The Thunder mustang and the Falconer engines are very cool. I got to see one up in Marysville Ca. Nice ride. If I can find a pic I'll post it. I thought for a second that that would be a great airplane project to build, better than an RV8. I looked it up, GULP!!! It's a tad outta my league right now.
When I saw the title of the thread I thought you guys were going to be talking about this little guy,
http://dynamotive.netfirms.com/merlin/
Orvis