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Author Topic: Crew dies at low vspd.  (Read 4040 times)

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Offline jer11

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22 February 2007, 18:06:32
On your DGIII crew dies at 20m/s.
While Doug's XR-1 dies at 36m/s. >:(:wall::wall:




Post Edited ( 02-22-07 18:22 )



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Offline DanSteph

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Reply #1 - 22 February 2007, 19:48:38
72km/h = low speed ?

Go Try that against a wall ;)

Dan


Offline jer11

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Reply #2 - 22 February 2007, 19:51:30
Quote
DanSteph a écrit:
72km/h = low speed ?

Go Try that against a wall ;)

Dan

:lol: Wall is on Hspd not vspd! XR1 impact at 20m/s is a moderate injury of the crew ;)




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Offline DanSteph

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Reply #3 - 22 February 2007, 19:59:42
Go try fall on ground at 72kmh then :pfff:

Dan



Message modifié ( 22-02-2007 20:00 )


Offline jer11

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Reply #4 - 22 February 2007, 21:10:59
here you are! test completed :)





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Offline Twilight

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Reply #5 - 23 February 2007, 05:40:41
Take some of the facts of these crashes.

1)DGIV, DGIII, and DGXR1 have no airbags at all, at most they have a seatbelt.
2)DGIV, DGIII, and DGXR1 were NOT built like a car, they do NOT have little 'built in' collapse safty zones that
decrease the amount of impact force.
3)DGIV, DGIII, and DGXR1 all contain presumably flammable fuel, presumable HIGHLY flammable fuel, and on impact
would likely explode.
4)DGIV, DGIII, and DGXR1 sit passangers upright, and with minimal frontal velocity combined with the 20m/s fall, the
neck can easily be snapped, or plain decapitation.

5) Let's do a mathmatical breakdown shall we?
mass = 19000 kg
Velocity (v) = 20m/s
Crash stopping distance = 1 ft (That'd be the ground collapsing, and TINY parts of the glider crunching before hitting
passangers.)

Put it into your equation, and churn up:

Impact force =
12467191 N
28028751 lb
or
1401 tons

A blue whale weighs about one hundred tons .
Some bones are able to support as much as 12,000 pounds per square inch
It takes as much as 1,200 to 1,800 pounds of pressure to break a femur (thigh bone).

So, my quesiton to you jer11, would you like to have 14 blue whales on top of you? That's the kind of force you'd
experience.


Offline sunshine135

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Reply #6 - 23 February 2007, 16:12:32
Quote
Twilight wrote:
 would you like to have 14 blue whales on top of you?

That sounds like the result of a bad night in a singles bar to me. :drunk:  LOL!

I would not want to be dropping at that rate. Doesn't the human body fall in normal gravity at a maximum of 16 m/s?
With that fact, you are descending faster than you body would fall in a free fall. If you wouldn't jump out of a plane
without a parachute, I wouldn't try landing any DGs at such a high rate of speed. That's called realism.

Hope your feeling better Dan.

Kind Regards,


"Sun Dog"

Offline Twilight

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Reply #7 - 23 February 2007, 23:41:12
The terminal velocity of a skydiver in a normal free-fall position with a closed parachute is about 195 km/h (120 mph
or 54 m/s).

54 m/s is just about gaurenteed to kill, unless some freak reason happens that you live.

What really kills you in the falls is the bones wanting to go in the same line of direction with more mass then the
organs/skin, and they just rip through your body. What kills you in a car crash is some part of the car. Either you get
launched through a thick reinforced pane of glass, or roll around hitting anything not tied down inside the car. what
would kill you in a space shuttle crash, is the fact that the subsystems wern't designed to stay in place in case of an
accident, there's no crash zones like in a car that allow desbris to move around, and to allow slow decelleration. In a
space ship crash, everything will be flying around, the top of the ship will crash down on top of you, crushing you like
a trash compacter, then the small rebound bounce will finish off any survivers, then because tons of fuel were
released next to grinding metal (SPARKS!) a fire/explosion will finish off Superman incase he was on board.

If you jump out before the crash, either you dont have time to escape the area of the crash and you get hit by debris,
or you have enough time to get out of the way, but you reach terminal velocity.

If you REALLY want realism, kill 1-2 people off at 14-17 m/s and 2-3 at 17-19 m/s.


