Originally Posted by
rrritchey
I will say that as far as I know, an ECU is much less noisy than a gas engine ignition so RF is less of a concern. I guess the only concern here would be a shorted ECU which could then rob your receiver of power. In my opinion, its best to keep the radio redundant and separate from what ever the engine uses for power. That way you have a better chance of getting the plane down if something happens in your engine system.
Technically, that could happen with any servo just as easily (sometimes an overheated servo will fail closed and short out, going as far as to burn the cables that power it).
This issue could also be solved by using a properly sized fuse.
Please consider this more of an academic discussion than a practical one, I am just curious to find out what could cause such a setup to fail, without settling for the usual 'it's voodoo, don't do it' explanations I often get with issues such as this