it must not be to heavy. it weighs less than a friends with a os 91 boat anchor. the only overpowered one is the one with the os 160 fx. now that is power. the satio powers it the way it needs to be. truly unlimited every way. ever were. great planes don't know about power plants. or just can't fly. they should build it to be unlimited with that engine and i will use it. till then i will use what is right for my style. WELL I GUSSE ITS JUST COOL TO HANG AT 5 CLICKS. WELL NOT REALLY CLICKS .USE HELI THROTTLE RATCHET. SMOOTH. WELL IT STILL HAS NOT BLOWN UP YET. AND THE WARNTY IS ABOUT TO RUN OUT[X(]. OK A 100 MAKES YOU A DEVIL. WHAT DOS A 150 MAKE ME. WOO MAYBE I DON'T WANT TO KNOW[&:] OH A 91 IS WAY TO UNDER POWERED. GREAT PLANES IS NOT THE COMPANY THEY USED TO BE. THE WON'T ADMIT TO HAVEING PROBLEMS. OR ANY THING. AND SURE DON'T KNOW ABOUT 3D POWER. YES THE ENGINE WEIGHS MORE. BUT THE PLANE WEIGHS LESS. DOS THE WING KNOW ABOUT THAT. IT DON'T CARE