I have a ST/G-51 in a Pica Rapier II swinging an 11-6 on 10% fuel. 54" wing span, weighs about 5lbs. Let me tell you, it is a rocket! I also have a ST/GS-45 in a Sig Mid Star swinging a 10-6 on 10% fuel. It is PLENTY fast. And what a sweet flying airplane. You will like it, to be sure.