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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5
votes
1answer
145 views

What might be the way in which the pre-cooler of the SABRE engine removes water from the inlet air?

In this paper about the SABRE engine, there is the following paragraph (emphasis mine): The water vapour in the atmosphere up to an altitude of around 12 km is a problem for ...
0
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1answer
112 views

Would Sabre make a good first stage engine for a hypothetical 2-stage design?

Sabre is usually described in the context of the Skylon SSTO design but, would it make more sense to use such engines for the first stage of a two stage design? Basically, would the air breathing ...
3
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1answer
165 views

In principle, could the oxygen tanks of an 'air breathing' rocket, be filled during ascent?

(Thinking of SABRE and it's heat exchanger). As I understand it, Skylon would take off with full oxygen tanks. Putting aside engineering difficulties, is there a thermodynamic reason why a hybrid ...
1
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1answer
201 views

Could rockets benefit from Reaction Engine's Air-Breathing Rocket Engine in terms of payload?

While I get that one is a vertically launched rocket and the other is a space plane, is it even wildly possible that there could be a vertical intake version of the SABRE engine? Maybe it can be used ...
10
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2answers
2k views

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 ...
3
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1answer
230 views

Nature of Sabre pre-cooler demonstration test

Inspired by a comment to this question "How does the Sabre engine's pre-cooler achieve such high performance?": the comment was that Reaction Engines have demonstrated that the pre-cooler works on ...
4
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1answer
196 views

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 ...
5
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2answers
2k views

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 ...
9
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1answer
1k views

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 ...
3
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1answer
279 views

How plausible is the Skylon project? [closed]

Skylon is the frontier of launch vehicle research with literally 1 TRL(Technology Readiness Level), and it is more difficult than the Space Shuttle project. The project would cost estimate of 12 ...
2
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0answers
176 views

What are the maintenance benefits of SABRE engine technology for SSTO launchers?

What are the maintenance benefits of the SABRE engine over all the other engines being considered for the propulsion concepts for SSTO Reusable launchers?
24
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1answer
6k views

Why is the SABRE engine curved?

Why is the Reaction Engines Limited SABRE (Synergistic Air-Breathing Rocket Engine) curved along it's length?     Illustration of the SABRE engine with the pre-cooler heat ...
9
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1answer
413 views

Any other countries/companies doing anything similar to British Skylon SSTO?

I was reading about the British Skylon SSTO (Single Stage To Orbit) vehicle and its SABRE engine described in Wikipedia. The engine technology looks remarkable, if not revolutionary. Is this a unique ...