Hi Guys, the engine is a HP 40, autrian made. I have flown these engines for many years on my fathers planes and they are a superb peice of engineering. (I was always too young to fiddle as Dad did it for me) They have a .25 size case with 40 horses. Excellent power to weight ration. Mecoa are now producing them with a high price tag to boot.

I must admit I thought about more of a funfly prop. (what advantages would I get with a APC 11x4 typoe prop?) I will add that to my list of things to try.

Thanks for the interest and as soon as the weather picks up and I can get out I will let you guys know the results.