WEll im back rolling on the four star 120, and am coming up to the point i have to decide on servos etc.


Im going to run a homelite 45cc conversion wiht electronic ignition on this plane from BCMA enignes. Theyre a little heavier than the glow motor it was designed for, and between the EI gear the motor, and the firewall reinforcement, im worried about mounting the servos close to the centerline.


I was seriously considering placing the two servo mounts to the rear of the plane. If both will fit i would mount them inboad with an access hatch between the second to last and last formers. It will keep the clean look, but with a hatch i can still get to them after covering. it will also add considerable mass to the extreme rear of the plane. It would also mean very short push rods instead of the longer more flexible ones running from mid plane.

Does anyone see a problem with doing it this way? Obviously im going to run heavy duty extensions to the rear servos. but those arent insanely expensive. ive heard these planes tend to be nose heavy anyway, and the heavier motor is not going to help....


Im was also planning on running 3010 servos in the fuse(or the tower version thats the same torque) and possibly digis on the ailerons(the low profile ones). Ive got a 9650 digital im not using, so it may go on the throttle, but i dont know i might just get a small servo for it. I thought if i used a smaller unit(like the spare 9650 ive got) i could run a VERY short linkage imeadeatly behind the firewall...



Thanks and Gig'em