Highest, fastest freefall attempt

The reporters are uneducated plebs not my fellow forumites
 
The reporters aren't wrong. That condition is called "boiling blood" you can also get it from deep see diving. It has to do with the decompression of the body at speed.

Any one know if they are attempting again today?
 
What happens to the capsule after he jumps? Does it also fall back to earth?
 
This is interesting the way I get it is at sea level the atmospheric pressure is 1 bar at 50 000 feet it is close to zero at 100 000 feet it must be close to minus 1 bar. So unless the flyer was going up in a rocket the 2 bar pressure change will not affect him. Not counting other factors like cold, O2 etc.Coming down will have no effect on him as he only has 1 bar of pressure to contend with.
 
Thugscub said:
This is interesting the way I get it is at sea level the atmospheric pressure is 1 bar at 50 000 feet it is close to zero at 100 000 feet it must be close to minus 1 bar. So unless the flyer was going up in a rocket the 2 bar pressure change will not affect him. Not counting other factors like cold, O2 etc.Coming down will have no effect on him as he only has 1 bar of pressure to contend with.
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He goes up in a pressurized suit otherwise he would die of hypoxia and hypothermia very quickly.

Also, minus 1 bar? Dude... No.
Sea level is one bar absolute pressure.
Outer space is zero bar.

Pressure change is probably something along the lines of .8 bar, and I can assure you when you are going from 1 to 0.2, decompression would be fatal.
It's equivalent in terms of volume change of going from 100m to 20m under water. The actual numbers don't really count, it's the ratios. I've never dived to 100m, but my ascent from 55m took 40 minutes on a no-decompression-stop profile.

His lungs would suddenly go from holding 2l of air to 10l of air. His eardrums would burst, any gas in his gut would probably rupture it.
That's not counting the issues with dissolved gases.
 
@ Sinbad
100 m of sea water is 10 bar absolute pressure is 11 bar. So you are saying at 100 000 feet is minus 11 atmospheres?

You will need a 5 bar pressure change to experience the symptoms you have described.
One will only rupture your lungs if you hold your breath.

A 1 ATM pressure change will have no effect on a human a 2 ATM pressure change will have an effect but very small as this is the equivalent to a 10m dive. I am not talking about cold, o2 or any other effects.
 
Thugscub said:
@ Sinbad
100 m of sea water is 10 bar absolute pressure is 11 bar. So you are saying at 100 000 feet is minus 11 atmospheres?

You will need a 5 bar pressure change to experience the symptoms you have described.
One will only rupture your lungs if you hold your breath.

A 1 ATM pressure change will have no effect on a human a 2 ATM pressure change will have an effect but very small as this is the equivalent to a 10m dive. I am not talking about cold, o2 or any other effects.
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No
I am talking ratios here. Where do you find minus 11 atmospheres? Absolute pressure cannot be less than zero
And no, you don't need a five bar pressure change.
Volume changes are consistent with pressure ratios, not fixed numerical values.

A 5 bar change from 10 bar to 5 bar will be uncomfortable. A change from 6 bar to one bar will kill you if it happens over a short time period. The difference is in the first instance the volume doubles and in the second it multiplies by 6.

Explosive decompression such as what would happen if his suit tore would happen in a couple of seconds. Air can probably not rush out of your lungs fast enough even if you don't hold your breath. It only takes a very small pressure differential between your lungs and the outside air to cause a rupture. I know of it happening in people ascending from a safety stop at 5m (pressure changes from 1.5 to 1bar)

For the record I am a certified master scuba diver with > 100 dives. I have done numerous chamber dives as well, and of necessity have a very good understanding (and some experience) of the implications of barometric change on the human body.
 
Methinks you are a put another dollar in diver.
I'm not going to have a peeing competition with you.
Have been a instructor with various agencies for over 25 years. Go and see whoever trained you and get them to explain all the general physics laws scuba divers use. Mind you you will have to cough up some more dollars for more info:)
 
ShaunSA said:
OK Thursday is out. Next weather window is Sunday, 14th October 2012.
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I really hope this time they are more organized with the live streaming with more on the ground coverage and much less blue skies.
Can't wait!! :D
 
Thugscub said:
Methinks you are a put another dollar in diver.
I'm not going to have a peeing competition with you.
Have been a instructor with various agencies for over 25 years. Go and see whoever trained you and get them to explain all the general physics laws scuba divers use. Mind you you will have to cough up some more dollars for more info:)
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If your agencies told you about minus eleven atmospheres, perhaps you should also have out a dollar in ;)
For the record, my university physics backs up what I learned about diving gas physics.
But yeah, no peeing contest. not necessary... :)
 
And 1 more question. What are the pressure changes our flyer will go through on his way up and on his way down in atm or psi?
 
Thugscub said:
And 1 more question. What are the pressure changes our flyer will go through on his way up and on his way down in atm or psi?
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Well. He's in a pressure suit. So probably no change ;)

If he was not, with an altitude of 31000m, air pressure is actually about 0.01 bar, pretty much negligible. So any gas at sea level pressures would want to expand to over 100 times it's volume.

The real terms pressure change will be 1 bar, 1 ATM and 14.7something psi.

The relative pressure change, which is what counts, will be a factor of well over 100.
 
No not possible. And a vacuum chamber does not exist. How do they measure their pressure.
 
A gas can not expand to over 100 times its volume in 1 atm change if it can please refer me to which gas law you are using.
 
Thugscub said:
A gas can not expand to over 100 times its volume in 1 atm change if it can please refer me to which gas law you are using.
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Boyle's law. Look it up, if you don't believe me


For a fixed amount of an ideal gas kept at a fixed temperature, P [pressure] and V [volume] are inversely proportional (while one doubles, the other halves).

So divide the pressure by 100, the volume multiplies by 100.
 
Morning Sinbad so divide by 1 multiply by 1 we both on the same track, the only time I think divers work in hundreds of bar is when their tanks get filled. That's another story once helium and one changes the O2 and N2 mixes. Anyway safe diving it's still my best hobby.
 
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