The Model 385 was designed and built under a United States Army research contract to prove a concept known as hot-cycle propulsion. The helicopter was given the military designation XV-9A with the serial number 64-15107. Two General Electric YT64-GE-6 turbojets were used as gas generators, the jet efflux was ducted to nozzles at the blade tips. The rotor blades also had cooling ducts in both the leading and trailing edges. To keep costs to a minimum the cockpit with two side-by-side seats of an OH-6A was used and the landing gear was from a Sikorsky H-34.
Operational serviceedit
The helicopter first flew on November 5, 1964. After test flight at Hughes facility at Culver City, California, the XV-9A was transferred to Edwards Air Force Base for further tests. The tests were satisfactory and the company was confident that the hot-cycle system would be widely used, although the XV-9A was noisy and had a high fuel consumption. The company was unable to mitigate the problems and the development by Hughes of pressure-jet systems did not proceed. The Army tests were completed in August 1965 and the helicopter was returned to Hughes.
Variantsedit
XV-9A
United States military designation for the Hughes Model 385, one built.
Harding, Stephen (1990). U.S. Army Aircraft Since 1947. Shrewsbury, UK: Airlife Publishing. ISBN1-85310-102-8.
The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
March 17, 2024
hughes, company, designation, hughes, model, 1960s, american, high, speed, research, helicopter, built, hughes, helicopters, 9the, during, test, flightrole, experimental, helicoptermanufacturer, hughes, helicoptersfirst, flight, november, 1964retired, 1965stat. The Hughes XV 9 company designation Hughes Model 385 was a 1960s American high speed research helicopter built by Hughes Helicopters XV 9The XV 9A during a test flightRole Experimental helicopterManufacturer Hughes HelicoptersFirst flight 5 November 1964Retired 1965Status RetiredNumber built 1 Contents 1 Design and development 2 Operational service 3 Variants 4 Specifications XV 9A 5 See also 6 ReferencesDesign and development editThe Model 385 was designed and built under a United States Army research contract to prove a concept known as hot cycle propulsion The helicopter was given the military designation XV 9A with the serial number 64 15107 Two General Electric YT64 GE 6 turbojets were used as gas generators the jet efflux was ducted to nozzles at the blade tips The rotor blades also had cooling ducts in both the leading and trailing edges To keep costs to a minimum the cockpit with two side by side seats of an OH 6A was used and the landing gear was from a Sikorsky H 34 Operational service editThe helicopter first flew on November 5 1964 After test flight at Hughes facility at Culver City California the XV 9A was transferred to Edwards Air Force Base for further tests The tests were satisfactory and the company was confident that the hot cycle system would be widely used although the XV 9A was noisy and had a high fuel consumption The company was unable to mitigate the problems and the development by Hughes of pressure jet systems did not proceed The Army tests were completed in August 1965 and the helicopter was returned to Hughes Variants editXV 9A United States military designation for the Hughes Model 385 one built Specifications XV 9A edit nbsp Detail of the bladetip diffuserData from U S Army Aircraft Since 1947 1 General characteristicsCrew Two Length 45 ft 0 in 13 72 m Height 12 ft 0 in 3 66 m Empty weight 8 500 lb 3 864 kg Gross weight 15 300 lb 6 955 kg Powerplant 2 General Electric YT64 GE 6 gas turbine 2 850 hp 2 126 kW each Main rotor diameter 55 ft 0 in 16 76 m Main rotor area 2 376 sq ft 220 6 m2 Performance Maximum speed 173 mph 279 km h 150 kn Cruise speed 150 mph 242 km h 130 kn Range 165 mi 266 km 143 nmi Service ceiling 11 500 ft 3 505 m See also editHughes XH 17 a much larger test of the rotor concept Tip jetReferences edit nbsp Wikimedia Commons has media related to Hughes XV 9 Harding 1990 p 151 Harding Stephen 1990 U S Army Aircraft Since 1947 Shrewsbury UK Airlife Publishing ISBN 1 85310 102 8 The Illustrated Encyclopedia of Aircraft Part Work 1982 1985 Orbis Publishing Retrieved from https en wikipedia org w index php title Hughes XV 9 amp oldid 1168089324, wikipedia, wiki, book, books, library,
