Funny you should ask.............

I just got back from flying a half hour ago... the first flights on my new Skybolt... with a brand new OS61 in the sucker...

A 60 size engine is excellent on that airplane. And that airplane is excellent with a 60 on it.

I was wondering about the engine size ever since reading some of the threads about the airplane. Eventhough the airplane built it's reputation as an outstanding airplane as a kit built 8.5 pounder with a 60 on it, there's a bunch who recommend bigger engines. After flying mine with it's 60, I got not the slightest idea why anyone would suggest needing more engine....