low RPM recovery
In a helicopter, RPM (rotations per minute) is life! A helicopter pilot must understand how to recognize low RPM and have the automatic conditioned response of "lower/roll-on". By lowering the collective, the angle of attack is reduced in the rotor system and less energy will be required to increase the RPM. By rolling on throttle, the pilot will also be adding any reserve power that is left from the power plant.
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