Filling Rib Tube with Nitrogen vs. Air - Page 2

Matt · 28 April 2011, 08:44

Hell, even a pure vacuum is survivable.
I always thought films that show someone surviving a vacuum were utter BS, but then researched it a bit and found it is quite possible to survive.

willk · 28 April 2011, 09:26

A bloke at work once took a deep breath of helium and then ran off while holding that lung of helium to show his friends what a funny voice he had.

He got about 20 meters and dropped like a stone. He came round again as soon as his brainstem overroad his moronic frontal lobes.

As Polwart says, he was a moron before the incident.

chewy · 28 April 2011, 17:27

Quote:

Originally Posted by Matt

Hell, even a pure vacuum is survivable.
I always thought films that show someone surviving a vacuum were utter BS, but then researched it a bit and found it is quite possible to survive.

Do you mean an absolute vacuum?

Matt · 28 April 2011, 17:30

As opposed to?

chewy · 28 April 2011, 17:37

A partial vacuum?

willk · 28 April 2011, 17:37

Nothing survives Mrs willk when she gets the vacuum revved up....

Matt · 28 April 2011, 17:43

evs.

http://imagine.gsfc.nasa.gov/docs/as...rs/970603.html

Quote:

Originally Posted by chewy

A partial vacuum?

Pikey Dave · 28 April 2011, 19:10

Quote:

Originally Posted by chewy

As a rule you take one lung full and fall unconscious, your then in that N2 enriched atmosphere and can't think, nah I don't like this so I'm off, result is you are dead.
Why do you think you don't stick your head in nitrogen purged vessels and use a gas monitor instead?

Ahh now! If we're comparing grabbing a lung full from a tube (as originally mooted) to entering a Confined Space, that's a different kettle of Haddock. Confined Spaces,,,, welcome to my world!!

chewy · 28 April 2011, 21:07

Quote:

Originally Posted by Pikey Dave

Ahh now! If we're comparing grabbing a lung full from a tube (as originally mooted) to entering a Confined Space, that's a different kettle of Haddock. Confined Spaces,,,, welcome to my world!!

Not entirely, with nitrogen been heavier than air they is the potenial for the deck to fill with nitrogen, if the user was to inhale a lung full and "faint" as suggested they would fall into the boat where nitrogen could have already collected, then die.... whats the difference between popping your head into a vessel and getting a lung full and getting a lung full from a tube?

Pikey Dave · 28 April 2011, 21:16

Quote:

Originally Posted by chewy

Not entirely, with nitrogen been heavier than air they is the potenial for the deck to fill with nitrogen, if the user was to inhale a lung full and "faint" as suggested they would fall into the boat where nitrogen could have already collected, then die.... whats the difference between popping your head into a vessel and getting a lung full and getting a lung full from a tube?

But if enough nitrogen had leaked out of the tubes to fill up the deck space, the tubes would be flat, allowing all that heavier than air N2 to run out onto the floor/sea. This would create a partial vacuum on the deck which would then fill up with luverrly O2 rich air.
Your move

(probably to the bilges

)

chewy · 28 April 2011, 21:18

Quote:

Originally Posted by Pikey Dave

But if enough nitrogen had leaked out of the tubes to fill up the deck space, the tubes would be flat, allowing all that heavier than air N2 to run out onto the floor/sea. This would create a partial vacuum on the deck which would then fill up with luverrly O2 rich air.
Your move

(probably to the bilges

)

I know what your getting at and we could go all night (not in that way though) I wouldn't fill tubes with nitrogen because it has the potential to kill you if you get a lung full where as air doesn't.

Pikey Dave · 28 April 2011, 21:23

Quote:

Originally Posted by chewy

I know what your getting at and we could go all night (not in that way though) I wouldn't fill tubes with nitrogen because it has the potential to kill you if you get a lung full where as air doesn't.

Ok, we'll agree to differ.

chewy · 28 April 2011, 21:31

Quote:

Originally Posted by Pikey Dave

Ok, we'll agree to differ.

We'll agree that if I ever need a nitrogen enriched atmosphere checking your going in first!

PS, if you ever need a Tiffy give me a PM!

Matt · 28 April 2011, 21:42

??
http://en.wikipedia.org/wiki/Lighter_than_air#Nitrogen

Pikey Dave · 28 April 2011, 21:49

Quote:

Originally Posted by chewy

We'll agree that if I ever need a nitrogen enriched atmosphere checking your going in first!

PS, if you ever need a Tiffy give me a PM!

Tiffy??

That's a new one on me.

Anchorhandler · 28 April 2011, 21:58

Errrm, there is something else that no one has mentioned about nitrogen....

Nitrogen molecules are larger than oxygen molecules therefore in theory if your tubes had a slow leak then with 100% nitogen, they would deflate slower...well at least 20-21% slower anyway!

Is this a good reason to take your rib down to your local BOC gas center?.....errrm probably not, at least i wont be bothering anyway.

While we're at it, why not hydrogen....lighter than helium and if your outboard should run out of petrol when out at sea, you could always deflate a compartment or two just to get you home....simples (just got to remember not to smoke when aboard)

Simon

jyasaki · 29 April 2011, 01:52

Quote:

Originally Posted by Anchorhandler

Errrm, there is something else that no one has mentioned about nitrogen....

Nitrogen molecules are larger than oxygen molecules therefore in theory if your tubes had a slow leak then with 100% nitogen, they would deflate slower...well at least 20-21% slower anyway!

Only if the leak were small enough to only allow O2 molecules through. More likely, it allows both N2 and O2 through at a small rate of flow, and your leak would be exactly the same, but it would cost more to refill the tubes.

jky

Anchorhandler · 29 April 2011, 07:21

Quote:

Originally Posted by jyasaki

Only if the leak were small enough to only allow O2 molecules through. More likely, it allows both N2 and O2 through at a small rate of flow, and your leak would be exactly the same, but it would cost more to refill the tubes.

jky

Errrm, actually it doesn't work that way,
The nitrogen molecules will rub together when they try to pass through the 'leak' causing a bottle neck effect thus reducing flow . Think of it like opening a packet of cereal and pouring it into a bowl... Although each flake is much smaller then the packet opening occasionally they all jam up and you have to stick your finger in there to help them out. The flow through the leak must take into account pressure in the tubes, temperature of the gas and more importantly in this case, the type if gas.....

Geeez, my original post was intended to be tounge in cheek and not taken so seriously hence the Hydrogen comment!

Simon

weehaggisuk · 29 April 2011, 09:16

Quote:

Originally Posted by davemon

Any thoughts on how to eliminate mold from rubber(hypalon)?

Golden Cowry,

https://profiles.google.com/101053888109376129346/about

check out SCUBA products for cleaning and keeping mould out of the BCD(buoyancy control device) some bcd's are used to be able to breath from in an emergency

jonmitch · 30 April 2011, 15:23

Just to put this to rest, no, a lungful of nitrogen will not harm, less kill you.

At last, I've been able to post on here about something I actually know about. Now would anyone like to know what 10 pints of Cornish Knocker does to your liver?