I flew my Rascal 40 last week. I have a YS 63 for power. This plane will do knife edge loops. You have to put in full aileron to nullify the coupling affect but the plane will fly knife edge all day long. You can do most aerobatics at 1/4 throttle and I have airbrakes hooked up and it will slow down to a walking pace on landing. My plane weighs 6 lb. 3 oz. on baby scales. I have an 1100 ma battery pack in the plane. I run a 12-8 APC prop and I run 30 % nitro heli fuel. I highly recomend this pland to anyone. I joined my wings together. I have a pick-up truck and the big wing is no problem.