I suggest you skip to the 2:00 mark...
SKYLON is the successor to Britain's HOTOL spaceplane concept, being developed by Reaction Engines Ltd (REL). It is an unpiloted fully reusable aircraft-like vehicle capable of transporting 12 tonnes of cargo into space and is intended as a replacement for expensive expendable launchers in the commerical market.
Reaction Engines has announced that is has successfully tested the key pre-cooler component of its revolutionary SABRE engine crucial to the development of its SKYLON spaceplane. The company claims that craft equipped with SABRE engines will be able to fly to any destination on Earth in under 4 hours, or travel directly into space.
The SABRE engine is capable of operating either as a jet or a rocket, powering aircraft, Reaction Engines claims, at five times the speed of
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