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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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21
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3answers
5k 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 ...
16
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2answers
4k 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?
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0answers
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Did Apollo 13 CM reach thermal equilibrium when it was powered down?

It was reported that the CM cabin temperature dropped to 43°F. Was that the equilibrium, or would it have gotten colder if it had remained in space longer. If that wasn't equilibrium was there an ...
33
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1answer
5k views

Was Apollo 13 radio blackout on reentry longer than expected?

According to the movie Apollo 13 (1995) the radio blackout on reentry was quite a bit longer than expected. Very dramatic, yes, but: Did that really happen, and if so, why was it so much longer ...
59
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1answer
7k views

Why did the Apollo 13 crew extend the LM landing gear?

From the Apollo 13 radio transcript, as they're going through the Lunar Module activation checklist: 060:58:58 Lousma: Okay. The only item on page 10 is to deploy the landing gear. 060:59:06 ...
62
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2answers
7k 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 ...
20
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3answers
5k views

What happened to Apollo 13 LM descent stage?

I see in the accounts of the Apollo 13 mission that the descent stage engine of the LM were used to propel the joined spacecraft into a return trajectory to earth and that the crew remained in the LM ...
9
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1answer
444 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 ...
8
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1answer
836 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 ...
3
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1answer
100 views

How do you find lunar flyby using Apollo 13 mission report data?

Link to mission report: https://www.hq.nasa.gov/alsj/a13/A13_MissionReport.pdf So Im trying to do analysis on the mission phases of Apollo 13 but my part is to only focus on the flyby part. My ...
6
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1answer
479 views

Did Charlie Duke actually get the measles?

Deke Slayton: Jim, we've got a problem. I got some blood work back from the lab. Charlie Duke has the measles. Jim Lovell: [Unconcerned] So we need a new back-up. Deke Slayton: You'...
6
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1answer
766 views

Was Apollo 13's engine really damaged?

According to this answer, turning on Apollo 13's Service Module Propulsion System was considered risky since ground control ditn't know if it was damages in the explosion Perform a PC+2 hour abort ...
2
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1answer
596 views

Why did Apollo 13 need to scrub their oxygen 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 ...
26
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2answers
7k views

Was a one way trip to the moon considered by the crew of Apollo 13?

I watched the fantastic movie "Apollo 13" recently and there was one scene that stood out as it looked like the crew was considering making a one way trip and landing on the moon. The script goes ...
5
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1answer
615 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 ...
3
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0answers
175 views

Where can I find the amended/improvised checklists for Apollo 13 post-accident?

I have been trying to find this online without too much avail. For my own reference and cross checking, I wanted to know where I could find the emergency checklists and the "made up on the spot" CM ...
13
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1answer
2k views

Did USSR discontinue radio transmissions, relocate ships, to aid the US in response to Apollo 13?

In this article there is following statement by Dr. Ernst Stuhlinger: Let me only remind you of the recent near-tragedy of Apollo 13. When the time of the crucial reentry of the astronauts ...
16
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1answer
2k 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 ...
4
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0answers
268 views

From where is this sequence in the Apollo 13 (movie) extra material showing Gene Kranz?

In the Apollo 13 movie extra material, there are several documentary shots interspersed with commentary about the makings of the movie. I am interested in the sequence beginning at about 29 minutes (...
9
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2answers
466 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 ...
14
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1answer
2k 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 ...
16
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2answers
4k 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 ...
21
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1answer
2k 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?...
16
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1answer
21k 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, ...
24
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1answer
4k 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 ...
19
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2answers
10k 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 & (...
12
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1answer
2k 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 ...
13
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2answers
20k views

“Failure is not an option” is really a quote of flight director Gene Kranz?

"Failure is not an option" is attributed to Gene Kranz, flight director of Gemini, Apollo and Space Shuttle missions. In the movie Apollo 13, Ed Harris says it but IMDB trivia states that it was not ...