servo lead length?
JR engineers recommend anything over 36" should have a coil. From a practical standpoint, we all know you can go over this and never have problems. I personally have planes with 48" extensions with no problems at all, and I know people with much longer extensions than that without any problems. But a coil certainly can't hurt anything, so it is best to use one for longer leads. We are experimenting right now with an RF filter to find it's full range of benefits and quantify the improvement in range. More information on that to follow.