Heinkel HD 21

HD 21 and HD 29

National origin: Germany
Manufacturer: Heinkel
First flight: 1924

The Heinkel HD 21 was a trainer built in Germany during the 1920s. It was a conventional single-bay biplane with staggered wings braced with N-type interplane struts. The main units of the fixed, tailskid undercarriage were linked by a cross-axle, and the aircraft had three open cockpits in tandem, although one of these was typically faired over. The HD 29 of 1925 was essentially similar, but was purely a two-seater.

One HD 21 (registered SE-ACY) was flown as an air ambulance by Carl Gustaf von Rosen for the Red Cross during the Italian invasion of Abyssinia in 1935. Others were flown by the Reichswehr at the clandestine aviation training facility in Lipetsk.

Specifications

General characteristics

Crew: Two, pilot and instructor
Length: 7.25 m (23 ft 9 in)
Wingspan: 10.60 m (34 ft 9 in)
Height: 3.05 m (10 ft 0 in)
Wing area: 27.8 m² (299 ft²)
Empty weight: 680 kg (1,500 lb)
Gross weight: 980 kg (2,160 lb)
Powerplant: 1 x— Mercedes D.I, 75 kW (100 hp)

Performance

Maximum speed: 135 km/h (103 mph)
Rate of climb: 2.7 m/s (530 ft/min)

Armament

1 x— .22 LR caliber built in machine pistol
2 x— 100 .22 LR caliber links

Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. pp. 498. ISBN 0710607105.
"The Round-Germany Flight". Flight: 321-22. 28 May 1925. http://www.flightglobal.com/pdfarchive/view/1925/1925%20-%200321.html. Retrieved 2008-04-23.

Heinkel HD 21 Pictures and Heinkel HD 21 for Sale.

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Source: WikiPedia