Aapparatus for for purging carbon dioxide from Lunar Module, Apollo 13
Interior
view of the Apollo 13 Lunar Module (LM) showing the "mail box," a
jury-rigged arrangement which the Apollo 13 astronauts built to use the
Command Module (CM) lithium hydroxide canisters to purge carbon dioxide
from the LM. Lithium hydroxide is used to scrub CO2 from the
spacecraft's atmosphere. Since there was a limited amount of lithium
hydroxide in the LM, this arrangement was rigged up to utilize the
canisters from the CM. The "mail box" was designed and tested on the
ground at the Manned Spacecraft Center (MSC) before it was suggested to
the problem-plagued Apollo 13 crew men. Because of the explosion of one
of the oxygen tanks in the Service Module (SM), the three crew men had
to use the LM as a "lifeboat".
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