To: Crab
Nicho , as you will find elsewhere on this forum the avoid curve is created from data gathered by brave test pilot types who fly at selected heights and speeds, chopping the throttle and entering autorotaion after a 1 second delay that equates to estimated time for recognition of a real engine failure.
A Sikorsky test pilot was killed during the developmental testing of the S-58. He hit the ground hard and the gear collapsed and the helicopter rolled over and a blade stub entered the cockpit.
