Questions tagged [apollo-13]

Questions regarding Apollo 13 which is launched as a part of American Apollo space program by Saturn v from Kennedy Space Center in April 11, 1970 carrying three crew members but lunar landing was aborted because of rapture of oxygen tank and few technical problems after injection to orbit

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22
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3answers
6k views

Why would oxygen be stored as a super critical fluid?

Organic Marble just answered a question about Apollo 13 in terms of the storage of Oxygen, and posted some fascinating stuff, including the fact that Oxygen was stored as a super-critical fluid. I ...
11
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1answer
821 views

Puzzler: Precisely what maximum distance from the Earth did the Apollo 13 astronauts achieve?

tl;dr: Both this answer and this answer quote Wikipedia to state that the Apollo 13 astronauts reached 404,171 km from Earth. I'm not able to reproduce that value. According to JPL's Horizons the ...
18
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1answer
3k views

Why wasn't the Apollo 13 Service Module jettisoned until hours before reentry?

Looking at the Apollo 13 mission timeline within three hours after the explosion of O2 tank two all oxygen in the SPS was completely depleted. Fuel cells #1 and #3 were off line. CM had even started ...
25
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1answer
5k views

Was the Apollo 13 CM guidance computer fully shut down?

I was watching the movie Apollo 13, and one thing struck me as quite odd. According to Wikipedia, [Movie director Ron] Howard went to great lengths to create a technically accurate movie, employing ...
24
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1answer
3k views

Were the Apollo CO₂ scrubber canister designs unified after Apollo 13?

After the problem realized when trying to put up three astronauts for an extended stay in the Apollo 13 LEM, namely that the square CM CO₂ scrubbers didn't fit in the LEM's slots, were they redesigned?...
15
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1answer
3k views

Why was the Apollo CM main engine thought to be unreliable on Apollo 13?

When Apollo 13 had most of its internal systems destroyed by an explosion, NASA decided that the best course of action would be to fire the main engine on the dark side of the moon to send the capsule ...
5
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1answer
815 views

What were the uses of the RTGs in the Apollo spacecrafts?

I was listening to the Plutonium episode of "the Elements" on the BBC, and between 07:00 and 08:30 they talked about uses of plutonium such as spacecraft power and heat. While the returning astronauts ...
67
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2answers
8k views

What was Apollo 13's “Little Jolt” after MECO?

Disclaimer: This is a question about the 1995 film Apollo 13; I know Hollywood should always be taken with a moon-sized grain of salt, so the question should read as both "Is this true" and "What was ...
16
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2answers
5k views

What does “stirring tanks” mean?

The Apollo 13 disaster occurred right when the "oxygen tanks were stirred". What does that mean? What benefits does it give? What would happen if they didn't stir the tanks?
13
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1answer
1k views

Did they manufacture six space suits for Apollo astronaut James A. Lovell?

An Apollo astronaut got three space suits, one for training on Earth, one for flight and one as backup. James A. Lovell did fly on Apollo 8 as Command Module pilot and on Apollo 13 as Mission ...
24
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1answer
2k views

Did Apollo 13 “barbecue roll” under the propulsion of the lunar module?

Apollo spacecraft were often put in a "barbecue roll" (officially called passive thermal control mode), which slowly rotated the spacecraft along its main axis. Without this maneuver, one side of the ...
20
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2answers
12k views

Size of Apollo era astronauts

I had read that the early astronauts were all 'short guys'. This made a lot of sense. A short man can have as much stamina and endurance as a large man, yet eat less, consume less oxygen & (...
5
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1answer
816 views

Why did Apollo 13 need to scrub the air in the LM?

One of the dramatic moments of Apollo 13 (in real life, not just the movie) was when they had to build scrubbers for the LM ("fit the square peg in a round hole"). Why did they have to do that? The ...
17
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2answers
5k views

Could an Apollo astronaut have put their foot through the hull of the LEM?

In this interview (part of the extra material from the Apollo 13 film), Tom Kelly of Grumman talks about the construction of the Apollo LEM. In particular he mentions that the "skin" of the LEM was ...
18
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1answer
23k views

At what angle did Apollo 13 need to reenter?

The Apollo missions, like most all missions since, used a heat shield to keep from disintegrating in the atmosphere. This approach had its flaws, however. For one, if your approach was too shallow, ...
15
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1answer
3k views

Could the Apollo 13 crew have survived the CO2 issue using their spacesuits

In the book on the ill-fated Apollo 13 mission there is a chapter that contains an overview of the consumables on board the spacecraft, and whether or not they might pose a problem to the survival of ...
38
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2answers
5k views

Did Apollo 13 produce any scientific results?

Despite an explosion and other setbacks, Apollo 13 landed safely back on Earth on April 17, 1970. Even though the astronauts did not make it to the lunar surface, were any scientific results reported?...
31
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1answer
4k views

Was the Apollo 13 CO2 problem a matter of capacity, or of rate?

During Apollo 13, an explosion in the service module caused the command module to lose electrical power. This required using the environmental control system of the lunar module to remove carbon ...
19
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2answers
2k views

What kept crosswinds from pushing Apollo rockets into their own gantry?

Watching this unnamed Saturn V launch (Apollo 13?), I see the gantries pull away, and the rocket takes 13 seconds to clear the tower. That seems like enough time ...
9
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2answers
546 views

Coordination of RCS on Apollo CSM/LM

The RCS thrusters on the Apollo Service Module were positioned approximately around the center of mass of the ship, such that translational maneuvers wouldn't unnecessarily rotate the ship. While the ...
8
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1answer
1k views

Why didn't the Apollo 13 crew wear their spacesuits in the LM?

In the Apollo 13 movie, the crew take refuge in the Lunar Module, the temperature drops and they suffer the cold in their shirtsleeves. Is this accurate? Is there a reason they couldn't wear their ...
7
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2answers
409 views

Were more lunar module LiOH cartridges just a spacewalk away?

The modularized equipment stowage assembly (MESA) was a drawer in the base of the lunar module descent stage which stored equipment and supplies. The modularized equipment stowage assembly (MESA) ...
4
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2answers
183 views

Why were the openings of the LiOH canisters in Apollo different shapes in the first place?

Many of you probably know the famous "square peg in a round hole" situation on Apollo 13. All three astronauts were in the LM and there was a build up of CO2 from the astronauts exhaling. They had to ...
2
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1answer
167 views

What was the normal function of the (coax?) crosshairs used during the Apollo 13 famous manual burn?

What crosshairs were used to maintain an attitude during the famous manual trajectory correction burn during Apollo 13's return to Earth? What was their normal function? This is all I can hear in the ...