OXFORD, England, July 16 (UPI) -- The British government says it plans to invest $90 million in the development of an air-breathing rocket engine intended for a single-stage-to-orbit spaceplane.
The announcement comes after feasibility testing of essential technology conducted by the European Space Agency. The investment, through the United Kingdom Space Agency, will back technical improvements leading to construction of a prototype Synergistic Air-Breathing Rocket Engine, or SABRE, an ESA release said Tuesday.