Mailing List Archive

Mailing List: techdiver

Message Display

Okay, here is something that tickles me.

Suppose a 11m long water-filled vertical pipe, about 1.5-2m
diameter, which is sealed at it's upper end, but whose lower end 
dips slightly below the surface of a pool it is suspended above (so 
the water insice does not pours out).

According to theory, the water column inside will rise to about 10m 
above the level of water, and will be crowned by vacuum (but in 
reality, by water vapour at less than 1/10 ATA).

Suppose that an AIR BREATHING  diver would ascend such a tube; how 
high will the diver be able to go before doing a decompression stop? 
Haldanian theory would suggest 5 meters (1/2 ATA). How long would 
that deco stop be? Would the second stop be at 7.5 meters?

Now, suppose that our diver is not only on PURE OXYGEN, but has been 
breathing pure O2 for a while before diving, to purge his body of 
nitrogen, how high the diver would be able to ascend up the tube 
before his O2 pressure (no longer partial...) becomes to low to 
sustain him?

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]