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To: Calvin Locke
The Apollo era also used a pure oxygen atmosphere. That is what caused severity of the capsule fire in the Apollo 1 test, however that was at a 1 atm internal pressure (14.7 psia, which may not to healthy as well, outside of fire considerations). (Question to freepers who may have worked on Apollo: after the fire did NASA go to an N2/O2 atmosphere in the command module at 14.7 psia, changing to 5 psia pure oxygen somewhere in the flight profile?). I suspect that the ISS has an N2/O2 atmosphere. Could be wrong. Another consideration for the air pressure, since equipment operation was mentioned, is heat conduction, although fans may be needed. Insufficient air density results in less heat carryoff. I have seen power transformers de-rated for high elevation (starting at 4000 feet). Another DUMB question for any aerospace freepers - Can there be convective cooling in a zero-gee enviroment, or are circulation fans needed.
24 posted on 01/09/2004 1:47:32 PM PST by Fred Hayek
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To: Fred Hayek
post 24
Boy this bring back bad memoirs for me---The Apolla was coated with gold on the inside and Project manager ----To protect the Appolla from scraps and bump he coated the inside with a foam type --oil base----and O2---

stupid manager
59 posted on 01/18/2004 9:26:08 AM PST by ralph rotten
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