I put one of these together for a friend when they just came out. He put an old OS .40 fourstroke in it and I was doubtful it would pull the plane around. First day at the field it did WAY more than that. I watched him pull succesive inside and OUTSIDE loops 5-6 at a time without loosing any altitude. It's a cool little plane and way more aerobatic then you'd think but then it calms down real nice for slow flight and landings. It'll make the newbies look like seasoned vets. I HIGHLY recommend the plane and I think Sig really did their research on this one!