The aircraft experienced a sharp right wing drop
, followed by a hard swerve to the right.
Lockheed Martin is developing a spoiler for F-35C Joint Strike Fighter flight test aircraft to counter potential wing drop
in transonic turns.
We did notice a sharp left wing drop
during a stall series, but Bowers insists this isn't normal for the airplane.
There was a slight amount of right wing drop
during power-on stalls (it was a gusty day when we flew the aircraft), but recovery was quick and easy by getting the nose down and neutralizing the controls.
The SAM exhibited no bad habits in a stall, with a noticeable buffeting followed by a drop of the nose, and no wing drop
In essence, his article is about countering a wing drop
if it occurs at the point of stall.
During the landing rollout, both pilots felt the right wing drop
and heard a noise like "a blown tire.
He observed the left wing drop
down and the airplane impacted the ground.
While in the stall, though, if you add some crossed controls you could see a wing drop
dramatically and begin to enter a spin.
That means the pressure of the fast-moving air above the wing drops
while the pressure beloe remains higher.
When one wing drops
, the force vector of the lowered wing becomes "more" vertical, since the wing is now flying parallel to the ground, and the vertical lift component of lift of the raised wing becomes reduced, resulting in a moment about the longitudinal axis.
The maximum-lift wing pushes while the stalled wing drops
, and the airplane rolls (or violently snaps: over into a spin.