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Originally Posted by HarryT
No, it was caused by damaged insulation on wires to a "stirring fan" inside an oxygen tank causing a short-circuit which ignited the insulation, leading to an explosion.
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Huh. I thought they switched a heater element that used a different voltage, and made their batteries run out. I guess I'm getting old.
Edit2: Ah - this is what I was thinking about
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Quote:
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The heater and protection thermostats were originally designed for the Command Module's 28-volt DC bus. The specifications for the heater and thermostat were later changed to allow a 65-volt ground supply, in order to pressurize the tanks more rapidly. Beechcraft, the tank subcontractor, did not upgrade the thermostat to handle the higher voltage.
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