Doak VZ-4 | |
---|---|
Role | VTOL research convertiplane |
Manufacturer | Doak Aircraft Company |
First flight | 25 February 1958[1] |
Status | preserved at Fort Eustis VA |
Primary user | United States Army |
Number built | 1 |
The Doak VZ-4 (or Doak Model 16) was an American prototype VTOL aircraft built in the 1950s for service in the United States Army.
Development[]
The aircraft was originally powered by an 840 shp (630 kW) Lycoming YT53 turboprop engine. It was replaced with a 1,000 shp (750 kW) Lycoming T53-L-1 turbine.[2] The turbine engine is mounted in the fuselage driving two wing-tip mounted tilting ducted fan propellers. Only one aircraft was produced. Given serial number 56-6942, it is on display at the U.S. Army Transportation Museum located at Fort Eustis, Virginia.
Operators[]
- USA
- NASA
- United States Army
Specifications[]
Data from The Illustrated Encyclopedia of Aircraft[3]
General characteristics
- Crew: 2
- Length: 32 ft 0 in (9.75 m)
- Wingspan: 25 ft 6 in (7.77 m)
- Height: 10 ft 0 in (3.05 m)
- Wing area: 96 ft2 (8.92 m2)
- Empty weight: 2,300 lb (1043 kg)
- Gross weight: 3,200 lb (1451 kg)
- Powerplant: 1 × Avco Lycoming YT-53 turboshaft, 840 hp (626 kW)
Performance
- Maximum speed: 230 mph (370 km/h)
- Range: 230 miles (370 km)
- Service ceiling: 6000 ft (1830 m)
See also[]
References[]
- Notes
- ↑ Swanborough and Bowers 1963, p. 583.
- ↑ Harding, Stephen. U.S. Army Aircraft Since 1947. Shrewsbury, UK: Airlife Publishing, Ltd., 1990. ISBN 1-85310-102-8.
- ↑ The Illustrated Encyclopedia of Aircraft 1985, p. 1454.
- Bibliography
- The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985). London: Orbis Publishing, 1985.
- Swanborough, F.G. and Peter M. Bowers. United States Military Aircraft since 1909. London: Putnam, 1963.
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The original article can be found at Doak VZ-4 and the edit history here.