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Results tagged with spacesuits
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user 15906
Questions regarding the spacesuits that astronauts wear whilst in space
16
votes
Why aren't spacecraft and spacesuits pressurised to 2.5 psi (17 kPa) of pure oxygen?
A mix of 79 % nitrogen and 21 % oxygen at a pressure of 1 atm, 14.7 psi or 1.01 bar is more fireproof than pure oxygen at a pressure of 0.21 atm, 3.087 psi or 0.212 bar. The partial pressure of oxygen …
- 49.5k
3
votes
How long can astronauts wearing Dragon capsule suits walk around unconnected to water coolers?
The human body contains 50 to 70 % of its mass of water. Lets assume an astronaut of 80 kg with 50 kg water.
How much heat energy is needed to raise the body temperature by only 0.5 °C? The energy to …
- 49.5k
16
votes
In simple terms, how does the way space suits manage breathable gas differ from how scuba ge...
As a scuba diver I got some remarks.
A space suit is designed as a closed system with constant pressure. Exhaled oxygen is reused and the exhaled carbon dioxide is scrubbed. Only the oxygen used by th …
- 49.5k
18
votes
Accepted
Would've the CO2 scrubbers failed before the O2 supply ran out during an Apollo moonwalk?
We have some data about the Apollo Space Suit from https://www.hq.nasa.gov/alsj/ALSJ-FlightPLSS.pdf
The Apollo Portable Life Support System By Kenneth S. Thomas :
O2 Storage Quantity 1.0 lbs
LiOH Qu …
- 49.5k
2
votes
Accepted
Atmosphere inside a space capsule and need for spacesuits
The Apollo astronauts only wore their suits for a short time after launch. After they left the Earth orbit, they doffed the space suits.
When the two astronauts prepared for Moon landing, they donned …
- 49.5k
3
votes
Can the Valsalva maneuver or nose-scratching be done inside a SpaceX suit helmet?
As long as air pressure is constant or decreasing a Valsalva maneuver is not needed.
Experienced divers know other methods to equalize their ears without closing their nose by hand when they descend i …
- 49.5k
5
votes
Could a spacesuit similar to the suit of Felix Baumgartner be used on the Moon and Mars?
A space suit worn on the Moon needs a system for removal of heat produced by the body of the wearer. A system that works in a vacuum without air around it. The suits also had a micro meteroite protect …
- 49.5k
5
votes
Accepted
Why aren't the hose connectors on Sokol suits color-coded?
The Sokol suit does not use a hose for gas inlet and another for outlet. There is no outlet hose.
Gas exhaust flows through the blue pressure relief valve at the centre of the chest; this valve also …
- 49.5k
19
votes
Accepted
Why did the hose connectors on Apollo spacesuits come in pairs?
From History of the Apollo Space Suit by the International Latex Corporation (ILC). PDF
When setting up the suits in preparation for the extravehicular walk
on the lunar surface, the astronauts …
- 49.5k
3
votes
Accepted
What spacesuits did the Apollo astronauts wear on Earth in their training for the Moon?
From Smithsonian museum web page.
This spacesuit was worn by astronaut Alan Shepard, and was used for
training purposes prior to the Apollo 14 mission in January/February
1971.
Training s …
- 49.5k
7
votes
Accepted
How are Rotating Joints in a Spacesuit Gas-tight?
One of several solutions is the use of O-ring seals. A seal does not need to be perfect gas-tight. As long as the leak rate of the suit is small compared to the oxygen consumption of the astronaut it …
- 49.5k
39
votes
Accepted
What are the Advantages of having a Double-pane Space Helmet?
The outer pane is just a replaceable protection of the inner pane against scratches, dirt, and abrasion.
The helmet on the suits for Artemis missions will also feature a
quick-swap protective vi …
- 49.5k
0
votes
Could a pressure suit be used for a short emergency EVA?
An air tank would not help for a suit filled with pure oxygen. The suit is a closed loop breathing system, a carbon dioxide scrubber is more important than an oxygen tank. But the exhaled gas shouled …
- 49.5k
6
votes
Accepted
What joints of Apollo 17 space suits did moon dust get into, making the astronauts arms diff...
There are no joints to be seen within the arms assembley, only fabric.
But at the lower end of the arm there is the wrist ring.
This ring is used for a gas tight connection of the gloves to the …
- 49.5k
3
votes
Spacesuit needed for 1 psi 100% methane atmosphere - 60 Fahrenheit?
A pressurized space suit is needed when the atmospheric pressure is lower than about 0.3 to 0.4 bar. Pure oxygen is breathed within the suit. So for about 0.07 bar a pressurized suit is mandatory.
Bu …
- 49.5k