|Role||Tip jet research helicopter|
|Designer||Frederich von Doblhoff|
The Doblhoff/WNF 342 was the first helicopter to take off and land using Tip jets to drive the rotor.
Development[edit | edit source]
The WNF-342 was designed for a German Navy requirement for an observation platform for use from small ships and submarines.
The conventional piston engine drove both a small propeller (to provide airflow across a rudder) and an air compressor to provide air (subsequently mixed with fuel) through the rotor head and hollow rotor blades to a combustion chamber at the rotor tips. As a research helicopter it was a simple design to allow modification.
Variants[edit | edit source]
V1/V2: The first helicopter was initially powered by a 60 horsepower (45 kW) engine (V1) and then a 90 horsepower (67 kW) engine (V2)—both by Walter Mikron. It first flew in 1943, and was captured with V4 at Zell am See.
V3: The second WNF 342 had a larger rotor and was destroyed during testing.
V4: The last unit produced was a two-seat variant with new collective and cyclic controls.[Clarification needed]
After 25 flight hours it was captured by United States forces and on July 19, 1945, shipped to the US under Operation Lusty on the HMS Reaper (D82).
Aircraft on display[edit | edit source]
- V4 is held by the Smithsonian Institution in the United States.
Specifications (V4)[edit | edit source]
Data from Illustrated Encyclopedia of Aircraft
- Crew: 2
- Main rotor diameter: 10.00 m (32 ft 9¾ in)
- Main rotor area: 78.54 m2 (845.42 ft2)
- Empty weight: 430 kg (948 lb)
- Gross weight: 640 kg (1411 lb)
- Powerplant: 1 × BMW-Bramo Sh.14A radial piston engine, 104 kW (140 hp) each
- Maximum speed: 48 km/h (30 mph)
See also[edit | edit source]
- List of helicopters
References[edit | edit source]
- "Doblhoff". Hubschrauber Museum. http://www.hubschraubermuseum.de/archives/manufacturers/doblhoff. Retrieved 2009-08-15.
- Orbis 1985, pp. 1454–1455
- Apostolo, Giorgio. The Illustrated Encyclopedia of Helicopters, pp. 18, 126. Bonanza Books, New York, 1984. ISBN 0-517-43935-2.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
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