The old Enya 35 or OS 40 FP were not marginal power for a Sig Kadet by any means. They flew fine on about 1/2 throttle. Lots of guys who are now old hands at this trained on planes like that. Did they have trouble learning throttle management? I trained on a 590 square inch Champ almost as big as a Kadet with a .15 and throttle management was never a problem for me. I did touch and goes, loops, rolls, etc. with that combination. A gallon of fuel lasted all summer.

An ASP 32 or 36 would be more power than the old OS 40FP. But it's too bad those old plain bearing engines are not made anymore. They were great for trainers and they could be made cheaply. When done training you could put one on a Q500 and fly up a storm. Now OS has people convinced they need a hot ball bearing 46 to fly a trainer, at $150 each, not to mention possibly replacing the bearings if they rust. We've let ourselves get snookered.

Jim