Flyjoe, it came out of a Stihl 23.6CC Thanks for that info Scott, 8400 rpm should move my plane real good. I am building a home made plane for this engine, foam and carbon fiber, hope to bring it in at 10# complete weight. The wing is 1300 sq.in. the wing ribs are one inch. wide foam, the spars are 3/8 balsa with carbon fiber. the plane is also being build for low drag.
Ken