Originally posted by Azizza
One Servo will also be reversed off of a Y harness. Very important for Ailerons
Not true. Both servos will turn the same way. You must hook your push rods to the opposite side of each servo to get the desired opposite movement. If you need to reverse the direction of the servos (as for elevators) you need a reversing Y Cord (if you don't have a computer radio)
Originally posted by Azizza
You have much more percise control over each aileron. You can make minor trim adjustments to one without having an impact on the other. And you can mix them to move up and down at different rates or with more or less travel independently. Something that can't be done with a Y Harness or single servo setup.
Also not true. You can get differential from a single servo by rotating the 6-arm wheel 30 degrees (45 degrees for a 4-arm wheel) and connecting to the two parallel arms (See Pic).