Before revision: Polaris Spaceplanes The German startup POLARIS Raumflugzeuge GmbH received a Bundeswehr contract to design and flight test a linear aerospike engine in April 2023.
After revision: Bremen-basedPolaris Spaceplanes The German startup POLARIS Raumflugzeuge GmbH received a Bundeswehr contract to design and flight test a linear aerospike engine in April 2023.