ET RANGE SAFETY SYSTEM...

SPACE SHUTTLE COORDINATE SYSTEM

SPACE SHUTTLE COORDINATE SYSTEM

The space shuttle coordinate reference system is a means of locating specific points on the shuttle. The system is measured in inches and decimal places; Xo designates the longitudinal (forward and aft) axis, Yo the lateral (inboard and outboard) axis and Z o the vertical (up and down) axis. The subscript ''o'' indicates orbiter; similar reference systems are used for the external tank (T), solid rocket booster (B), and overall space shuttle system (S).

In each coordinate system, the X-axis zero point is located forward of the nose tip; that is, the < A HREF = "sts_asm.html#sts_ov">orbiter nose tip location is 236 inches aft of the zero point (at X o 236), the external tank nose cap tip location is at XT 322.5, and the solid rocket booster nose tip location is at XB 200. In the orbiter, the horizontal X o , Y o reference plane is located at Z o 400, which is 336.5 inches above the external tank horizontal XT , YT reference plane located at ZT 400. The solid rocket booster horizontal XB , YB reference plane is located at Z B 0 and coincident with the external tank horizontal plane at ZT 400. The solid rocket booster vertical XB , ZT planes are located at + Y S 250.5 and -YS 250.5. Also, the orbiter, external tank, and shuttle system center X, Z planes coincide.

From the X = 0 point, aft is positive and forward is negative for all coordinate systems. Looking forward, each shuttle element Y-axis point right of the center plane (starboard) is positive and each Y-axis point left of center (port) is negative. The Z axis of each point within all elements of the shuttle except the SRBs is positive, with Z = 0 located below the element. In the SRBs each Z-coordinate point below the XB , YB reference plane is negative and each point above that plane is positive.

The shuttle system and shuttle element coordinate systems are related as follows: the external tank XT 0 point coincides with XS 0, the SRB XB 0 point is located 543 inches aft, and the Yo , Zo reference plane is 741 inches aft of X S 0.

ORBITER STRUCTURE

FORWARD FUSELAGE

CREW COMPARTMENT

AIRLOCK

FORWARD FUSELAGE AND CABIN WINDOWS

WING

MIDFUSELAGE

PAYLOAD BAY DOORS

AFT FUSELAGE

OMS/RCS PODS

BODY FLAP

VERTICAL TAIL

ORBITER PASSIVE THERMAL CONTROL

ORBITER PURGE, VENT AND DRAIN SYSTEM