retreating blade

retreating blade

The process of the rotor blade moving away from the relative airflow (i.e., in the direction opposite to which the helicopter is flying). See retreating-blade stall.
References in periodicals archive ?
At high speed the main rotor is slowed to delay compressibility effects on the advancing tip, and unloaded by the wings to avoid retreating blade stall.
Apparently, on the second pass, he banked the helicopter to the left, and the retreating blade - the back end of the blade - struck the outcropping on the west side,'' Llorente said.
The OSR reduces the rotational speed of the blades in forward flight, to delay compressibility effects on the advancing tip and inboard stalling on the retreating blade.