Dornier Do 317


Dornier Do 317
Do 317
Role Heavy Bomber
Manufacturer Dornier Flugzeugwerke
First flight September 1943
Primary user Luftwaffe
Number built 6
Developed from Dornier Do 217

The Dornier Do 317 was a planned German heavy bomber of World War II.

Contents

Design and development

In June 1940, Dornier produced plans for further development of the Do 217, which would have a pressurized cabin and more powerful engines (DB 604 or Jumo 222) and would be designated the Do 317. The Do 317 was one of the proposals submitted to the RLM for the "Bomber B" project. Two versions of the Do 317 were proposed: the simplified Do 317A powered by two DB 603A engines and featuring conventional defensive armament, and the more advanced Do 317B with DB 610A/B engines, remotely-controlled defensive barbettes, heavier bombload, and an extended wing.

Six prototypes of the Do 317A were ordered, and the first of these, the Do 317 V1, commenced its flight test program on 8 September 1943. The Do 317 V1 was very similar in appearance to the Do 217, but featured a pressurized cabin and triangular tail fins. Trials with the Do 317 V1 revealed no real performance advance over the Do 217, so it was decided to complete the remaining five prototypes without cabin pressurization equipment and employ them as Henschel Hs 293 missile launchers. In this form the prototypes were redesignated Do 217R. At this time, the Do 317B project was abandoned due to changing wartime conditions.

Specifications

Do 317A

General characteristics

  • Crew: 4
  • Length: 16.80 m (55 ft 1½ in)
  • Wingspan: 20.63 m (67 ft 8½ in)
  • Height: 5.44 m (17 ft 10½ in)
  • Powerplant: 2 × DB 603A 12-cylinder inverted-vee engine, 1,305 kW (1,750 hp) each

Performance

Armament

Do 317B

General characteristics

  • Crew: 4
  • Length: 16.80 m (55 ft 1½ in)
  • Wingspan: 26.00 m (85 ft 3½ in)
  • Height: 5.44 m (17 ft 10½ in)
  • Max takeoff weight: 24,000 kg (52,910 lb)
  • Powerplant: 2 × DB 610A/B 24-cylinder inverted-vee engine, 2,140 kW (2,870 hp) each

Performance

Armament

  • 4 × 13 mm (.51 in) MG 131 machine gun in forward and rear dorsal turrets
  • 2 × 7.92 mm (.312 in) MG 81 machine gun in nose barbette
  • 1 × 20 mm MG 151/20 cannon in tail barbette
  • Up to 9,200 kg (20,282 lb) of disposable stores

See also

Related development
Aircraft of comparable role, configuration and era

Related lists

References

  • Griehl, M. Dornier Do 217-317-417: an Operation History. Airlife, 1991.
  • Green, W. Warplanes of the Third Reich. Galahad Books, 1986.
  • D. Herwig & H. Rode Luftwaffe Secret Projects - Ground Attack & Special Purpose Aircraft. ISBN 1-85780-150-4

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