I agree with Dana that the rotary is a good choice, just heavy for our application. Ron, www.atkinsrotary.com should be a good link to being able to actually acquire a single rotor setup that would be compatible to the KR. I was just little let down about the weight vs. hp output for this single rotor. I also don't like the idea of the installers who want to rotate the engine plugs up, to make the install easier, because this starts complicating things by requiring more equipment like a dry sump oiling system, because engine oil flow is now altered and must be pumped everywhere like an inverted engine. This just adds more weight and more things to fail. One thing to consider concerning the vibrations that Dana mentioned is the use of a Fluidamper brand harmonic balancer designed for the engine application, and the flywheel from a manual or straight shift version of that engine, to give more mass to absorb these vibrations. The manual flywheel would also have the effect of increasing rotational mass, which would then lead to more torque applied, while absorbing those vibrations. Robert Finch has a great book out on the subject and goes through every aspect of using auto engines for aircraft, as well as sources for additional information, parts, install kits etc...
Colin & Bev Rainey KR2(td) N96TA Sanford, FL crain...@cfl.rr.com or crbrn9...@hotmail.com http://kr-builder.org/Colin/index.html
