I'm thinking of building a Walter Umland kit of the Stiletto 660. Let me hear your recommendations for engines, pipes, bellcrank/leadout/pushrod suggestions and fuel tank suggestions. I've been watching this kit for awhile and think I'll just pay the asking price. Let me say I'd like to spare no expense within reason for the best equipment that is "readily" available.
Well, the Stilletto was designed around an ST46 and that's what Les Mcdonald used in his World Champs models so that's obviousy a good choice.
The only caveat to that is it takes a really good strong one to fly the airplane with authority.
I built and flew one in the middle 1980's and started with a ST46...I didn't have a really strong one at the time and couldn't talk Walt Menges out of his (which really put most ST60s shame) So I shoehorned an ST60 in it nd Viola...instant wonderful airplane.
The one I'm planning to build soon is slated for a ROJett 61 RE wth a muffler.
You mentioned a pipe in your post but the Stelletto wasn't designed for a pipe and would probably take significant modification of the fuselage to house one.
With good power I believe the Stilletto probably flys as good as any stunt design in existence.
Randy Cuberly