this post was submitted on 15 Aug 2024
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Any modern heli design will autorotate down. It's not exactly gentle, but it works.
Autorotation relies on one main thing, air being forced past a freewheeling rotor..... Air that is being forced past because you're falling.
https://youtu.be/NLjFQJiJsZc?feature=shared
Notice the immediate loss of attitude? It's because they're falling, unlike planes which can generally glide after an engine failure.
https://youtu.be/CEMlny_ExuU?
Specifically we're speaking about helicopter ejection which in most cases means total loss of power or control or both. The only known helicopter eje tion seat(to me at least) to operate currently in modern combat is the ka 50/52.
https://youtu.be/W6y_id3xOX0?
One like this one which happens to eject and notably falls like a stone.
The KA-50 and -52 destroy their rotors when the ejection seat fires, as shown in this simulation. That's why the helicopter drops like a rock after the ejection seat fires - the blades can't autorotate if they're not attached.
Assuming the blades are still attached, the helicopter will autorotate down even if it is completely unpowered. It might lose some altitude initially, but like you said once the air is moving over the blades fast enough for them to spin they will do what they were designed to do.
One thing helicopters and planes have in common is that if they fail too close to the ground autorotation/gliding won't help. Helis are generally more dangerous than planes for a lot of reasons, the biggest one being that they spend more time in the most dangerous phase of flight - landing.
Tell me you didn't read the root comment without saying you didn't read the root comment.
Losing altitude can be described as falling because the fucking thing is unpowered.
Agreed, though irrelevant.