The OS 32 engine is great. It should be plenty of power unless the airplane is made of lead... A good engine for it would be a Magnum 36. I've seen several of them, and they ran great except for one. The one that ran bad kept on literelly melting glow plugs every flight, even though it was low nitro, and running rich. They run best on 10 nitro though. What happened was the connecting rod was coming apart and putting metal shavings into the engine, and when those shavings hit the plug, poof. Magnum did hold up their end of the warranty. He sent the engine to them, and it took a little less than 2 weeks from him shipping it, to having a brand new one on his front porch.