How helicopter survive a crash?
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How they survive a crash? The pilots cannot eject leh....unless the rotors are blasted off first... how how how?
recently quite a couple of helicopter crashes in US... -
auto rotation.....Originally posted by sgboy2004:How they survive a crash? The pilots cannot eject leh....unless the rotors are blasted off first... how how how?
recently quite a couple of helicopter crashes in US... -
eject downwards/sideways?
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That's the only way. If you can't escape then cushion the fall.Originally posted by Rockhound:auto rotation..... -
Cant they jump out the window?????
Do u call it window in the first place????
If not then smash the windscreen and jump out....
Do u call it windscreen in the first place???
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wad bout the passengers??!!! AHHHHH!!!!
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scotty, beam us up! hurry!
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usually the pilots and aircrew will go for a course called H.U.E.T Course. these course will teach them how to survive crash when into water
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yes its called a windshield, windscreen, window.Originally posted by Whistar:Cant they jump out the window?????
Do u call it window in the first place????
If not then smash the windscreen and jump out....
Do u call it windscreen in the first place???
how can you jump when you're strapped in the seat trying to cushion the crash? -
passengers? too bad, sit tight and trust the pilot.Originally posted by KLZW:wad bout the passengers??!!! AHHHHH!!!! -
the best way to survive is pray hard....
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wads that?Originally posted by Rockhound:auto rotation..... -
Ever had those toys that look like a fan, you blow it and it spins?Originally posted by sgFish:wads that?
Its something like that... the rotor unlocks from the gear box and lets it spin freely as it falls. -
If the engine fails, the heli can "auto-gyrate". Meaning the rotor blades which do not have power from the engines are now free to rotate of their own accord. By doing so, they create drag on the heli, thus slowing down the descent. Like a parachute for the heli. THIS IS THE THEORY...
IN PRACTICE...
if the heli is damaged, or weight is distributed unevenly, the heli may also roll to the side or point tail or nose down, thus limiting the effectiveness of the auto gyration. Meaning... you will meet Mother Earth pretty hard and not necessarily with those parts of the heli that were supposed to do so (e.g. the skids or landing gear).
IN WHICH CASE....
The pilots' seats are designed structurally to withstand 20+g of crash energy, meaning to say, that upon impact, they will not be crushed even if a force equal to 4000 pounds were impacting on it. The pax seats are designed to a slightly lesser crash impact level (can't remember the reasons... probably saving the more expensive pilot and reducing weight of the heli are the key things). -
Auto-rotation is more applicable to engine uncommanded shutdown...
If the heli has damaged its tail rotors, you'll be spinning out of control. Then... good luck to you. -
Not sure if you guys heard of the SAF Helicopter crash in Brunei (happended in late 80s). All died in the accident except for a major. He survived as he was flung out of the UH before it crash down.
Guess it's more of being lucky. -
have limitations leh . . .if you are below 250m autorotration or not you will still die.Originally posted by kopiosatu:Auto-rotation is more applicable to engine uncommanded shutdown...
If the heli has damaged its tail rotors, you'll be spinning out of control. Then... good luck to you. -
Die... ehhhhh dependsOriginally posted by CenturionMBT:have limitations leh . . .if you are below 250m autorotration or not you will still die. -
er.. i noob in helicopters but i wondering if u were to crash into a piece of flat land, u want to jump out but helicopter the blade still turning? wount'nt the person be slices to pieces??or kanna hit by it??
cos my own view is helicopter is heavier, at the speed coming down without control, jump out kanna the blade,ppl jump out should be hit by the turning blade....????
Tis topic is a good qus. -
you jump out you will still fall at same rate as the helicopter if not faster, thats unless you jump up hard enuff to hit the blades or something. i think its relativityOriginally posted by bo liao:er.. i noob in helicopters but i wondering if u were to crash into a piece of flat land, u want to jump out but helicopter the blade still turning? wount'nt the person be slices to pieces??or kanna hit by it??
cos my own view is helicopter is heavier, at the speed coming down without control, jump out kanna the blade,ppl jump out should be hit by the turning blade....????
Tis topic is a good qus. -
then why cant helicopters have "ejection" seats, but downwards or sideways?
like the "door" of the seat gets pushes off, like the roof of the plane get pushes up and the pilot can get ejected out sideways? its a good idea rite?
and also if not possible, then get the "floor" of the helicopter seat to be able to "Drop" off at the push of the button, then the pilot can choose to dislodge from the helicopter when ready...and he also can wear a parashoot so that when he "free fall" he can open the parashoot and land to safety?
its unbelievable that heli-technology is so back-wards....they only know how to install weapons, missles on helis and make then big big and powerful but never think of pilot and passengers safety during accidents? -
you have to understand the amount of thrust an ejection seat provides, you want it to go sideways??? if you want it to go downwards that would be thrusting the pilot/co-pilot/passengers way faster to kiss the ground.
it is not backwards, they have thought (and tested, and researched) about it and it just isn't feasible for now.
And jumping out is just a pure silly theory. Let's see if you want to jump out at all if your helicopter is on the verge of crashing. First thing as a pilot you are to try to do is to salvage the situation, you don't start unstrapping yourself from the seat and opening the door to jump out and have a higher chance of dying. -
not quite, i am an engineer myself. If the floor and the seat were to just "fall" off, then there wont be a thrust needed right? it becomes just a free-fall para-jump right?Originally posted by kopiosatu:you have to understand the amount of thrust an ejection seat provides, you want it to go sideways??? if you want it to go downwards that would be thrusting the pilot/co-pilot/passengers way faster to kiss the ground.
it is not backwards, they have thought (and tested, and researched) about it and it just isn't feasible for now.
And jumping out is just a pure silly theory. Let's see if you want to jump out at all if your helicopter is on the verge of crashing. First thing as a pilot you are to try to do is to salvage the situation, you don't start unstrapping yourself from the seat and opening the door to jump out and have a higher chance of dying.
also, even if you "eject" the seat downwards, your helicopter should be moving UPWARDS, right?
in similar sense, by ejecting the seat downwards, it actually provides an upward thrust for the heli, which is good.
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its not going to work if the aircraft is falling itself. When its a free para jump there isn't something falling over your head at the same time.Originally posted by nightzip:not quite, i am an engineer myself. If the floor and the seat were to just "fall" off, then there wont be a thrust needed right? it becomes just a free-fall para-jump right?
also, even if you "eject" the seat downwards, your helicopter should be moving UPWARDS, right?
in similar sense, by ejecting the seat downwards, it actually provides an upward thrust for the heli, which is good.
if u want to thrust the pilot downwards, you're still going to thrust them downwards to the ground faster.
now, for the ejection seat to work. on a fixed wing aircraft, the canopy just ejects, where do you want the pilot to eject? like you said, below? Wiring to the radome goes below the pilot. with glass cockpits now, there's even more wiring going through there.
fix it the wiring above? and how does it make its way to the radome?
speaking of engineers, at my workplace we never trust engineers, they have the most theories and when they do fabricate something, it usually doesn't work and it has been proven time and again. -
Black Hawk Down also show heli with the side rotor destroyed by rocket...they just sit there...and say"super six one is going down,super six one is down" to radio thats allOriginally posted by kopiosatu:Auto-rotation is more applicable to engine uncommanded shutdown...
If the heli has damaged its tail rotors, you'll be spinning out of control. Then... good luck to you.