Hi: Jim
I have built the combat models A-10 as a D/F. I used Kress fans on two OS. 25 eng. The engs. ran great but the Kress fans only had about 2Lb of thrust. The jet would fly but ( would come in last in a one jet race.) That was about 8 yrs ago. The C.B A10 Flys Great as an Elect. jet. with the new 90mm elec. fans and lipo batt. you can push almost a 1 to 1 thrust. .