Helicopters built by McDonnell-Douglas, Hughes, Schweizer

McDonnell XHJD-1 "Whirlaway" 1946 In seeking to find work for his fledgling company, James McDonnell was prepared to consider ... read more ... The diminutive XH-20 "Little Henry" was developed by a team led by Marvin Marks in ... read more ... McDonnell Model 38 / XH-20 "Little Henry" 1947 McDonnell Model 79 "Big Henry" 1952 In 1950, after trials with the XH-20 had been terminated, McDonnell engineers remained convinced that ... read more ... The XH-17 began as a ground test stand for a huge tip-jet-powered rotorsystem. In 1949 ... read more ... Kellett-Hughes XH-17 1952 McDonnell XH-28 1953 - project Development of a large helicopter was begun in January 1951 to meet an Army requirement ... read more ... Design of the Model 78 was started in 1950 in answer to a request for ... read more ... McDonnell Model 78 / XHRH-1 1954 - project McDonnell XV-1 1954 Primarily as a research vehicle, McDonnell designed and built two prototypes of a somewhat complicated ... read more ... The McDonnell Model 86 was the first helicopter specially designed for the Navy vert-rep (vertical ... read more ... McDonnell Model 86 / XHCH-1 1956 McDonnell Model 120 1957 Since 1949 the McDonnell Helicopter Engineering Division had attempted to develop a rotor system capable ... read more ... A market survey carried out in 1955 by the Hughes Tool Company, an American company ... read more ... Hughes Model 269/300 1956 Hughes Model 369 / OH-6A "Cayuse" / MD 500 1963 In 1960, the US Department of Defense issued Technical Specification 153 for a Light Observation ... read more ... Convinced that the use of gas pressure to drive rotors, as used in the XH-17 ... read more ... Hughes Model 385 / XV-9A "Hot Cycle" 1964 McDonnell-Douglas AH-64 "Apache" 1975 The US Army's AAH (Advanced Attack Helicopter) programme is the biggest Western programme of its ... read more ... Seeking to expand its family of civil helicopters by adding a six-seat aircraft to its ... read more ... Hughes 600X 1981 - project Hughes OH-6A NOTAR 1981 OH-6 with enlarged tailboom containing ducted NOTAR thrust tail control system and braced V-tail surfaces ... read more ... Schweizer used the 269 airframe as the basis for its contender in the 1990 Army ... read more ... Schweizer 330 1988 McDonnell-Douglas MD 520N 1990 Production 500N with tailplane and twin fins. Prot. N520NT FF 1 May 1990 ... read more ... The upgrade programme involves bringing the entire US Army fleet of AH-64As up to AH-64D ... read more ... McDonnell-Douglas AH-64D "Longbow Apache" 1991 McDonnell-Douglas AH-64 "Sea Apache" project Studies for a Naval version of the Apache were begun during 1984 and since that ... read more ... Although they ultimately lost the competition, Bell Helicopters and McDonnell Douglas undertook a great deal ... read more ... Bell/McDonnel-Douglas LHX 1991 - project McDonnell-Douglas MD 900 "Explorer" 1992 The MDX/MD Explorer lifted off for the first time on 18 December 1992 at Mesa ... read more ... In November 1994, McDonnell Douglas announced their plans to develop an eight-place version of their ... read more ... McDonnell-Douglas MD 600N 1994