Hi LeBlanc....I maidened a GP Cap 232 3-D a week ago with this engine.....Al I can say is very impressive....After choking it started on the second flip....I am running it with a Bolly wood 21\8 and a Bisson pitts muffler...The plane weighs 15lbs and the engine took it vertical forever....Don't know the RPM tho....It's fairly noisy with the bisson muffler,but it's not as noisy as some straight through mufflers.I cut the tips off mine......It is a charm of an engine,stared it,set the carb and flew it....


Jack