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Germany Advances Reusable Hypersonic Vehicle Program with Polaris
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The Aviationist
Polaris will build a two-stage, horizontal take-off and fully reusable hypersonic research vehicle, featuring a linear aerospike rocket engine.
The vehicle has been further described as a two-stage, horizontal take-off and fully reusable hypersonic research vehicle, with the size and maximum takeoff weight of a fighter jet.
This will inform the final AURORA reusable hypersonic spaceplane, which the latest BAAINBw contract covers, to deliver payloads into Low Earth Orbit (LEO).
After the fully successful first aerospike flight, MIRA II returned to the airport and landed safely.
In the 1990s, NASA and Lockheed Martin pursued the X-33/VentureStar program as a single-stage-to-orbit (SSTO) vehicle with a linear aerospike rocket.