RE: STUPIDLY THIN / STUPIDLY FAST...?
I expect the stall to happen with the "SWRs" right before touch down.....right at the same moment they tough alphalfa.
With the .049 - 061 powered SWRs, they have 120-150 square inches of wing area and range from 11 to 16 ozs. None of them ever come close to stalling and there have been a few times when they have had to be landed heading down wind.
If a certain magic wingload isn't exceeded, plus rigging them with conservative control throws like you would for any racer they begin flying just as soon as they leave your hand...even with just average power.
I'm not sure what the upper limit is for these flat airfoils, hopefully this attempt at a .10 sized racer isn't taking it too far....but that's the theme of this thread.