G'day

I'm with Jaka. A friend and I were flying his Boomerang 40 yesterday with an AX 46 in it. With that engine it is on the overpowered side but not grossly so. With the 12 x 6 prop on a 55 I suspect you may find the plane hard to land AND you will have to watch the torque on take off too.

I have overpowered several trainers "for fun" and landing has always been a problem. The larger prop will still be producing quite a deal of thrust even at idle and with a new engine which is not yet idling perfectly, the thrust from a slightly high idle can keep a plane flying when you really want it to land.

The simple solution is to make sure you can cut the engine reliably in flight so that in the event that it just does not want to land, you can cut the power and glide in.

The other problem can be torque. Go easy on the throttle when taking off and things should be OK. Slam it open and you may find you have rather a hand full of plane.