OVERVIEW Aerojet Rocketdyne (formerly Aerojet) was contracted to design and test a new booster for NASA’s Space Launch Initiative. One engine design was the Co-Optimized Booster for Reusable Applications (COBRA), a liquid hydrogen/liquid oxygen engine designed to fire with 600,000 pounds of thrust. ATA Engineering, Inc., supported Aerojet Rocketdyne in the development of engine sine, random, and transient self-induced forcing functions using new methods based on the Space Shuttle Main Engine (SSME) data. Engine responses (maximum static and dynamic structural loads) were recovered for ground handling, startup/shutdown, and steady-state engine phases and provided important loads information to support design iterations. TASKS PERFORMED & KEY OUTCOMES h Developed a system finite eleme

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