Hello all,
At my wits end with problem, i have a CMP Giles fitted with an RCS140 gas engine, the only reason i have not flown is i cannot get rid of interference problems when the engine is running. The RX, battery and servos are all as far away from the engine as i can possibly get them, the throttle servo is the closest and that is out of neccecity, i am using a PPM receiver to proof the system prior to install a PCM RX.
The issue seems to come from the spark cap, i have tried two types, both the original, and a DA cap, both present the same problem. Today while i was testing the plane, i held onto the plug cap, so that it was hard against the engine, the interference stopped, release the cap and it would start again. I have come to the conclusion that the issue is spark cap related. Neither cap is resistive and i dont beleive the NGK CM-6 is resistive, could this be the cause. The DA cap is almost new and was bought specifically to test for this problem, it has not helped, although it does sit well on the original lead with the braiding. Futhermore i have also tried a seperate ignition system from a different engine.
Any ideas would be greatly appreciated, i am at my wits end. Can anybody recomend a solution?