I don't mean to disrespect your project but the idea of flying behind
a Harley-Davidson engine-I owned a couple of them before yuppies made
them expensive, they were the most cantankerous, oil-leaking things
around. With only two cylinders don't you have torsional vibration
problems out the wazoo?

It seems like a short time ago the homebuilders finally figured out
you could use a modern liquid cooled auto engine, now you're running a
1930s air-cooled big displacement twin..Don't get me wrong, if it's
reliable I wish you all the success in the world, anything has got to
be better than Lycoming for an obsolete product peddled for a king's
ransom. I don't know what seems weirder, the sound of a Hog taxiing
out or the look on Harley management's faces if this actually becomes
popular.