touchdown autorotation

autorotation to touch-down

autorotation to touch-downclick for a larger image
Auto-rotation in pitch, roll, and yaw axes.
An expression used by a helicopter pilot to indicate that he or she will be landing without applying power to the rotor. Also called autorotational landing or touchdown autorotation.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved