Ok. Getting to the point, I intend to put it in a Funtana 125, talking regarding a 120AX here. I was going to order the prop from Tower but decided to postphone it till the time I actually order the 125 which will be some time April / May. I actually obtained the engine from my LHS, they had a 120AX ringed that wasnt selling because it didnt have a muffler.

What I wanted to know is, will a 17x4 be enough or should I get a higher pitch prop?. Note that the Funatana is 3D in intent and not designed to fly fast. Also, which propo to use to break-in?

Ameyam