well with out seeing what happen it hard to tell what happened
but after seeing some like fotor's flex mine never flexed that much
the polyglass made the wing flex less, then just before the NEAT FAIR
I added flaps and a extra carbon reinforcement to the wing .
while checking the balance I noticed even less flex in the wing
now the model flew 3 times before the accident and its
possiable that by making the wing to stiff , it tranferred the
load more toward the inner part of the wing , add the high gusting
wind and it couldn't handle the load - also the wing from the damage
appears to come off down and back not up , as you might expect.
this model is under reconstruction and may fly again will mount
the little video camera's to check wing flex
I did this to get rid of excess flex in my cessna 421
then with the fix