No, it sounds like they're using liquid helium to cool it. But your idea sounds ... | Hacker News

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tocomment on April 27, 2012 | parent | context | favorite | on: Skylon: A British dream of space

No, it sounds like they're using liquid helium to cool it. But your idea sounds like it's worth trying.

dasmoth on April 27, 2012 [–]

The helium is just a recirculating coolant.

In the test rig, it's being cooled by boil-off of LN2. In a flight configuration, using cryogenic propellants as a heat dump seems logical.

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