I am in a position where I have to mount my throttle servo less than an inch from my ignition on my DA50. Is this a recipe for disaster? If so, next to fiber optic extentions, what options do I have. Moving the servo will be very difficult.

not familliar with that engine but it sounds like it has a seperate ignition module.if so just shield the module with a sheet metal box as well as a bosh boot on the plug.

No hard and fast answers here. There will be a lot of suggestions but notheing that will be the answer every time. Many mount ignition batteries and servos in close proximity to each other all the time with no problems. Others play hell trying to get rid of the glitches.

Install the system the way you feel you need to. Use a PPM receiver to do the first engine off and engine running range checks. The range checks will have the absolute answer. If it checks good with a PPM receiver, then use whatever receiver you want to and go fly. Do not use a PCM receiver for the first range checks. They hide too much and it could bite you later.

Thanks guys.

A PCM reciever and a digital servo should be rock solid. The reciever close to the ignition will sometimes cause this, but not very often. Like someone else said do a ground range check first.

The problem with using a PCM receiver for the first range checks is that it will reject minor amounts of noise. This is the stuff you want to locate immediately if it is there. Frequently, minor amounts of noise initially rejected by the PCM receiver worsen with time to the point that the PCM receiver starts getting "hit" with the noise, causing lock outs and eventual crashes. Those that have been at gassers for a while learned this the hard way.

Using a PPM receiver permits you to find all the interference, if any, that is there in the begininning, making for a safer plane and installation when you change to a PCM receiver. If you doubt, check with some ignition manufacturers.

BTW, the DA-50 already has a fully shielded ignition system so there's no need to shield it further. Just don't use metal to metal contact points between the engine and the throttle servo. The rear induction system of the DA can make throttle servo installations difficult but it's been done many, many times before. If you feel the need to shield anything, shield the servo with electrical foil tape, but it should not be necessary.

Thanks again. I will follow your advice Pat.