Orbiter Interface With Payload Data Systems ................................. 4-57 Data Record/Playback Systems Two.

GROSS LANDING WEIGHT........ VARIABLE INERT WEIGHT (APPROX) ........ 74 844 kg (165 000 LB) MINIMUM GROUND CLEARANCES BODY FLAP Ex cen ELEVONS NOSE LANDING GEAR UPLOCK ACTUATOR NOSE LANDING GEAR NOSE WHEEL ACTUATORS STEERING MAIN LANDING GEAR AND ACTUATOR NOSE LANDING GEAR VALVES FOUR-CHANNEL SERVOACTUATORS.