"buttman" wrote

Well I've never flown any of those planes. All the high wings I've
ever flown have always had electrical flaps, and the only mechanical
flapped plane I've flown was a low wing. I didn't think it was
possible to have a cable or a shaft go through the floor, up the sides
of the door, then across the roof.

Well, high wing airplanes do have ailerons, and somehow the designers manage
that control linkage. Flaps control linkages are in principle no different,
in fact they may be easier to implement.