Hi. I did own an O.S. .32 but it was in a Nexus so I really cannot compare the power. However my TT .39 idles and runs very well and seems to have plenty of power for my Venture. I would go ahead and get the TT .39 for your heli. The only thing is I have noticed is that it seems to eat more gas than my O.S. I would recommend this engine though.