Engineering:DFS Seeadler

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Short description: German flying boat sailplane, 1936
DFS Seeadler
Role Flying boat sailplane
National origin Germany
Manufacturer Deutsche Forschungsanstalt für Segelflug
Designer Hans Jacobs
First flight 12 November 1936

The DFS Seeadler (Sea Eagle) was a German flying boat sailplane designed by Hans Jacobs[1] of the Deutsche Forschungsanstalt für Segelflug (DFS). It was version of the 1935 DFS Rhönadler, with a new fuselage and strongly gulled wings to keep them clear from spray.[2] The aircraft was first flown in the summer of 1935, test piloted by Hanna Reitsch,[3] and towed by a Dornier Do 12.[4]

Specifications

Data from Die deutschen Flugboote : Flugboote, Amphibien-Flugboote u. Projekte von 1909 bis zur Gegenwart,[5] Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944[6]

General characteristics

  • Crew: one
  • Capacity: 85 kg (187 lb)
  • Length: 7.42 m (24 ft 4 in)
  • Wingspan: 17.36 m (56 ft 11 in)
  • Height: 2.21 m (7 ft 3 in)
  • Wing area: 18 m2 (190 sq ft)
  • Aspect ratio: 16.75
  • Airfoil: root: Göttingen 652; tip: Göttingen 535
  • Empty weight: 240 kg (529 lb)
  • Gross weight: 325 kg (717 lb)

Performance

  • Never exceed speed: 140 km/h (87 mph, 76 kn)
  • Maximum glide ratio: 20:1
  • Rate of sink: 0.8 m/s (160 ft/min)
  • Wing loading: 18 kg/m2 (3.7 lb/sq ft)

References

  1. Air Pictorial (Air League of the British Empire) 24: 85. 1962. 
  2. Simons, Martin (2006). Sailplanes 1920-1945 (2nd revised ed.). Königswinter: EQIP Werbung & Verlag GmbH. pp. 110. ISBN 3-9806773-4-6. 
  3. Reitsch, Hanna (1997). The Sky My Kingdom (reprint ed.). Guildford and King's Lynn: Stackole Books. p. 105. ISBN 9781853672620. 
  4. "Dornier Do. 12" (in Russian). Уголок неба. http://www.airwar.ru/enc/flyboat/do12.html. Retrieved August 19, 2009. 
  5. Gütschow, Fred (1978) (in German). Die deutschen Flugboote : Flugboote, Amphibien-Flugboote u. Projekte von 1909 bis zur Gegenwart (1. Aufl ed.). Stuttgart: Motorbuch-Verlag. pp. 41–43. ISBN 3879435650. 
  6. Schneider, Helmut (Dipl.Ing.) (1944) (in German). Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie (Facsimile reprint 1986 ed.). Leipzig: Herm. Beyer Verlag. p. 330. ISBN 381120484X.