Feathering is a crucial technique used in many variable pitch propellers. It involves adjusting the blade pitch until it aligns closely with the incoming airflow. This adjustment significantly reduces drag, especially when the engine has failed or is intentionally shut down. In single-engine aircraft, like motor gliders, feathering the propeller during engine shutdown can enhance gliding distance remarkably. For multi-engine aircraft, feathering the propeller of a non-working engine not only cuts down drag but also minimizes adverse yaw. This improvement leads to better handling and overall flight performance when one engine is out.
