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PHOTOGRAPHY BY HOPE McCALL WHAT YOU NEED TO KNOW ABOUT AILERON DIFFERENTIAL With aerobatic planes, aileron differential helps straighten and smooth out rolling maneuvers. For years, depending on the model setup, modelers often used offset servo output arms and bellcranks to achieve differential aileron movement. Today, however, using separate aileron servos and the aileron differential program menu in your computer radio has greatly simplified the task. But before we take a closer look, let's first...