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Author
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Topic: Gemini spacesuit pressure relief valve
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Explorer1
Member Posts: 113
From: Los Angeles, CA, USA
Registered: Apr 2019
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posted 03-11-2020 04:38 PM
   
Where is the air pressure relief valve on the Gemini spacesuit? It is plainly visible on the Mercury and Apollo suits, but not on the Gemini suits.Also, under what circumstances is the pressure relief valve used? |
Jim Behling
Member Posts: 1483
From: Cape Canaveral, FL
Registered: Mar 2010
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posted 03-11-2020 09:12 PM
When the pressure gets too high. |
Explorer1
Member Posts: 113
From: Los Angeles, CA, USA
Registered: Apr 2019
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posted 03-15-2020 12:17 PM
Under what circumstances would the pressure get too high if it is always suppose to be between 3.7 and 5 psi?Also, does anyone know where the relief valve is on the standard Gemini G-4C suits? |
oly
Member Posts: 939
From: Perth, Western Australia
Registered: Apr 2015
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posted 03-15-2020 07:10 PM
The suits leak, they were closed by the use of special zippers, maintaining pressure is more of a challenge than an over-pressure scenario. The suits have an acceptable leak rate that is a limit set whereby the ECS/life support systems can maintain the desired pressure with the suit leakage.There is also a limited amount of ballooning within the design, which acts as a damper for suit pressure fluctuation, but a higher suit loop pressure makes it difficult for the crew member to function because the suit becomes more difficult to flex and bend. The suit loop pressure is maintained by the ECS/life support system, that connects to the suit with an inlet and outlet hose, and the system has pressure control and protection circuits that maintain the desired suit pressure. Disconnecting the suit hose connections results in a suit under pressure, because the suits leak. So if you have been on an EVA and cant squeeze back into your seat because the suit has ballooned, disconnecting the suit from the loop bleeds pressure off the suit via the suit leakage. If you refer to the Gemini systems manuals and schematics you will find the ECS system diagrams that detail the system pressure control and protection loop. |
Explorer1
Member Posts: 113
From: Los Angeles, CA, USA
Registered: Apr 2019
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posted 03-25-2020 11:15 PM
According to early diagrams of the Gemini suits, the relief valve was suppose to be located on the right hip of the suit. But in looking at pictures of actual Gemini suits there is nothing visible on the hip of the suit. Does anyone have any knowledge of where the relief valve was or if there was one? | |
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