Chrysler SERV
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SERV, short for Single-stage Earth-orbital Reusable Vehicle, was a proposed space launch system designed by Chrysler's Space Division for the Space Shuttle project. SERV was radically different from the two-stage spaceplanes that almost every other competitor entered into the Shuttle development process and was never given serious consideration for the shuttle program.
SERV was to be a single-stage to orbit spacecraft that would take off from the existing Saturn V complexes and land vertically at Kennedy for re-use. SERV looked like a greatly expanded Apollo capsule, with an empty central core able to carry 125,000 lb (57,000 kg) of cargo. SERV could be launched uncrewed for cargo missions, ejecting a cargo capsule and returning to Earth. For crewed missions, a separate spaceplane, MURP (Manned Upper-stage Reusable Payload), could be carried atop the vehicle.
The name "SERV" was also used by an entirely unrelated NASA project, the "Space Emergency Re-entry Vehicle".