The amazing thing is, they appear to never have tested how much those wings actually bent in an actual horizontal turn with a low-wing nose-puller... To this day even...
I've been looking for those wing in-flight turn stress tests for years now... And no, dive-pull-outs don't count, and that is what they do if they do it: I checked... This is because in a dive, the propeller is, in large part, unloaded by the extra dive speed...
For those who know my thinking about this, I think 3 G of turning at full power could equal 6 G of wing stress on these WWII fighter types, and the pilot limit of 6-7 Gs could mean 9-10 Gs of actual wing stress: Well within the ultimate failure limit...
Those who claim this is a violation of physical laws seem to confuse force and energy... I remember reading the claim (elsewhere) that this is is like claiming a perpetual motion machine... This shows you how clueless are those who claim this violates physical laws...
Unlike energy, yes you can get more force out of something than you put in... If you don't think this is true, you don't understand the difference between force and energy...
Gaston