Apollo 13

Essay specific features

 

Issue:

History

 

Written by:

Russell H

 

Date added:

July 4, 2015

 

Level:

College

 

Grade:

A

 

No of pages / words:

1 / 198

 

Was viewed:

1648 times

 

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Essay content:

However, the oscillations caused a sensor to register excessively low average pressure, and the computer shut the engine down automatically.[7] Smaller pogo oscillations had been seen on previous Apollo missions (and had been recognized as a potential problem from the earliest unmanned Titan-Gemini flights), but on Apollo 13 they had been amplified by an unexpected interaction with the cavitation in the turbo-pumps...
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Those modifications solved the problem. They entailed (a) the addition of a helium gas reservoir in the center engine’s liquid oxygen line to dampen pressure oscillations, (b) an automatic cutoff for the center engine in case this failed, and (c) simplified propellant valves on all five second-stage engines...
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