The rudder helps reduce adverse yaw by helping to give a coordinated turn. The rudder can help ensure the nose of the craft is pointed in toward the turn. One of the built in mixes of the Ethos Mixer Library is the Aileron-Rudder mix. It ties the rudder to the aileron channel and helps deliver a smooth turn by adding rudder, proportional to your aileron stick deflection.

Though other brands of radios offer an aileron-rudder mix, Ethos offers far more control over the process, allowing the pilot to change variables on the fly. You can create custom curves, or use expo enhance the mix, and you can raise or lower the amount of rudder deflection you're adding while you fly. You can super fine-tune your plane to a level that will make it even nicer to fly.