Development status of mach 6 turbojet engine in JAXA

This papaer describes the development status and program of Mail 6 turbojet engine as a propulsion system of a future spaceplane. Researches on ATREX-500 engine, which was developed in the Institute of Space and Astronautical Science (ISAS) in cooperation with Ishikawajima-Harima Heavy Industries (IHI) and Kawasaki Heavy Industries (KHI), were initiated in 1988 FY and finished in 2003 FY with large number of outeomes. The hydrogen fueled expander cycle was successfully demonstrated at sea level static condition and desired engine performance was attained Maximum thrust and specific impulse were 4,800 N and 1,500 sec respectively. The ATREX engine test campaign is the first step for realizing hypersonic turbojet engines. As a next step, we started design and fabrication of the flight-model engine with variable geometry inlet and nozzle, which are not installed in the ATREX-500 engine. The flight test is scheduled in 2007 FY, as a part of micro gravity test campaign.