UA120

All versions of UA120 shared a common design, with the only significant differentiating factor being the length of the motor.

[4] Solid fueled separation rockets, used to jettison the spent boosters, were affixed at the top and bottom of the stage.

[4] Thrust-termination capability, necessary for crewed rockets such as the Space Shuttle or Manned Orbiting Laboratory, was to be provided by two pyrotechnically triggered ports on the forward closure, which when opened would allow for the non-propulsive venting of exhaust gasses.

The aft end contained additional separation rockets, the nozzle, and a heat shield.

[8][2] It was proposed for several other variants of Titan III and IV, as well as the Titan-IIIM, derivatives of the Saturn rocket family and the Space Shuttle.