The Pratt & Whitney and Gencorp Aerojet joint venture, established to support NASA's Space Launch Initiative, has completed testing on the first of three subscale preburners, the fabrication of a 40% milled channel-wall nozzle and prototype engine design reviews for the project. The partners are developing the Co-optimised Booster for Reusable Applications (COBRA) and expander cycle hydrogen-fuelled engines.

Source: Flight International