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Space Shuttle Main Engine (SSME) Oxygen Flow Control Valve, measuring approximately 9.5˝ x 3˝ x 6˝, marked on the body: "Valve, Oxygen, Pressurant Flow Co[n]trol Type II," with further contract and identification numbers below. Mounted on a wooden 16.5˝ x 12.5 plaque, with a framed image honoring the career of "Phillip E. Cota, Jr., NASA Space Shuttle Orbiter Main Propulsion Subsystem Manager." The Space Shuttle Main Engine (SSME) was a reusable liquid-fueled rocket engine that powered the shuttle during launch, burning liquid hydrogen and liquid oxygen propellants. It was one of the most advanced rocket engines ever built, designed for high efficiency, precise throttle control, and multiple restarts.
