YS 115S crank replace
#4

Dan,
Flying standard 115s, 3 times had digital aileron servos fail on me, in-flight during race heats, on two different Fw 190D-9 Warbird racers. I was experiencing too much vibration out toward the tips of the wings. Since Richard installed the counter-balanced crankshafts into my three 115s, I have not had the same issues. It is not cheap to have them replaced; but for me, the cost beats not being comfortable to use the engine without risking the entire airframe due to resulting structural or equipment failures -- especially in competition.
Ollie
Flying standard 115s, 3 times had digital aileron servos fail on me, in-flight during race heats, on two different Fw 190D-9 Warbird racers. I was experiencing too much vibration out toward the tips of the wings. Since Richard installed the counter-balanced crankshafts into my three 115s, I have not had the same issues. It is not cheap to have them replaced; but for me, the cost beats not being comfortable to use the engine without risking the entire airframe due to resulting structural or equipment failures -- especially in competition.
Ollie