RE: Club MAGNUM !
Randy, if you take the Tower Hobby engine muffler and put it on the Magnum 46, the Magnum will be much more impressive.
For sport flying, set the high speed needle on the rich side when tuning on the ground. With a full tank of fuel it should on the verge of 4-cycling. Do you know what that sounds like?
The 11x5 prop should be fine.
Ernie