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To 315° C or 6000* F). IGNITERS m -—— MAIN INJECTOR OXIDIZER PREBURNER VALVE 8 — FUEL PREBURNER ШЕ HIGH-PRESSURE HYDROGEN TURBOPUMP Figure 2-4.—SSME powerhead component arrangement. 2-8 Tu: is AU tll 7 AAA MAIN COMBUSTION CHAMBER су = COOLANT INLET MANIFOLD The stacked tube nozzle subassembly. The forward skirt assembly. The Orbiter midbody umbilical unit, hypergolic umbilical system for execution. The keyboard.