Junkers CLS.I

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Junkers CLS.I
Junkers J 11 (CLS.I).jpg
Role Seaplane
Manufacturer Junkers
Designer Hugo Junkers
First flight 1918
Primary user Cross-Pattee-alternate3.svg Germany
Number built 3 [1]
Developed from Junkers CL.I
Wingspan 12.8 m (41 ft 10 in)[2] - 12.8 m (42 ft)[3]
Engine 185-195hp Benz Bz.IIIb
Armament 2×fixed sync. LMG08/15 and
flexible rear Parabellum[4]
Crew 2
Max Speed 174 km/h (108 mph)[3] to 180 km/h (112 mph)[1][4]-196 km/h (122 mph)[2]
Climb 3,000 m (10,000 ft) in 26:00[5]

In 1918 three examples of the Junkers CLS.I were built, a floatplane version of the Junkers CL.I. The type did not go into production. [1] It differed little from the CL.I except for the addition of a fin, and the tail surfaces never were quite worked out.[4] The company designation was the J.11.[6]

With longer wings than the CL.I, the CLS.I was over 450 kg (1,000 lb) heavier, which resulted in a corresponding drop in performance. It was only postwar when it was given a 300hp Hispano engine that it reached its potential in the Junkers A-20.[5]

For more information, see Wikipedia:Junkers CL.I.


  1. 1.0 1.1 1.2 Munson, p.164.
  2. 2.0 2.1 Nowarra, pp.204-205.
  3. 3.0 3.1 Cowin, p.12.
  4. 4.0 4.1 4.2 Gray, p.435.
  5. 5.0 5.1 Cowin, p.10.
  6. Nowarra, p.77.
  • Hugh Cowin, Profile Publications 187: The Junkers Monoplanes. Great Britain, Profile Publications, 1967.
  • Peter Gray and Owen Thetford. German Aircraft of the First World War. Great Britain, Putnam, 1962, 1987. ISBN 0-85177-809-7.
  • Kenneth Munson, Fighters 1914-19, Attack and Training Aircraft. New York: MacMillan Publishing Co., Inc., 1976. ISBN 0713707607
  • Heinz J. Nowarra, Bruce Robertson, and Peter G. Cooksley. Marine Aircraft of the 1914-1918 War. Letchworth, Herts, England: Harleyford Publications Limited, 1966. ISBN 0900435070