I am thinking about building a 40" Lazy Bee. I have an older, bushed TT 15. Do you think this will be enough engine for it?

I have built 4 of the 40 inch Lazy Bees and wore them all out! I am building my 5th one now and it will be powered by a Magnum 15 double ball bearing engine as all of the previous have been. The Magnum 15 when tuned right will scream on this small aircraft which makes it a hoot to fly. The best fun flying plane I have ever owned.

The carb on the Magnum has a very course needle valve and is touchy to hit the sweet spot. Once you hit it will scream...Brian

I flew mine on a OS FP .15. That was a good match.