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Klemm L 25, later Klemm Kl 25 was a successful German light leisure, sports and training monoplane aircraft, developed in 1928. More than 600 aircraft were built, and manufacturing licenses were sold to the United Kingdom and the United States.
;L 25 d VII: Equipped with a Hirth HM 60R engine
;L 25 IVa: Equipped with Armstrong Siddeley Genet engine
;VL 25 Va: Three-seater variant, with a closed canopy, equipped with Argus As 8 straight engine
;L 25 Ve: (see L 25E) For Europa Rundflug 1930
;L 25E: (L 25 Ve) Special competition variant (E for Europa Rundflug 1930), with a closed canopy, smaller span, equipped with a Argus As 8
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: British Klemm Aeroplane Company B.K. Swallow
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Old Rhinebeck Aerodrome's Aeromarine-Klemm AKL-26 page
{{RLM aircraft designations 1920s German civil trainer aircraft 1920s German sport aircraft Klemm aircraft Single-engined tractor aircraft Aircraft first flown in 1928
Klemm L 25, later Klemm Kl 25 was a successful German light leisure, sports and training monoplane aircraft, developed in 1928. More than 600 aircraft were built, and manufacturing licenses were sold to the United Kingdom and the United States.
Design and construction
With a low cantilever wing, fixed landing gear, and two open cockpits, the aircraft was developed by Hanns Klemm, who used his previous design, the Daimler L20, as a starting point. It first flew on aDaimler F7502
Daimler is a German surname. It may refer to:
People
* Gottlieb Daimler (1834–1900), German inventor, industrialist and namesake of a series of automobile companies
* Adolf Daimler (1871–1913), engineer and son of Gottlieb Daimler
* Paul Da ...
engine. About 30 different versions of the Kl 25 were made, and these were equipped with engines ranging from . The fuselage was covered with plywood.
Depending on the model, the aircraft's weight was , and it had a wingspan. Takeoff was achieved at only and the maximum speed was between .
In relation to similar aircraft of the time, assembly was very easy, and this made it a very popular aircraft. According to the sales brochures, only 25% of the engine's power was needed to keep the aircraft flying, compared to biplane
A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While ...
s of the period, which required 50% engine power.
About 600 were built in Germany between 1929 and 1936, serving with various flight training organizations, with either wheels, skis, or floats. 15 were sold to Britain before the Second World War, being fitted with a variety of domestic engines, while 28 more were built by British Klemm Aeroplane Company
British may refer to:
Peoples, culture, and language
* British people, nationals or natives of the United Kingdom, British Overseas Territories, and Crown Dependencies.
** Britishness, the British identity and common culture
* British English ...
as the B.A. Swallow. Production in the United States was carried out by the Aeromarine-Klemm Company which enjoyed moderate success, as well as developing models for the American market, in isolation from the parent company, with about 120 built of all models.
Operation
Klemm L 25s took part in many competitions, among others in International Touring Aircraft Competitions (Europa Rundflug) in 1929 (best 4th place) and in 1930 (best 2nd and 3rd places, L 25E variant).Variants
:''NB, list not complete'' ; ;L 25 a: Built between 1927 and 1929, equipped with a Daimler F 7502 engine ;L 25 I: Built between 1928 and 1929, equipped with aSalmson AD.9
British Salmson aero-engines refers to a series of small French designed, air-cooled radial aero engine that were produced by British Salmson Aero Engines Ltd, under license from Société des Moteurs Salmson, in Great Britain during the late ...
engine
;L 25 Ia:
;L 25 IW:Floatplane version of the Ia, with two wooden floats supported by steel-tube struts in inverted 'W' configuration
;L 25 b: Built in 1931, equipped with a Daimler F 7502 engine
;L 25 b VII: Built in 1931, equipped with a Hirth HM 60 engine
;L 25 d II: Built in 1933, equipped with an Siemens-Halske Sh 13a engine
;L 25 d VII: Equipped with a Hirth HM 60R engine
;L 25 IVa: Equipped with Armstrong Siddeley Genet engine
;VL 25 Va: Three-seater variant, with a closed canopy, equipped with Argus As 8 straight engine
;L 25 Ve: (see L 25E) For Europa Rundflug 1930
;L 25E: (L 25 Ve) Special competition variant (E for Europa Rundflug 1930), with a closed canopy, smaller span, equipped with a Argus As 8
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: British Klemm Aeroplane Company B.K. Swallow
:British Aircraft Manufacturing Co. B.A. Swallow II
The B.A Swallow was a British light aircraft of the 1930s. It was a license-built version by the British Klemm Aeroplane Company (which later became known as the British Aircraft Manufacturing Co.) of the German Klemm L.25. A total of 135 were ...
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:Aeromarine-Klemm AKL-25
:Aeromarine-Klemm AKL-70
:Aeromarine-Klemm Model 70 Trainer
Operators
; * Bolivian Air Force ; * Royal Hungarian Air Force ; * Peruvian Air Force ; * Royal Romanian Air Force ; * South African Air ForceSpecifications (L 25.Ia)
See also
References
Bibliography
* Gerdessen, Frederik. "Estonian Air Power 1918 – 1945". '' Air Enthusiast'', No. 18, April – July 1982. pp. 61–76. .External links
Old Rhinebeck Aerodrome's Aeromarine-Klemm AKL-26 page
{{RLM aircraft designations 1920s German civil trainer aircraft 1920s German sport aircraft Klemm aircraft Single-engined tractor aircraft Aircraft first flown in 1928