Hansa-Brandenburg W.20

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Role Submarine-launched reconnaissance flying boat
National origin Germany
Manufacturer Hansa-Brandenburg
Number built 3

The Hansa-Brandenburg W.20 was a German submarine-launched reconnaissance flying boat of the World War I era, designed and built by Hansa-Brandenburg.[1]

Design and development[edit]

Due to the need to be stored and launched from a submarine aircraft carrier, the W.20 was a small single-seat biplane flying boat that was designed to be assembled and dismantled quickly.[1] It had a slender hull on which was mounted a biplane wing and a conventional braced tailplane.[1] It was powered by a seven-cylinder, 80 PS Oberursel U.0 rotary engine — basically a German-made near-clone of the Gnome Lambda pre-war French rotary — mounted on struts between the wings driving a pusher propeller.[1] The pilot had an open cockpit just forward of the lower wing.[1] Because of the slender hull stabilising floats were fitted below and at the end of the lower wings.[1] The submarine intended to carry the W.20 was not built and only three W.20s were built.[1]

Specifications (3rd built)[edit]

Data from [1]

General characteristics

  • Crew: One
  • Length: 5.93 m (19 ft 5½ in)
  • Wingspan: 6.80 m (22 ft 3¾ in)
  • Wing area: 15.82 m2 (170.29 ft2)
  • Empty weight: 396 kg (873 lb)
  • Gross weight: 568 kg (1252 lb)
  • Powerplant: 1 × Oberursel U.0 7-cylinder rotary piston engine, 60 kW (80 hp)


  • Maximum speed: 117 km/h (73 mph)
  • Endurance: 1 hours  15 min

See also[edit]

Related lists


  1. ^ a b c d e f g h Illustrated Encyclopedia of Aircraft Orbis 1985, pp. 2098–2099