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Re:Getting a charge out of wasted automobile heat by WalterBright on Tuesday February 18, 2025 @12:34AM (#43086399)
Turbo-pumps on rocket engines do an equivalent thing. Exhaust gases can be used to drive a compressor that pumps fuel into the combustion chamber. Other designs have a separate rocket engine whose sole purpose is to drive the turbo pump.

This innovation was key to the success of the V2's rocket engine.

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