"3.Very few if any are flying 65% nitro. it just doesn't work well with the YS motors.

Furthermore, I do not think that you can fairly compare a stock 2-stroke leisurely running on 20% nitro to an often highly modified 4-stroke burning itself out on 65% nitro. (Many of the fastest pilots make engine modifications to get this extra speed; and, not too many run this high a nitro %. The fastest are also flying custom airframe designs . . . or at least custom airfoil and wing designs; and design factors considerably in their speed.) "

Iron Dog,
Am I that slow? I haven't competed with a custom airframe, airfoil, and or wing..... YET.... 2013 will have some surprises from the Skids Racing Foundation. I'm not sure if Speed will like it or not, but 2012 may of marked the last season of the black Spitfire. Time will tell.

Skids