Hi All
I have a Mirage pusher prop plane and have flown it twice and suffered a lack of control on both occasions
I have traced the problem down to electrical noise - when the motor is running I can only get about 8 paces away in an aerial down range test.
As it is a pusher plane the motor is of course at the back and the battery is at the front for balance I have extended the motor wires (brushless) to the ESC to have the ESC at the front for balance

Will this cause more interferance than extending the battery wires ?

The motor wires run directly past the reciever which I know is not best practise but I have no option, in testing I removed the reciever from the plane as far as the servo wires etc would allow but still had the range problem.

Bert

Perhaps your control issues are a symptom of low voltage when you run the engine. The battery may be getting weak, or perhaps the BEC circuit is being overloaded by too many servos. When you add the demands of running the motor, that might be enough to pull the voltage low enough to disrupt control. It might be worth verifying that you are maintaining about 5 volts on the receiver while the motor is running. You might need a higher capacity battery. I think, generally, brushless power systems are fairly immune to RFI problems because there is no brush sparking.

Reducing noise
http://www.rcgroups.com/forums/showthread.php?t=793837

Call the company.
Is the motor rpm hopping around with all the surfaces?
Or only certain surfaces ?
Check each connection by GENTLY squeezing bullets, or GENTLY pressing a connector into the receiver board.
If everything is jumpy check the crystal freq. & that the trans. has a trans. Rec, has a rec. crystal.

Call the company.
Almost forgot. NO metal pushrods into any other metal parts. NOISEY. NO push rods laying on each other.

I LIGHTLY twist the motor leads to get about 2 or 3 turns in 1 inch of length.

Rich