avia.wikisort.org - Helicopter
The Doblhoff/WNF 342 was the first helicopter to take off and land using tip jets to drive the rotor.
| Doblhoff/WNF 342 | |
|---|---|
 | |
| Doblhoff WNF 342 V4 model in the Hubschraubermuseum Bückeburg (Helicopter Museum Bückeburg) | |
| Role | Tip jet research helicopter |
| National origin | Austria |
| Manufacturer | Wiener-Neustädter Flugzeugwerke |
| Designer | Friedrich von Doblhoff |
| First flight | 1943 |
| Number built | 3 |
Development
The WNF 342 was designed for a German Navy requirement for an observation platform for use from small ships and submarines.[1]
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 combustion chambers at the rotor tips.[2]
Variants
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,[3] 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. After 25 flight hours it was captured by United States forces[4] and on July 19, 1945, shipped to the US under Operation Lusty on HMS Reaper (D82).
Specifications (V4)
Data from Illustrated Encyclopedia of Aircraft[3]
General characteristics
- Crew: 2
- Empty weight: 430 kg (948 lb)
- Gross weight: 640 kg (1,411 lb)
- Powerplant: 1 × BMW-Bramo Sh.14A radial piston engine , 104 kW (140 hp)
- Main rotor diameter: 10.00 m (32 ft 9.75 in)
- Main rotor area: 78.54 m2 (845.42 sq ft)
Performance
- Maximum speed: 48 km/h (30 mph, 26 kn)
See also
Related lists
References
- "Doblhoff". Hubschrauber Museum. Retrieved 2016-04-14.
- Ford, Roger (2013). Germany's Secret Weapons of World War II. London, United Kingdom: Amber Books. p. 224. ISBN 9781909160569.
- 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.
- Vertical Rewind: Spoils of War
External links
На других языках
[de] Doblhoff WNF 342
Der Doblhoff WNF 342 war ein experimenteller Hubschrauber der Wiener Neustädter Flugzeugwerke (WNF) aus den 1940er Jahren. Dies war der erste Hubschrauber, der mit einem Rückstoßantrieb in Form eines heißen Blattspitzenantriebs flog.- [en] Doblhoff WNF 342
[fr] Doblhoff WNF 342
Le Doblhoff WNF 342 a été le premier hélicoptère monoplace pliable à disposer d'un système d'entraînement des pales par éjection de gaz comprimés[2]. Il fut réalisé en 1943 par Friedrich von Doblhoff. Il devait permettre aux pilotes abattus derrière les lignes ennemies de rejoindre leur base. À cet effet, l’appareil devait être parachuté, plié dans une caisse de transport, à proximité du pilote en détresse. Celui-ci n’aurait plus eu qu'à l'assembler pour redécoller et revenir. L'objectif final de ce développement ne fut cependant pas atteint car il devint évident que l’assemblage nécessitait une deuxième personne, surtout pour le déploiement et le raccordement des pales.[it] Doblhoff Wn 342
Il Doblhoff Wn 342[2], indicato anche come Doblhoff WNF 342, era un elicottero sperimentale realizzato dall'azienda austriaca Wiener Neustädter Flugzeugwerke GmbH (WNF) negli anni quaranta.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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