Origami in Orbit: Reusable Heat Shield Transforms Spacecraft Reentries — ESA is set to test Pridwen |
A novel origami-based heat shield developed with) support is planned to be tested with an actual atmospheric reentry from space. Named Pridwen, after the legendary shield of King Arthur, this reusable design will spring out before a spacecraft reenters the atmosphere.
Standard ‘ablative’ heat shields remove unwanted heat by having pieces of the shield gradually burn off. Instead of ablation, Pridwen relies on radiation: its high-temperaturefabric has a sufficiently high surface area that the heat flux can spread evenly across it to gradually radiate away. The heat shield has undergone multiple drop tests from as high as 17 km and practiced net captures of test items falling at terminal velocity. The company has developed Pridwen as part of a larger vision of in-orbit manufacturing of high-value goods such as pharmaceuticals, superconductors and super alloys, to be returned to Earth on a routine basis.
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