The Lockheed L-193 Global Jet Transport was a jet airliner design concept designed between 1949 and 1953 with a swept wing and engines mounted at the tail. An airliner version and tanker version were developed. The tanker version was declared the winner by the Air Force in preference to the Boeing KC-135 Stratotanker in an early aerial refueling competition. Since the competing Boeing aircraft was ready to fly first examples that were ordered as an interim measure.
Made by Lockheed.