Originally Posted by
speedracerntrixie
You can of course use a Y but if your TX has dual aileron servo mixing why would you want to? Using the mix gives you much more adjust ability.
But it is not mandatory. Many times a model does not need fine trim control and mixing that can be obtained with this set up, not to mention the RX might not have enough servo ports to provide a place to plug in that extra servo. I have a 50cc Ultimate biplane with 4 aileron servos. I have them all on y harnesses and it works just fine. Unless I had a power expander, it would not be possible, nor practical to run each one independently into the RX.