Polaris will build a two-stage, horizontal take-off and fully reusable hypersonic research vehicle, featuring a linear aerospike rocket engine. German company Polaris Spaceplanes announced on Jan. 27, 2026, that it has received a contract from the Federal Office of Bundeswehr Equipment, Information Technology, and In-Service Support (BAAINBw) to build and flight-test a reusable hypersonic vehicle. […]