Reaction Control System (RCS) Each RCS consists of high-pressure gaseous helium storage tanks, pressure regulation and relief systems, a fuel and oxidizer tank, a system that distributes propellant to its engines, and thermal control systems (electrical heaters). Forward RCS units provide the thrust for attitude (rotational) maneuvers (pitch, yaw and roll) and for small velocity changes along the orbiter axis (translation maneuvers).

STEVEN F. UDVAR-HAZY CENTER
NATIONAL AIR AND SPACE MUSEUM
Chantilly, VA

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