Quote:
Originally Posted by JSH
I made housings for the shuttle high-pressure fuel turbopumps at my first job out of school. 71,140 hp shaft horsepower from a pump a little bigger than a Chevy big block.
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That is crazy... a fuel pump that is 71,140 horsepower. It must be moving a swimming pool amount of fuel in a minute or something.
Quote:
Originally Posted by cRiPpLe_rOoStEr
Sure, but it also adds some weight and complexity. Holding compressed air for the engine starters is a whole different matter than having to store enough air to keep an airliner pressurized while cruising only on the electric motors or gliding. Considering some earlier pressurized aircraft had engine-driven compressors instead of resorting to air bleeding from the engine's compressors, maybe an accessory compressor driven by an electric motor shouldn't be so out of question. But anyway, it wouldn't surprise me if an electric motor becomes a viable replacement for both the reduction gear (when applied) and the accessory gearbox of an airliner engine.
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It would be pretty simple to have an inlet on a high pressure surface of the aircraft provide the higher pressure.