SIG 25% Cap 231 Ex Engine selection
I have a 1.60 on mine and POWER is no problem. I flew it on a 1.08 OS and it would fly but thats about it. The 1.60 gave it perfect without adding any weight. I also installed a 24oz. Dubro tank on it's side to give me about 15 min. flight times. The ones I have seen with the FPE 2.4 seem to fly heavy...may be just me though.....1.60 gets my vote...Johnny