• nullpotential@lemmy.dbzer0.com
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    1 month ago

    Attach the ejector seat TO the helicopter blades so that they both eject and you get a cool propeller and can fly around and it can shoot lasers and stuff too.

  • Admetus@sopuli.xyz
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    1 month ago

    I think it’s the Apache helicopter that stops the rotors instantly on eject. No need for Mach 13. I know this graphic is a joke though, I just remembered this cool thing about the helicopter.

  • Ekky@sopuli.xyz
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    1 month ago

    Just detach the blades. You can always re-attach them when you’ve landed.

  • unemployedclaquer@sopuli.xyz
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    1 month ago

    Sus. I watched AirWolf, and Magnum P.I. AND I’ve studied Leonardo di Vinci. Helicopters are next-gen tech and they don’t crash.

    • Contravariant@lemmy.world
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      1 month ago

      Heck if accelerating to Mach 19 in about 2 meters is acceptable you could just disable the rotors and only experience an acceleration of less than Mach 1 in just a few meters.

      • BluesF@lemmy.world
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        1 month ago

        What about that fancy thing that stops table saws when you touch them? Just get one of those and stop the rotors. I’m certain there’s no physical reason this wouldn’t work.

        • dashydash@lemmy.world
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          1 month ago

          The energy will have to go somewhere, so the passengers can stand up with their arms stretched, and when the rotating energy reaches them they can jump out and they will start spinning and their arms will act as rotors keeping them in the air long enough to reach land safely. You just need to make sure there aren’t a lot of people on board because the energy will have to be divided on all of the passengers, if there isn’t enough for everyone, they will fall to their death.

    • Madison420@lemmy.world
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      1 month ago

      When helicopters lose power they just fall. If the rotor head isn’t decapitated then when you get ejected sideways there’s s no zero chance you’ll be julienned on the way down.

      It’s why the most (only version currently in operation) common method of helicopter ejection severs the head or blades while it’s still rotating so it/they spin off and hopefully away and then the seat rockets away.

      • Summzashi@lemmy.one
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        1 month ago

        Your first sentence is wrong. Stop explaining things you don’t understand yourself.

        • Madison420@lemmy.world
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          1 month ago

          It’s a fact. Helicopters in general do not have the ability to glide to a landing, they can auto rotate if the rotor is still moving and has enough momentum. If the rotor stops or detaches helicopters fall…

          • psud@aussie.zone
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            1 month ago

            “if the rotor stops” luckily in this universe we have conservation of motion so the rotor doesn’t typically stop in flight

            Sure though, were it to detach the helicopter would fly like a brick

            • Madison420@lemmy.world
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              1 month ago

              Hubris isn’t looked on Kindle in the aviation world.

              Not common doesn’t mean not possible, we teach autorotation for a reason and it’s not because everything happens perfectly and every aircraft is perfectly maintained.

              Helicopters crash constantly and just as an fyi auto rotation is falling with style and so is glide.

              Like I said helicopters just fall, an aircraft in the most extreme engine failures tend to be able to glide effectively helicopters can never count on that luxury. So I dunno, since you agree maybe hop off the high horse and apologize.

              • psud@aussie.zone
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                1 month ago

                I’m terribly sorry that I pointed out conservation of momentum in a thread where you want to imagine helicopter rotors can just stop. I know that reality is inconvenient.

                • Madison420@lemmy.world
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                  1 month ago

                  Being wrong is the issue.

                  Rotors can add have seized, rotor failure is actually one of the more common modes of failure in a helicopter. Also notably I didn’t say it had to stop just that the rotor is no longer effective, like catastrophic blade loss.

                • andrewta@lemmy.world
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                  1 month ago

                  You are failing to ask him a question: how does he know what he’s talking about?

                  His phrase was “we teach” which implies he’s an instructor. You should ask him if he is.

        • Madison420@lemmy.world
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          1 month ago

          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.

          • SSJMarx@lemm.ee
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            1 month ago

            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.

        • tibi@lemmy.world
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          1 month ago

          Now you have blades shooting away from the helicopter at a high speed which could kill someone.

        • TranscendentalEmpire@lemm.ee
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          1 month ago

          Mainly just copium for the pilots. Helicopters aren’t like airplanes where you have glide time and altitude to decide what to do after something bad happens. If you watch fixed winged ejections there’s usually about 30 seconds to a min after something goes wrong before the pilot decides to bail. Helicopters go from everything being fine, to a debris field in seconds.

          • Estiar@sh.itjust.works
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            1 month ago

            It’s more about altitude than the ability to glide. Helicopters can do what’s called Auto rotation, which means they actually can glide. If the blade seize up however, they can’t autorotate. Helicopters fly a lot lower than most airplanes though, so they can’t glide as far.

              • Estiar@sh.itjust.works
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                1 month ago

                Wow. I’d be nuts to fly one of those things. 6000 VVI sounds like suicide

                With the collective firmly held down on the bottom stop, things happen very fast. The helicopter is descending in a hurry, as in 4,000 – 6,000 feet per minute. Do the math, if you are at 1,000 feet and the descent rate is 4,000 feet, you have one quarter or a minute – 15 seconds – to find a place to land.

                • TranscendentalEmpire@lemm.ee
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                  1 month ago

                  Yeah, helicopters are the apex predators of soldiers and rich people. Even if you pull off the perfect autorotation, the glide ratio is still only a maximum of like 3:1.

                  I think I remember reading a report somewhere that more people have been killed by practicing autorotation than have actually pulled it off in the wild.

      • chiliedogg@lemmy.world
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        1 month ago

        The Kamov does it.

        The individual rotor blades are separated from the center with an explosive charge and their centrifugal motion carries them laterally away from the vehicle as the seat rockets straight up.

        • skulblaka@sh.itjust.works
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          1 month ago

          As a bonus, whoever was close enough to shoot you down is about to get at least one heavy steel javelin flung terrifyingly close to their direction at high speeds.

          I’m assuming here that impact with a long range SAM is probably something you’re not about to eject from.

          • chiliedogg@lemmy.world
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            1 month ago

            In cases like that I’d imagine you’d try and eject prior to being hit, though I don’t know enough to know how much warning time there is.

      • notabot@lemm.ee
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        1 month ago

        Several models of helicopters have ejectable blades, this article mentions a few, and has a diagram of the blade severing system.

        • Steak@lemmy.ca
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          1 month ago

          Damn never would have expected that. Thanks for showing me something new!

  • Etterra@lemmy.world
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    1 month ago

    Oh boy I love it when death is multiple choice!

    1. Fiery explosion
    2. Cuisinart of Doom
    3. Squeezing your brain into hips
    4. 9mm of lead therapy
    5. Other: __________