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pja
on July 18, 2013
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UK government invests in Sabre air-breathing rocke...
In the tests it's presumably just a continuous flow of pre-cooled liquid nitrogen from a tank & the heated N2 is probably dumped into the environment.
The design for a flight-capable engine is supposed to dump the waste heat into the fuel I believe.
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The design for a flight-capable engine is supposed to dump the waste heat into the fuel I believe.