ORIGINAL: RCKen
Additionally, if you are building a plane with 2 aileron servos may need a Y-harness if you plan on running both servos from a single channel on your radio. If your radio can support 2 aileron servos (most do these days) you won't need a Y-harness. Most people simply run both servos from a single channel at this level. Later on down the road as you advance you may want to run 2 servos from 2 different channels. The biggest reason for doing this is so that you can program aileron differential into your ailerons.
Hope this helps
Ken
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Yes, I've read some on the Servo per Aileron set-up.. That is a little too advance, flying-wise for me right now. I'm going to keep it simple for starters