Jer11, I want to put this in as simple as terms as possible for you. Running at full speed, you wouldn't want to hit a
brick wall. Now imagine running about 20 yards (one fifth of a football field) each second. So in 5 seconds you're on
the other side of the field. NOW run into that wall. Maybe you survive, but probobly not. This time, have two friends
shoot a sheet of metal at you as you run, going the same speed as you, hitting you right after you smack into the
brick wall. you have two impacts to worry about, the one with the ground, and the one with the layer of metal right
above your head.


Offline felixar90

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Reply #8 - 24 February 2007, 07:27:51
Quote
What really kills you in the falls is the bones wanting to go in the same line of direction with more mass then the
organs/skin, and they just rip through your body
I would say the opposite, the skin only is heavier than your bones so your organs and skinn get riped of your bones, and not
to forget the dozen of sharps bones debris that trashes trough rour body, and all you blood that is instantanly forced downward.

Did you ever see video from the 9-11, when people jump in despair...


   


Félix

Offline AndyMan

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Reply #9 - 26 February 2007, 03:55:14
Actually, in a real aviation accident I once studied, the General Aviation training aircraft hit the ground hard, but not
hard enough to break anything in the aircraft. There was no post-crash fire, and when rescuers approached the
aircraft, the two occupants appeared to be sitting calmly in their seats. However, upon examination, both were dead.
Upon removing the occupants, it was discovered that the gut packages (read: Intestines, Stomach, etc.) Had exited
the body in the direction of impact (read: Through the seat of their pants).

Studies done on crashes such as these have shown that the human body can withstand about 40g's of forward
acceleration without dying (however many ribs and other bones may be broken) along with slightly more rearward
acceleration. In contrast, the human body can withstand only about 4-5g's of downward acceleration. In fact, in my
private pilot ground school class, a safety instructor told us "Don't fly down canyons. However, if you do, and you find
you are going to hit the ground, do it straight forward, not downwards."


Offline Twilight

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Reply #10 - 26 February 2007, 11:20:23
Yeah, point is, it isn't low vspd, and yer gunna die.

and aircrafts were designed to be able to withstand crashes to a degree too.


Offline AndyMan

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Reply #11 - 26 February 2007, 17:37:52
Wasn't arguing with ya Twilight, was pointing out that you can withstand a larger hspd crash than vspd crash


Offline computerex

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Reply #12 - 22 March 2007, 07:36:49
Quote
Twilight wrote:
The terminal velocity of a skydiver in a normal free-fall position with a closed parachute is about 195 km/h (120 mph
or 54 m/s).

54 m/s is just about gaurenteed to kill, unless some freak reason happens that you live.

What really kills you in the falls is the bones wanting to go in the same line of direction with more mass then the
organs/skin, and they just rip through your body. What kills you in a car crash is some part of the car. Either you get
launched through a thick reinforced pane of glass, or roll around hitting anything not tied down inside the car. what
would kill you in a space shuttle crash, is the fact that the subsystems wern't designed to stay in place in case of an
accident, there's no crash zones like in a car that allow desbris to move around, and to allow slow decelleration. In a
space ship crash, everything will be flying around, the top of the ship will crash down on top of you, crushing you like
a trash compacter, then the small rebound bounce will finish off any survivers, then because tons of fuel were
released next to grinding metal (SPARKS!) a fire/explosion will finish off Superman incase he was on board.

If you jump out before the crash, either you dont have time to escape the area of the crash and you get hit by debris,
or you have enough time to get out of the way, but you reach terminal velocity.

If you REALLY want realism, kill 1-2 people off at 14-17 m/s and 2-3 at 17-19 m/s.


Jer11, I want to put this in as simple as terms as possible for you. Running at full speed, you wouldn't want to hit a
brick wall. Now imagine running about 20 yards (one fifth of a football field) each second. So in 5 seconds you're on
the other side of the field. NOW run into that wall. Maybe you survive, but probobly not. This time, have two friends
shoot a sheet of metal at you as you run, going the same speed as you, hitting you right after you smack into the
brick wall. you have two impacts to worry about, the one with the ground, and the one with the layer of metal right
above your head.


Geez...He is a cheerful guy!;)

« Last Edit: 22 March 2007, 07:36:49 by computerex »