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.
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