HI LANCE! Too high of a wing loading combined with wing designs that aren't producing much lift at the wing tips causes planes to" fall of the table" Highly tapered wings, with symetrical airfoils don't fly too well slowly, BUT if you remove enough weight from such a plane, even these wing designs will perform OK. I have seen a full scale GEE BEE that excelled at low speed aerobatics, because they scrapped the low drag racing wing, and built the rest of the plane with up to date techniques that are lighter. You have to get way up in scale towards full size before alot of scale wing designs begin to work well in model aircraft at low speeds.