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J 7 and J 9 (D.I)
Junkers J 9 modern reproduction,
in Luftwaffenmuseum Berlin Gatow.
Role Fighter
National origin Germany
Manufacturer Junkers
First flight 17 September 1917
Primary user Imperial German Navy
Number built 41

The Junkers D.I (factory designation J 9) was a fighter aircraft produced in Germany late in World War I, significant for becoming the first all-metal fighter to enter service. The prototype, a private venture by Junkers designated the J 7, first flew on 17 September 1917.[1] Demonstrated to the Idflieg early the following year, it proved impressive enough to result in an order for three additional aircraft for trials. However, the changes made by Junkers were significant enough for the firm to redesignate the next example the J 9, which was supplied to the Idflieg instead of the three J 7s ordered.

During tests, the J 9 was felt to lack the maneuverability necessary for a front-line fighter, but was judged fit for a naval fighter, and a batch of 12 was ordered. These were to have been supplied to a naval unit by September 1918, but instead equipped the same unit redeployed to the Eastern Front after the Armistice.

Specifications

Data from Holmes, 2005. p 32

General characteristics

  • Crew: One pilot
  • Length: 7.25 m (23 ft 9.4 in)
  • Wingspan: 9.00 m (29 ft 6.3 in)
  • Height: 2.60 m (8 ft 6 in)
  • Empty weight: 654 kg (1,438 lb)
  • Gross weight: 834 kg (1,834 lb)
  • Powerplant: 1 × BMW IIIa water cooled 6 cylinder inline, 138 kW (185 hp)

Performance

  • Maximum speed: 225[2] km/h (140 mph)
  • Endurance: 1.5[2] hours
  • Service ceiling: 6,000 m (19,700 ft)
  • Rate of climb: 3.5[2] m/s (683 ft/min)

Armament

References

  1. ^ Grosz and Terry 1984, p.67.
  2. ^ a b c Kay, Anthony L. Junkers Aircraft and engines 1913-1945 p. 28 (2004). London: Putnam Aeronautical Books ISBN 0 85177 985 9
  • Grosz, Peter; Terry, Gerard (1984). "The Way to the World's First All-Metal Fighter". Air Enthusiast 25 (August - November 1984): Pages 60–76. ISSN 0143-5450.  
  • Holmes, Tony (2005). Jane's Vintage Aircraft Recognition Guide. London: Harper Collins. ISBN 0 0071 9292 4.  
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. pp. 536.  
  • World Aircraft Information Files. London: Bright Star Publishing. pp. File 898 Sheet 1.  
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