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  Mercury - Gemini - Apollo
  Mercury, Gemini cabin atmosphere for ground tests

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Author Topic:   Mercury, Gemini cabin atmosphere for ground tests
Paul78zephyr
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Posts: 678
From: Hudson, MA
Registered: Jul 2005

posted 07-19-2013 11:32 AM     Click Here to See the Profile for Paul78zephyr     Edit/Delete Message   Reply w/Quote
What was the cabin atmosphere used in the Mercury and Gemini capsules during manned ground tests? 100 percent oxygen? 16 psi?

Lou Chinal
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Posts: 1332
From: Staten Island, NY
Registered: Jun 2007

posted 07-19-2013 02:39 PM     Click Here to See the Profile for Lou Chinal   Click Here to Email Lou Chinal     Edit/Delete Message   Reply w/Quote
As far as I know, 100% 02.

Fra Mauro
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Posts: 1624
From: Bethpage, N.Y.
Registered: Jul 2002

posted 07-20-2013 12:49 PM     Click Here to See the Profile for Fra Mauro   Click Here to Email Fra Mauro     Edit/Delete Message   Reply w/Quote
I've read that as well.

Rick Mulheirn
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Posts: 4208
From: England
Registered: Feb 2001

posted 07-20-2013 02:54 PM     Click Here to See the Profile for Rick Mulheirn   Click Here to Email Rick Mulheirn     Edit/Delete Message   Reply w/Quote
It is my understanding cabin pressure was 16 psi... on Gemini at least.

While researching an article on Apollo 1, I recall reading about a similar electrical ground test fault on the Gemini 8 spacecraft. The fault however occurred in wiring outside the inner pressure vessel.

Had it occurred inside the cabin Armstrong may not have been the first to walk on the moon.

Joel Katzowitz
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Posts: 811
From: Marietta GA USA
Registered: Dec 1999

posted 07-20-2013 03:35 PM     Click Here to See the Profile for Joel Katzowitz   Click Here to Email Joel Katzowitz     Edit/Delete Message   Reply w/Quote
I believe the 16 psi was only used for leak checks. I believe the normal atmosphere was 100% O2 at 3 to 5 psi.

Lou Chinal
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Posts: 1332
From: Staten Island, NY
Registered: Jun 2007

posted 07-20-2013 06:25 PM     Click Here to See the Profile for Lou Chinal   Click Here to Email Lou Chinal     Edit/Delete Message   Reply w/Quote
I thought the question was about ground tests.

As far as, was anybody inside of Mercury / Gemini for the ground tests? I don't know.

Remember the Apollo vacuum chamber had not been built yet.

This leads back to Grissom. Did anybody ever blow the hatch from the inside during training? Somebody must have before the flight of MR-4.

How I wish Guenter Wendt was still with us.

All times are CT (US)

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