The impossible turn
This Youtube clip provides a useful demonstration of wing drop during a stall.
This stall was destined to happen at just about the point where the pilot entered the left turn. The pilot forgot how much drag increase there would be with the turn, made worse by the very small radius of the turn (brought about by the choice to turn in such a confined area).
This video clearly demonstrates several things:
A wing can drop during a stall - but we knew that...
Turns cause lots of drag increase.
An attempt to land from a non stabilized approach can turn out badly,
And, the impossible turn. There was some discussion about the impossible turn recently in another thread on the instructors forum, but the whole thread spun in.
This pilot attempted the equivalent of a turn back, though, with lots of power. All other things about what this pilot attempted were the same, as could be foolishly attempted after an engine failure close to the ground after takeoff. Low speed and altitude, and, 180 degree heading change in a small radius. This pilot intended this turn, and the only surprise (as opposed to a sudden engine failure) was that the aircraft simply was not capable of this, in the space available.
If, the pilot had not stalled and dropped the wing, at the altitude he did, he surly would have arrived at the water stalled, with no ability to arrest his rate of descent. There was just no lift or energy left in the aircraft. Had the plane been very light, and lots of power had been applied, things might have turned out better, but still, maybe not....
The left wing dropped, perhaps because it stalled, or perhaps due to a whole bunch of power being added, causing torque, which the lift of the wing, and aileron (with co-ordinated use of the rudder, of course) could not counteract.