Ken,

You will probably get several replies but here goes. Yes you could do a Renesis (2 Rotor) for the 10. The problem is that it would be difficult to impossible to use the cars finely tuned intake and exhaust manifolds in the plane. The more critical being the intake. I you can build a good manifold that mimics the standard one, remembering that we only need the shorter high-speed circuit you could get good results. The bigger problem really is that the Renisis produces that 235 HP (Mazdas more reliable number) at 9K RPM. Most of the PSRU's are less than 3:1 reduction so your output would be less, that is if you didn't build your own. Ken Welter uses a belt reduction for his Coot amphibian at 3:1 with good results, but is always easier to use a larger engine at less than max output than a smaller one running balls out! Provided the weight and balance is OK with the larger engine of course. This is the basic premise used on all the standard aircraft engines. A 540 ci. auto engine making only 260 HP now days would be laughed at, but it work well for the particular design mission. So the conclusion? It is possible to do a renesis RV-10 just more difficult.

Bill Jepson