ORIGINAL: kuobin
I still have a old but good OS46SF H ringed heli engine ,want use it to flight airplane ,what will be the best propeller to fit?Thanks.
You will probably want to change the cylinder head from the heli type over to the aero type. Also, choose the prop according to the airplane, not the engine. I would think a 9"-11" diameter prop will work just fine but its going to really depend on the plane you're going to put the engine in.