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Sikorsky S-12

From Wikipedia, the free encyclopedia
S-12
Sikorsky S-12 circa 1913
General information
TypeTrainer
National originRussian Empire
ManufacturerRussian Baltic Railroad Car Works
Designer
Igor Sikorsky
Number built12
History
First flight1913
Developed fromS-11

TheSikorsky S-12 was a Russian single engine trainer aircraft completed in the spring of 1913 by theRussian Baltic Railroad Car Works whileIgor Sikorsky was the chief engineer of the aircraft manufacturing division.

Design and development

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The S-12 was a single seat mid-wingmonoplane withwire-braced wings and powered by aGnome Lambda air-cooledrotary engine rated at 80 hp (60 kW). It was smaller and lighter than theS-11 on which it was based, and was specifically designed to be highly maneuverable.[1][2]

Operational history

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The S-12 was the most successful monoplane Sikorsky designed during his time in Russia and twelve examples were produced. In September 1913 an S-12 became the first Russian aircraft to perform aninside loop at the Kolomyazhskiyhippodrome north of St. Petersburg. Later an S-12 set an altitude record of 3,680 metres (12,070 ft). During World War I and theRussian Revolution S-12s served with the Russian Air Force and some were still in service until 1922.

Specifications

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Data fromRussian Aviation Museum[2]

General characteristics

  • Crew: One
  • Wing area: 212 sq ft (19.7 m2)
  • Empty weight: 924 lb (419 kg)
  • Gross weight: 1,501 lb (681 kg)
  • Powerplant: 1 ×Gnome Lambda 7-cylinder air-cooled rotary piston engine, 80 hp (60 kW)
  • Propellers: 2-bladed

Performance

  • Service ceiling: 12,070 ft (3,680 m)
  • Wing loading: 7.1 lb/sq ft (34.5 kg/m2) max load

References

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  1. ^Finne, K.N. (1987).Igor Sikorsky: The Russian Years. translated and adapted by Von Hardesty; Carl J. Bobrow and Von Hardesty, eds. Washington, D.C.: Smithsonian Institution Press. p. 33.ISBN 0-87474-274-9.
  2. ^ab"S-12".ram-home.com. 4 September 1997. Archived fromthe original on 5 March 2008. Retrieved24 April 2017.
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