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Dornier Do K

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Dornier Do K

Dornier Do K
Do K3
Role Airliner
National origin Germany
Manufacturer Dornier
Designer Claudius Dornier
First flight 7 May 1929 (Do K1)
Number built 3

The Dornier Do K was a German commercial passenger and freight monoplane designed by Claudius Dornier and built by Dornier Flugzeugwerke.[1] Only three prototypes of different designs were built and the type was not a commercial success.[1]

Design and development

Do K1

The first Dornier Do K was the K1 which first flew on 7 May 1929.[1] The K1 was a conventional braced high-wing monoplane powered by a single nose-mounted 510 hp (380 kW) licence-built Bristol Jupiter VI radial engine and had a conventional landing gear with a tail skid.[1] The square section fuselage had an enclosed cockpit for two with a cabin behind for freight or eight passengers.[1] Test flights showed that performance was poor and the aircraft was re-designed.[1]

Do K2

The Do K2 flew in December 1929 with similar wings and fuselage but had a changed landing gear and four 240 hp (179 kW) Gnome-Rhone Titan radial engines.[1] The four engines were strut mounted on each side of the fuselage in tandem pairs, one in tractor configuration and the other as a pusher.[1] Although the aircraft had an increase in available power the performance was little improved on the K1.[1]

Do K3

The K3 was a complete rethink of the design, the braced wing was replaced with a cantilever wing of larger span.[1] The fuselage was changed to oval and stretched for two extra passengers and the tail skid was replaced with a tail wheel and the main units were enclosed in fairings.[1] The four engines were in the same tandem arrangement as the K2 but located lower on the fuselage and changed to 305 hp (227 kW) Walter Castor radial engines.[1] The performance was greatly improved but still provoked little interest and no others were built.[1]

Specifications (Do K3)

Data from [1] The Illustrated Encyclopedia of Aircraft

General characteristics
  • Crew: 2
  • Capacity: 10
  • Length: 16.65 m (54 ft 7½ in)
  • Wingspan: 25 m (82 ft 0¼ in)
  • Height: 4.55 m (14 ft 11¼ in)
  • Wing area: 89 m2 (958.02 ft2)
  • Empty weight: 4265 kg (9403 lb)
  • Gross weight: 6200 kg (13669 lb)
  • Powerplant: 4 × Walter Castor radial piston engine, 227 kW (305 hp) each

Performance

  • Maximum speed: 230 km/h (143 mph)
  • Range: 800 km (497 miles)
  • Service ceiling: 6000 m (19685 ft)

References

Notes
Bibliography

External links

  • "Do-K Shows Speed In Test Flights", May 1932, Popular Mechanics
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