Klemm Kl 25
| Kl 25 | |
|---|---|
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| Role | Training planeTemplate:Short description |
| Manufacturer | Klemm |
| First flight | 1928 |
| Number built | About 720 (including American-built aircraft) |
| Variants | Klemm Kl 26 |
Klemm L 25, later Klemm Kl 25 is 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,[1] the aircraft was developed by Hanns Klemm, who used his previous design, the Daimler L20, as a starting point. It first flew on a Script error: No such module "convert". Daimler F7502 engine.[1] About 30 different versions of the Kl 25 were made, and these were equipped with engines ranging from Script error: No such module "convert".. The fuselage was covered with plywood.
Depending on the model, the aircraft's weight was Script error: No such module "convert"., and it had a Script error: No such module "convert". wingspan. Takeoff was achieved at only Script error: No such module "convert". and the maximum speed was between Script error: No such module "convert"..
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 biplanes of the period, which required 50% engine power.
About 600 were built in Germany between 1929 and 1936,[1] serving with various flight training organizations, with either wheels, skis, or floats.[1] 15 were sold to Britain before the Second World War,[1] being fitted with a variety of domestic engines,[1] while 28 more were built by British Klemm Aeroplane Company as the B.A. Swallow.[1] 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).[2]
Variants
- NB, list not complete
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- L 25 a
- Built between 1927 and 1929, equipped with a Template:Cvt Daimler F 7502 engine
- L 25 I
- Built between 1928 and 1929, equipped with a Template:Cvt Salmson AD.9 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[3]
- L 25 b
- Built in 1931, equipped with a Template:Cvt Daimler F 7502 engine
- L 25 b VII
- Built in 1931, equipped with a Template:Cvt Hirth HM 60 engine
- L 25 d II
- Built in 1933, equipped with an Template:Cvt Siemens-Halske Sh 13a engine
- L 25 d VII
- Equipped with an Template:Cvt Hirth HM 60R engine
- L 25 IVa
- Equipped with Armstrong Siddeley Genet engine[4]
- VL 25 Va
- Three-seater variant, with a closed canopy, equipped with Template:Cvt Argus As 8 straight engine[2]
- 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 Template:Cvt Argus As 8[2]
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- British Klemm Aeroplane Company B.K. Swallow
- British Aircraft Manufacturing Co. B.A. Swallow II
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- Aeromarine-Klemm AKL-25
- Aeromarine-Klemm AKL-70
- Aeromarine-Klemm Model 70 Trainer
Operators
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Specifications (L 25.Ia)
See also
Related development
Related lists
References
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Bibliography
- Gerdessen, Frederik. "Estonian Air Power 1918 – 1945". Air Enthusiast, No. 18, April – July 1982. pp. 61–76. Template:Catalog lookup linkScript error: No such module "check isxn".Script error: No such module "check isxn".Script error: No such module "check isxn".Script error: No such module "check isxn".Script error: No such module "check isxn".Script error: No such module "check isxn".Script error: No such module "check isxn".Script error: No such module "check isxn".Script error: No such module "check isxn"..
External links
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