Posted by Paul Bowers on
URL: https://www.shado-forum.com/UFO-Space-Suit-question-tp1491104p1491112.html

Theresa replied:

| Actually, I meant 5 PSI as the *suit* pressure (as was used in
the US
| Gemini and Apollo spacesuits). Now figure 54L 1800 PSIG of pure
oxygen
| regulated to 5 PSI suit pressure and breathed off at that
pressure.
| Anyone care to venture a guess? I'll try do do some figuring
after
| work.


My misunderstanding. D'oh!


| By comparison, my SCUBA tanks are 80 cu. ft. aluminum, rated at
3000
| PSIG. The difference is that I breathe off the air at anywhere
from 1
| to 4 atm depending upon my depth. I can stay down approx an hour
& 1/2
| in shallow water (~20 ft) using about 1500-2000 PSIG of the air
in the
| tank (depending on exertion). But my tanks are huge, as compared
to
| me. With a tank on my back I cannot sit down because the tank is
| significantly longer than my torso (I'm 5'2"). But I
digress.....


Uh-oh, there's only 1.9 FT^3 (0.44 litres water volume) in one of
those minitanks I described and 1 litre of liquid oxygen provides
~30.4 SCF of gas when vaporized.

I probably flubbed a calc along the way and I think I feel a math
headache coming along ...

Paul