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Questions tagged [sabre-engine]

Questions relating to the Sabre Engine being developed by Reaction Engines Limited (REL), capable of powered transition from air-breathing to vacuum operation.

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Is the UK's Skylon Project still going forward?

I have read a lot about Skylon which is a single stage to orbit concept space plane with a SABRE engine designed by the UK think tank Reaction Engines limited. However, in recent months it seems like ...
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Roughly how long will the SABRE engine need to switch from air-breathing to closed-cycle?

The SABRE engine is designed to be used on a single-stage-to-orbit type of spaceplane. What sort of delay might occur between shutting down the air-breathing operation and switching to a closed-cycle ...
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How does the Sabre engine's pre-cooler achieve such high performance?

The BBC News article Rolls-Royce and Boeing invest in UK space engine about Reaction Engines Limited (REL) and its Sabre engine states REL is developing what it calls the Sabre engine. This power ...
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Why does the SABRE engine have ramjets?

The SABRE engine is designed to power the Skylon SSTO vehicle. It reduces the amount of oxygen that needs to be carried by cooling and compressing air in the early part of the flight. More hydrogen is ...