Engineering:Landgraf H-2
| H-2 | |
|---|---|
| Role | Single-seat twin-rotor helicopter |
| Manufacturer | Landgraf Helicopter Company |
| Designer | Fred Landgraf |
| First flight | 2 November 1944 |
| Number built | 1 |
The Landgraf H-2 was an American single-seat twin-rotor helicopter designed by Fred Landgraf and built by the Landgraf Helicopter Company of Los Angeles, California. Although awarded a development contract by the United States Army, it was not developed and was overtaken by more advanced designs.
Design and development
Fred Landgraf formed the Landgraf Helicopter Company in September 1943 to develop and manufacture the H-2. It had an enclosed structure for one pilot and an 85 hp (63 kW) radial engine driving two rotors, each rotor fitted to a short boom on each side of the fuselage. It had a fixed tricycle landing gear. The H-2 first flew on 2 November 1944 and the company was awarded a development contract by the United States Army. It was not developed or bought and the company ceased operations by the end of the 1940s.
Unlike conventional helicopters, the H-2 used a tension-rod drive system to drive the side-by-side rotors.[1] Control of blade pitch was also unconventional, with the blade shells rotating freely about the spars, controlled by ailerons near the tips.[2]
Specifications
Data from [3]
General characteristics
- Crew: one
- Capacity: 186 lb (84 kg)
- Length: 15 ft (4.6 m) fuselage only
- Wingspan: 12 ft 2 in (3.7 m) outrigger wings
- Width: 29 ft 10 in (9.1 m) including rotors
- Powerplant: 1 × Pobjoy R 7-cyl. air-cooled radial piston engine, 85 hp (63 kW)
- Main rotor diameter: 2× 18 ft 1 in (5.5 m)
Performance
- Maximum speed: 100 mph (160 km/h, 87 kn)
See also
Aircraft of comparable role, configuration and era
Related lists
References
- ↑ ALLWARD, MAURICE F. (14 October 1948). "Tie-Rod Transmission". Flight: 458. http://www.flightglobal.com/pdfarchive/view/1948/1948%20-%201714.html. Retrieved 25 November 2014.
- ↑ "Landgraf Model H-2". https://sites.google.com/site/stingrayslistofrotorcraft/landgraf-model-h-2.
- ↑ Eckland, K.O. (2008-08-15). "American airplanes: La - Li". Aerofiles.com. http://aerofiles.com/_la.html.
Bibliography
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985). Orbis Publishing. pp. 2280.
External links
- PCAM (June 2013), Of Fleets, Luscombes, and a Plywood Helicopter, XVIII, Pacific Coast Air Museum, pp. 2–3, http://pacificcoastairmuseum.org/files/newsletters/newsletters2013/2013-June-Straight-Scoop.pdf
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