Retreating blade stall
A high-speed limit on helicopters where the retreating blade, meeting slow relative airflow at a high angle of attack, stalls — causing vibration and a pitch/roll tendency. It sets the never-exceed speed.
Related terms
A high-speed limit on helicopters where the retreating blade, meeting slow relative airflow at a high angle of attack, stalls — causing vibration and a pitch/roll tendency. It sets the never-exceed speed.