I fly the H of B 43" ws P-51D. It has a OS 25FX, I believe a 3 oz tank, no rudder control, and no landing gear. I love it. It is lightning quick. The engine is side mounted and I fly with a 270 mah battery. I have someone elso toss it because a P-51 can't be held easily with one hand. It is a easy kit to build and the wings don't look strong ennough but I have made some incredibely high G turns and it has stayed together. Good Luck!!!!!!!!!