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 ?
In theory, this additional thrust should have an upper advance-ratio limit due to a growing region where the retreating blade stalls.
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.
The flow field is unsteady and three-dimensional, with transonic flow on the advancing blade, dynamic stall on the retreating blade, blade-vortex interactions (BVI), and vortical wakes.
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. A piston-engined A160 flew in 2002, having been developed by Frontier Systems, which was taken over by Boeing in 2004.
Patrick Agyemang sprinted down the right with a man advantage over the retreating Blades.