I a bit suspicious of this whole wing twist thing.

Take a K-6 up to 100 and look at the tips.

Take an ASH-25 up to 80 with landing flaps on and look at the tips.

In the case of the K-6, she does have a few degrees of tip wash-out (leading
edge down)

In the case of the ASH-25 with landing flaps on, Only the inboard flaps go
down, the outboard flaps and ailerons go up to produce a negative angle of
attack.

So why do the wings in both cases bend down?

Why does the B-52 use spoilers instead of ailerons? Because at higher airspeeds
an aileron input causes the wing to bend and can cause the ship to turn in the
opposite direction (wing twist)

Even in a *certified* ship, if the wings start to tuck under and you don't
catch it right away, you could find yourself in a situation where elevator
won't stop the pitch down action. Now, all of this is at or above VNE, so if we
are flying our glass slippers within limits, we should be OK.
JJ Sinclair