13 MORE Things That Saved Apollo 13, part 7: Isolating the Surge Tank
Schematics of the Apollo command module interior. The surge tank was located in the left hand intermediate equipment bay. Credit: NASA.
Join Universe Today in celebrating the 45th anniversary of Apollo 13 with insights from NASA engineer Jerry Woodfill as we discuss various turning points in the mission.
Within minutes of the accident during the Apollo 13 mission, it became clear that Oxygen Tank 2 in the Service Module had failed. Then Mission Control radioed up procedures and several attempts were made to try to save the remaining oxygen in Tank 1. But the pressure readings continued to fall, and it soon became obvious that Tank 1 was going to fail as well. At that point, both the crew and those in Houston realized the extreme seriousness of the situation.
No oxygen meant the fuel cells would be inoperative, and the fuel cells produced electrical power, water and oxygen – three things vital to the lives of the crew and the life of the spacecraft.
For power in the Command Module, all that was left were the batteries, but they were to be the sole source of power available for reentry. Besides the ambient air in the CM, the only oxygen remaining was contained in a so called ‘surge tank’ and three reserve one pound O2 tanks. These, too, were also mainly reserved for reentry, but they were automatically tapped in emergencies if there any oxygen fluctuations in the system.
In Chris Kraft’s autobiography Flight: My Life in Mission Control, the former flight director and former director of Johnson Space Center cited Gene Kranz’ decision to immediately isolate or seal off the surge tank as being one of the things that made rescuing the crew possible.
Why was it so essential to assure that the spare oxygen surge tank in the CM was protected?
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Read the rest of 13 MORE Things That Saved Apollo 13, part 7: Isolating the Surge Tank (1,027 words)
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Post tags: Apollo, Apollo 13, Chris Kraft, Gene Kranz, Jerry Woodfill, mission control, surge tank, Sy Liebergot
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Source: http://www.universetoday.com/119946/13-more-things-that-saved-apollo-13-part-7-isolating-the-surge-tank/
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