Landgraf H-2
| {{Infobox aircraft begin
|name= H-2 |image= |caption= }}{{Infobox aircraft type |type=Single-seat twin-rotor helicopter |manufacturer=Landgraf Helicopter Company |designer=Fred Landgraf |first flight=2 November 1944 |introduced= |retired= |status= |primary user= |more users= |produced= |number built=1 |variants with their own articles= }} |
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.{{cite journal|last1=ALLWARD|first1=MAURICE F.|title=Tie-Rod Transmission|journal=Flight|date=14 October 1948|page=458|url=http://www.flightglobal.com/pdfarchive/view/1948/1948%20-%201714.html|access-date=25 November 2014}} Control of blade pitch was also unconventional, with the blade shells rotating freely about the spars, controlled by ailerons near the tips.{{cite web|title=Landgraf Model H-2|url=https://sites.google.com/site/stingrayslistofrotorcraft/landgraf-model-h-2|website=Stingray's List of Rotorcraft|access-date=25 November 2014}}
Specifications
{{Aircraft specs
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|eng1 number=1
|eng1 name=Pobjoy R
|eng1 type=7-cyl. air-cooled radial piston engine
|eng1 hp=85
|rot number=2
|rot dia m=5.5
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See also
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References
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Bibliography
- {{cite book |last= Taylor |first= Michael J. H. |title=Jane's Encyclopedia of Aviation |year=1989 |publisher=Studio Editions |location=London }}
- {{cite book |title= The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985)|publisher= Orbis Publishing|pages= 2280}}
External links
- {{citation|title=Of Fleets, Luscombes, and a Plywood Helicopter|url=http://pacificcoastairmuseum.org/files/newsletters/newsletters2013/2013-June-Straight-Scoop.pdf|author=PCAM|date=June 2013|publisher=Pacific Coast Air Museum|volume=XVIII|number=6|pages=2–3}}
Category:1940s United States military utility aircraft
Category:1940s United States helicopters
Category:Transverse rotor helicopters