"Morgans" wrote in message
...

"Stealth Pilot" wrote

rotec is not in consideration. my target is a light 40 hp engine for
single seat aircraft.

How about a Harley Davidson motorcycle engine? I see some guy has been
using one for airplane use.

It seems like it would have a lot of things going for it. Air and oil
cooled, power output shaft designed to drive a primary drive belt, just
like could be used to drive a prop. Light and should have plenty of power
for your use. Plenty engines available, different sizes, and good
supplies of aftermarket parts.

The only drawback is the uneven drive pulses, and only two cylinders-at
that. Still, it seems to work for at least one guy.

I saw a three cylinder Harley-like engine on a TV motorcycle show once. I
wonder how that would work.

And, it sounds cool for a bonus!
--
Jim in NC

IIRC, the then current Harley was a recommended powerplant for some ot the
Mignet "Flying-Flea" aircraft of the period c1970.

Peter