i had the phoenix suhkoi 31. if you get it i would suggest you put a .50 to .60 2-stroke on it. for 4-strokes i do not know. also i would not use the 2 piece nylon motor mount that comes with it or you will have engine vibration problems. i had enya .50 cx on mine and i had to mount the engine on the extreme end of the mount for proper cowl fit. i ended up using a 4-stroke mount on it. do not do medium to slow tight turns with it or she will snap out. other than that it's a nice plane.