DFS Kranich: Difference between revisions
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== Kranich II specifications == |
== Kranich II specifications == |
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{{Aircraft specs |
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General characteristics |
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| Overall length || 7,7 m |
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|crew=2 |
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|capacity= |
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| Span || 18 m |
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|length m=7.7 |
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|length ft= |
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| Maximum take-off weight || 465 kg |
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|length in= |
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| Maximum speed || 175 km/h |
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|span m=18 |
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| Best Glide ratio || 23 at 70 km/h |
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| Minimum sink || 0,7 m/s at 60 km/h |
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|aspect ratio=<!-- sailplanes --> |
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|max takeoff weight kg=465 |
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|more general= |
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Performance |
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|stall speed kmh= |
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|never exceed speed kmh=175 |
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|never exceed speed note= |
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|g limits=<!-- aerobatic --> |
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|roll rate=<!-- aerobatic --> |
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|glide ratio=23 at {{convert|70|km/h|mph kn|abbr=on|1}} |
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|sink rate ms=0.7 |
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|sink rate ftmin=<!-- sailplanes --> |
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|sink rate note=at {{convert|60|km/h|mph kn|abbr=on|1}} |
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|wing loading kg/m2= |
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== References == |
== References == |
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Revision as of 06:43, 13 June 2013
| Kranich | |
|---|---|
| |
| An AB Flygplan Se-103, a Swedish licence-built Kranich. | |
| Role | Two-seat sailplane |
| Manufacturer | Karl Schweyer AG (primary manufacturer) |
| Designer | Hans Jacobs for DFS |
| First flight | Template:Avyear |
| Variants | SZD-C Żuraw |
The DFS Kranich is a German glider. It was developed by Hans Jacobs for the Deutsche Forschungsanstalt für Segelflug (DFS).
History
Series production of the Kranich took place in the aircraft division of Karl Schweyer AG in Mannheim. The two-seater was in its version 2, the most widely built glider in Germany from 1935 to 1939. Several hundred examples were built; exact numbers are not known.
On 11 October 1940 Erich Klöckner in a Kranich achieved the record height in a glider of 11,460 m. Because it occurred in wartime, the altitude record was not recognized by the Allied occupying powers, and Klöckner only received official recognition by the Fédération Aéronautique Internationale (FAI) in the late 1990s. [1] This record height was only exceeded ten years after the flight by the American Bill Ivans during a similar scientific program in the Sierra Nevada.
In 1942 30 Kranichs were built by the Swedish manufacturer AB Flygplan in Norrköping, and delivered to the Swedish Air Force for training purposes. These machines were given the military designation Flygplan Se 103.
Between 1950 and 1952 50 examples of a slightly modified copy of the Kranich II were built in Poland, known as the SZD-C Żuraw (żuraw is Kranich in Polish = "crane").
After the war, Jacobs designed the Kranich 3, a new development very different from its predecessors. It was developed and produced at the Focke-Wulf aircraft factory in Bremen. The first flight was on 1 May 1952, piloted by Hanna Reitsch. Thirty seven were built.
Variants
- Kranich
- The initial prototype designed by Hans Jacobs for the DFS.
- Kranich II
- Production aircraft built primarily by Karl Schweyer AG, but also in Poland and Sweden
- Flygplan Se 103
- License production of 30 aircraft in Sweden for the Swedish Air Force
- SZD-C Żuraw
- License production of a modified Kranich in Poland
- Focke-Wulf Kranich III
- A major re-design.
Kranich II specifications
General characteristics
- Crew: 2
- Length: 7.7 m (25 ft 3 in)
- Wingspan: 18 m (59 ft 1 in)
- Max takeoff weight: 465 kg (1,025 lb)
Performance
- Never exceed speed: 175 km/h (109 mph, 94 kn)
- Maximum glide ratio: 23 at 70 km/h (43.5 mph; 37.8 kn)
- Rate of sink: 0.7 m/s (140 ft/min) at 60 km/h (37.3 mph; 32.4 kn)
References
- Horst Lommel: Vom Höhenaufklärer bis zum Raumgleiter 1935 – 1945, Geheimprojekte der DFS, Motorbuch Verlag, Stuttgart 2000, ISBN 3-613-02072-6
- aerokurier magazine 1/1999: Erich Klöckners Vorstoß zur Tropopause, Motor Presse 1999
- Georg Brütting; Die berühmtesten Segelflugzeuge, Motorbuch Verlag, Stuttgart 2003, ISBN 3-613-02296-6
- Horst Lommel: Zeitschrift Luftfahrt History Nr. 4: Der Flieger Erich - ein Nachruf auf Erich Klöckner, Lautec Software und Medien GmbH, Siegen 2004
- Peter F. Selinger (2004), Segelflugzeug-Geschichten: die Gleit- und Segelflugzeuge des Deutschen Segelflugmuseums mit Modellflug auf der Wasserkuppe, Gersfeld/Rhön: Stiftung Deutsches Segelflugmuseum Wasserkuppe mit Modellflug, ISBN 3-00-011649-4
- ^ aerokurier magazine 1/1999: Erich Klöckners Vorstoß zur Tropopause, Motor Presse 1999
External links
- Das Virtuelle Luftfahrtmuseum: Technische Daten, visited on 2 March 2009
- Deutsches Segelflugmuseum: 1935–1950, visited on 2 March 2009