by RCModelReviews » Tue May 11, 2010 5:26 am
Yes, ESCs can radiate quite a bit of electrical noise and although it doesn't extend up to 2.4GHz, it can be more than strong enough to directly affect the operation of a receiver if it's in very close proximity.
The processor chips (microcontrollers) are susceptible to the inductive pickup of RF signals from something like an ESC or even a switch-mode BEC if the two devices are too close together.
Gas fliers have also discovered that sometimes the servo wiring (even long extensions) can pick up enough RF from the ignition to cause servos to act erratically. The magnitude of the induced noise is enough that the servo amps interpret it as control pulses.
So it's a very good rule of thumb to keep your receiver and its wiring as well clear of the ESC or other noise-generating parts as possible.
RCModelReviews.com, just the facts.