Rotating Service Structure for the Space Shuttle

Here is the Rotating Service Structure moved into place around Orbiter Endeavour OV-105. The RSS provided protected access to the shuttle for changeout and servicing of payloads at the pad. The structure was supported by a rotating bridge that pivoted about a vertical axis on the west side of the pad's flame trench. The RSS rotated through 120 degrees on a radius of 160 feet. Support for the outer end of the bridge was provided by two eight-wheel, motor-driven trucks that move along circular twin rails installed flush with the pad surface. The track crossed the flame trench on a permanent bridge. #spaceshuttle #nasa #boneyardsafari #aviationsafari