what prop
 

what prop would you put on a 48 with mousse can pipe? i was thinking about a 8x10?

what prop
 

We need some more information. What is the plane? Has it flown before?

If the first flight, I would prop for thrust to get out of any troubles on takeoff and to limit top end, so 10x6 or 10x7. If a quickie or dust, I would try a 9x8 or 9x9, perhaps a 9x7. You have to see if the 8x10 has enough thrust for your application (ie a sleek airframe). When all else fails, my speed prop of choice for .46 to .50 engines, is the 9x8, and I experiment from there.

Paul

what prop
 

it is an ATS dingbat it has flown before on a 10x6 on a .40. i stuffed it into the ground doing a roll 6ft above the deck at about 110mph no damage at all bar the engine cracked the crankcase. want to put a 48 o it to make it go faster :D :D