I think I am confused by the statement "barely fly" does that mean the biplanes they are familor with where underpowered? I think you need to give us more explaination on what you are looking for. One of my favorite planes for outdoor flying is the Fancy Foamy Ulitimate. Very tough, I put a himax outrunner in it with 1320 TP 3s. Totally vertical, but slows down very nicely.

Larry