Martin XMS-1 Original Dyna-Soar configuration

In 1945, millions of German military documents were confiscated by USAAF. One of the concept was the Sanger aerospace bomber. During post-war years, Bell was selected for further studies on rocket-bomber which named BoMi. In 1956, the USAF channeled Bell's development to a reconnaissance, bombardment vehicle. A competition for a prototype was opened. In 1959, Boeing won the competition, and was contracted for the system contractor, Martin as responsibility for the booster airframe. The project designated XMS-1 (Experimental Manned Spacecraft), the name Dyna-Soar (Dynamic Soaring) also became official. The program was structured in 3-steps. Step-1 was a manned glider that propelled by Titan I or II booster, step-2 was a manned orbital flight and step-3 was a weapon system research. In 1961, plans were changed to develop a vehicle capable of exploring man's military functions in space, that were to adapt the glider to a expensive Titan IIIC booster. Although the mock-up was inspected and accepted, the whole program was cancelled by Secretary of Defense in 1963.