A few years ago a man of my acquaintance picked up a BMW opposed twin
motorcycle engine, and was building an airplane around it. This was
his third homebuilt, so he had a proven track record - and his work
was top notch. The design was a pusher configuration - a descendant of
his original, which was a Titan Tornado. The engine was new, or nearly
so. I expect that the project was a success - but I moved before it
was finished, so don't know how it turned out.

David Johnson