RE: Where can I find some modern combat engines?
Maybe it is for the .15 if there is a recess on the top leading edge. .25's are used all the time on them. A .36 may be overkill, especially a fast one. Even the .15 is pretty fast, likely over 100, and they don't slow down on a 3 ft. loop. The Fora is pretty powerful. Ask the guys you are going to play with and see what they are running. I just fly mine on my own and even a cheap Rossi copy is pretty hard for an old guy like me to keep up with on the FAI plane.