For auto-rotating to occur, the blades need to come to a stop from turning under power, and set up a reverse rotation in the opposite direction. At 4k feet alt., they prolly never even got stopped before impact, and especially if the faltering engine was inputting any power at all. A chopper that heavy is totally different from a little puddle jumper autogyro. It literally fell like a rock.
Not true! the blades do not have to stop in midair, I have been in full no power auto-rotations in a Sikorsky CH-53 from 2500 ft where the pilot never applied power to the engines.
Aircraft attitude and rotor speed make for safe auto-rotations.
Exactly. No time or altitude for the craft to auto rotate.
It has been almost half a century since I have done a simulated engine failure and an emergency autorotation and unless aerodynamics have changed dramatically since then, the blades do not stop and reverse direction for an autorotation to occur.
WHAT?!?!?!