![]() ![]() In the end, Hughes won the competition and the Army awarded a contract for production in May 1965. Army at Fort Rucker, Alabama to compete against the other 10 prototype aircraft submitted by Bell and Fairchild-Hiller. Five prototypes were built, each fitted with a 252 shp (188 kW) Allison T63-A-5A engine, and delivered to the U.S. Originally designated the YHO-6A under the army's designation system, the aircraft was redesignated the YOH-6A under the Department of Defense's new joint system in 1962. The first Model 369 prototype flew on 27 February 1963. Two designs, those submitted by Fairchild-Hiller and Bell, were selected as finalists by the Army-Navy design competition board, but the Army later included the helicopter from Hughes as well. Twelve companies took part in the competition and Hughes Tool Company's Aircraft Division submitted the Model 369. ![]() Army issued Technical Specification 153 for a Light Observation Helicopter (LOH) that could perform personnel transport, escort and attack missions, casualty evacuation, and observation. The OH-6 was started in 1960, when the U.S. US Army Rangers on exercise using an MH-6 ![]()
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