I have 3 OS 46FX's, and I love 'em. They really work best on planes such as yours with 11x5,10x6 props(APC). When you want more power later, buy a replacement muffler From Tower for the Tower Hobbies .46BB, It bolts right on and will give you 1000 or more additional rpm with mentioned props, you won't be disappointed.

JJ