Junkers T.21

The Junkers J 21 (manufacturer's sales designations T 21 and H 21) was a reconnaissance aircraft designed in Germany in the early 1920s and produced in the Soviet Union at the Junkers plant at Fili for use by the Soviet Air Force.


Junkers T.21
Class Aircraft
Type Fighter
Manufacturer Junkers
Origin Germany
Country Name Origin Year
Germany 1923
Country Name Operational Year Retirement Year
Iran (Persia) View
Russia (USSR) View
ManufacturerName Production From Production To Quantity
Junkers 120 View

The J 21 was an all-metal, parasol-wing monoplane of conventional configuration and fixed, tailskid undercarriage. The pilot and observer sat in tandem, open cockpits. Two prototypes were constructed at the Junkers factory in Dessau, the second with a wing of reduced area. Despite the fact that the prototypes were unable to attain the performance that had been specified by the Soviets, series production commenced at Fili in August 1923 where it was known as the Ju 21 (21 in Cyrillic).

The production version differed from the prototypes in having a BMW IV engine in place of the BMW III originally fitted, and carried machine gun armament for both the pilot and observer. Sluggish performance led to a few examples being fitted with L2 and L5 engines, but these provided little improvement. With performance only marginally better than the World War I-vintage de Havilland DH-9A that it had been purchased to replace, the Ju 21 was itself soon replaced by newly built DH-9As built under license as the Polikarpov R-1.

The type was also evaluated by the Reichswehr??'?s clandestine training school at Lipetsk, but it was rejected due to its poor performance and the Heinkel HD 17 purchased instead.

Role Reconnaissance aircraft
National origin Germany
Manufacturer Junkers
Designer Ernst Zindel
First flight 12 June 1923
Primary user Soviet Air Force
Number built 120


General characteristics

  • Crew: Two, pilot and observer
  • Length: 7.90 m (25 ft 11 in)
  • Wingspan: 10.70 m (35 ft 1 in)
  • Wing area: 21.8 m2 (235 ft2)
  • Empty weight: 830 kg (1,830 lb)
  • Gross weight: 1,225 kg (2,700 lb)
  • Powerplant: 1 × BMW IIIa, 138 kW (185 hp)

Performance

  • Maximum speed: 217 km/h (135 mph)
  • Range: 750 km (470 miles)

End notes