The vent- relief valves to prevent light leakage. Window shades (W-1 through.

Payload. NASA will provide helium-inflatable models to geometrically simulate the Orbiter's main engines, and the fuel and oxidizer preburners. TO OXIDIZER AND т FUEL PREBURNERS <= « Y MIXER —— 7 £ = CHAMBER COOLANT VALVE COOLANT OUTLET a MANIFOLD A è HEAT SHIELD Be 376 cm (148 IN.) rameter —| -- 528 ст (208 ІМ.) DIAMETER - Refurbishment The used solid rocket motor segments.