Hi: Everyone
I am swinging a 15 X 5.5 prop on my YS 120 right now but I was thing to use an Electric motor equal to a YS 140 or a little more power. I think I can get away with a 16 inch two blade or a 16 inch three blade prop with my landing gear.
I will stay with a 12 cell set up and a HV 160 ESC. I am not worried about over weight as long as it will not affect the flight of the Typhoon to bad. I don't fly competition anyway.
I need to start with finding a 12 cell electric motor for a prop around 15 to 17 size and how to mount it.
At one time I thought I saw a clamp style mount that bolted the electric motor to the YS motor mount. I don't have to go that rout (just being lazy).
I have some 50cc out-runner electric motors around the house but I was not sure if they will work. I think a 16 inch three or four blade size prop will be to small and over heat the ESC and motor.

Thank you Everyone for all your input.
The more, The better.

wayne