For years, before the advent of computer radios, modelers often used offset servo output arms and bellcranks to achieve differential aileron movement. Today, by plugging in the aileron servos to different channels and using the aileron differential program menu in your computer radio, you can greatly simplify the setup task for this. But how do you know if your plane needs it and how do you set the correct amount? Jason Benson gives us the answers in this video explaining what aileron differential does and how to test it.
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