There is a yaw-roll coupling in most aircraft such that you can use the rudder to bank if you have to, even with zero aileron authority.

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