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Anonymous
>>170618 It's a small generator (or two, in this case) that provide electrical power to the Shuttle's systems. [snip] Details: In the DGIV architecture the APU master switch connect the start bus (runs at 48V, powered by battery, external power (EPU) or emergency fuel cell) to start the two main generators, which then provide about 10kW @ 96V to the generator bus. The power is then distributed to all the subsystems.
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