I gotta do this :) (100K sky dive

[Seth]

Count me in!!! Where do I sign? [img]graemlins/rock.gif[/img]

[Turbo V6 Camaro]

Originally posted by 98Camaro3.8:
OK, I was real bored and decided to write a C program to calculate it all out. Here's the results:

http://home.cfl.rr.com/mkaprocki/TerminalVelocity.txt

On a jump from 100,000 feet:
Max speed is 632 MPH at 86,000 feet.

If someone else is really bored and wants to see temperature and mach numbers, let me know (I doubt anyone cares).

Here's the source code for those interested:
http://home.cfl.rr.com/mkaprocki/TerminalVelocity.cpp

let me see them !!!!!

[OneQuickV6]

So it finally gets back down to that terminal velocity under 200 feet from the ground, wow. 4 minutes of free-fall :eek: Fun stuff...the math that is [img]smile.gif[/img]

[98Camaro3.8]

I was laying in bed last night and realized a flaw in my physics. The last program just checked to see if you were above Terminal Velocity. If you were, it just chopped your speed of, which is not how it would happen. Acceleration was also flawed, as it did not take drag into account.

This new code gives me a top speed of 552 mph.

http://home.cfl.rr.com/mkaprocki/TerminalVelocity.txt
http://home.cfl.rr.com/mkaprocki/TerminalVelocity.cpp

Originally posted by OneQuickV6:
So it finally gets back down to that terminal velocity under 200 feet from the ground, wow.

He's at terminal velocity much higher, but the air density is less so it's just a faster terminal velocity. 126 mph is only the terminal velocity at sea level. ;)

[ August 10, 2004, 12:47 PM: Message edited by: 98Camaro3.8 ]

[OneQuickV6]

Yea, what you said [img]smile.gif[/img] I mean he gets to what we normally consider TV for say sky-diving and such, not suicide from an airplane.

[speedy-v6-camaro]

At 552MPH assuming you reach that real fast is 809ft/s...which means it would take about 2 mintues to fall 100000 feet....not 4:30.

[JohnD.]

He's going to slow waaaaaaayyy down as he loses altitude.

[speedy-v6-camaro]

Thats the point...he won't even reach 552MPH...which is still less than the speed of sound.

[98Camaro3.8]

You reach the 552 mph at 80,000ft. Do you know how little air is up at that altitude? Once you hit that 552 mph you've gone the top speed, so you will be slowing down the rest of the way because the air gets much denser as you descend. At 10,000ft you're only going 148 mph.

[mjparme]

This jump was done back in the 60's I believe. He did break the sound barrier on the jump (I have seen it on the History channel).

As has been discussed above terminal velocity is a lot higher because of the decreased aire pressure. If I recall correctly he reached 640 mph. I will look it up though.

There was a guy in Australia that was going to attempt to break the record last year or so (for highest skydive). I am unsure if he made the attempt.

Also, scientist disagree what will happen if you body was exposed to a vacuum. But most agree that you wouldn't explode. So someone being exposed unprotected at 78,000 wouldn't explode either.

[speedracer95v6]

the nitrogen, etc. in your blood would boil out of your body, as would probably the water, etc. Explosion or not, there is gonna be a mess.

[speedy-v6-camaro]

No....you might freeze...but you won't explode. Your ear drums might though.

[Turbo V6 Camaro]

from what i have found the boiling point of water at that altidue is 98* you body being like 98.6 and 70% water what the hell you think is going to happen?

[mjparme]

viper, your post is so full of scientific misconceptions and faulty thinking I am not sure where to start. [img]smile.gif[/img]

First, normal body temperature is not 98.6 F. It is 37 C +/- 1. Yes 37 C converts to 98.6 F but don't forget the +/- 1. Lazy textbook writers converted 37 C to F and came up with 98.6, which is very misleading. Normal body temp in F is 96.8-100.4.

However, the point of your post is that water boils at 98* at that altitude and since the body is 70% water you would spontaneously boil. I don't know what the boiling point of water is at 78,000 feet but 98* sounds reasonable so I will go with that.

Your argument would depend on every molecule of water in you body being exposed to the atmospheric pressure at the same time. Logical thinking would demonstrate this to be false since much of the water is locked away in your organs.

I have read papers (available by using Google) where scientists discuss the effects of vacuum on the body and none of them suggest you would suddenly explode. The literature I have read suggests you would survive for several seconds after exposure to a vacuum. So at 78,000 feet which has considerably more pressure than 0 (vacuum) you would not suddenly explode.

[Turbo V6 Camaro]

Originally posted by mjparme:
viper, your post is so full of scientific misconceptions and faulty thinking I am not sure where to start. [img]smile.gif[/img]

First, normal body temperature is not 98.6 F. It is 37 C +/- 1. Yes 37 C converts to 98.6 F but don't forget the +/- 1. Lazy textbook writers converted 37 C to F and came up with 98.6, which is very misleading. Normal body temp in F is 96.8-100.4.

However, the point of your post is that water boils at 98* at that altitude and since the body is 70% water you would spontaneously boil. I don't know what the boiling point of water is at 78,000 feet but 98* sounds reasonable so I will go with that.

Your argument would depend on every molecule of water in you body being exposed to the atmospheric pressure at the same time. Logical thinking would demonstrate this to be false since much of the water is locked away in your organs.

I have read papers (available by using Google) where scientists discuss the effects of vacuum on the body and none of them suggest you would suddenly explode. The literature I have read suggests you would survive for several seconds after exposure to a vacuum. So at 78,000 feet which has considerably more pressure than 0 (vacuum) you would not suddenly explode.

yes you WOULD boil but, the thing most poeple are over looking, is THE ARE WEARING A SPACE SUIT..... there no way you could jump from that high and live your body would explode, the PSI up there is .5 punds per inch squared, sea level is 14.9

if you did't ex pled you would frezz if you didn't die from lack of O2 first