Edge540Ts:

Did you see the picture in Tom's post in this same thread? He has them mounted right behind the motor box and says he's getting no interference. 99% of the time, a ignition that has a leak will produce noise into the radio system via the servos. If the ignition is 100%, no leaks, nothing broken or wires frayed, etc. There should be no problems (or RFI). Now, if your like me and don't trust the throttle & choke servos being that close to the engine and do not want to use fiber optics, there's another way to go. A Isolator. I will be using one in my setup, but only if there is a problem. There's many different brands of Isolators, I4C, Glitch Buster, from EMS/Jomar and the Power R' Buss Pro from ElectroDynamics. These will separate the servos from the receiver to eliminate the RFI. BUT! Build the plane first with the servos up where Tom has them on his DA50 setup and if there's no interference, you won't need a isolator or fiber optics. Chances are almost 99% it'll work fine without adding any extra circuit to the system. BTW, these Isolators only weigh in at about 1/4 of a ounce, or 7.5 grams. Not enough to even worry about. (Same with the fiber optics all three components, the encoder & decoder and optic line would not weigh more than that also.) So with either system your not looking at any savings of weight. I understand your looking for places to save weight, but you have to get into ounces before there's really any savings. An example would be to go with Tom's twenty dollar package of the lighter wing tube & landing gear. I believe you can save almost 10 - 11 ounces with these. This would be a good start to weight savings. And as the planes get into the hands of folks that bought them, I'm sure there will be many postings on how they came up with ways they found to save weight.