Hello Stunning. If you have not purchased an engine yet for this plane then I would suggest you go with a .61 size motor. This plane comes out a bit heavy for a .46. I have had 2 of them and still fly the second. The c.g. is wrong on this plane. Do not attempt to balance at the recommended c.g. point. It will come out way too tail heavy. Balance at 3 inches from the leading edge and it will land real good and fly solid. I use a gms .61 in mine and it flies with authority. A .46 will fly it but just barely. If you have anymore questions feel free to ask.