Bartini DAR

DAR
Role Arctic reconnaissance flying boat
National origin USSR
Manufacturer ZOK NII GVF
Designer Roberto L. Bartini
First flight Spring 1936
Number built 1

The DAR (Dalnii Arkticheskii Razvyedchik – long range Arctic reconnaissance), was a twin-engined flying boat designed and produced in the USSR from 1934.

Development

In 1934 Roberto L. Bartini was assigned to the ZOK NII GVF (Zavod Opytno Konstrooktorskoye Naoochno-Issledovatel'skiy Institoot Grazhdanskovo Vozdooshnovo Flota — Factory for Special Construction at the Scientific Test Institute for the Civil Air Fleet), to lead the design of the DAR. Built entirely of Enerzh-6 stainless steel, the DAR closely resembled the Dornier Wal, with a high length to beam ratio hull, sponsons either side of the hull, strut supported parasol wing and twin engines in a single nacelle in the centre of the wing. Initially Bartini intended the two engines to drive separate propellers running in a tubular shroud, much like a modern ducted fan; Tests at TsAGI (Tsentrahl'nyy Aerodinamicheskiy i Ghidrodinamicheskiy Institoot - central aerodynamics and hydrodynamics institute) confirmed Bartini's theories but the prototype was completed with a conventional tandem tractor/pusher engine nacelle.

Apart from the 'Enerzh-6' construction material, the DAR had several other innovations, including; full span slotted flaps, and pivoting wing-tip ailerons which were in two sections, fore and aft. During later testing steel faced skis were attached to the fuselage sides by rubber bag springs. Flight testing was carried out at the small boat port at Leningrad in the spring of 1936, with no major problems, and five more were ordered but production was not carried out.

Specifications (DAR)

Data from Gunston, Bill. "Encyclopaedia of Russian Aircraft 1875-1995". London:Osprey. 1995. ISBN 1-85532-405-9

General characteristics

  • Crew: 3+
  • Empty weight: 4,820 kg (10,626 lb)
  • Gross weight: 7,200 kg (15,873 lb)
  • Powerplant: 2 × Hispano-Suiza 12YBRShp, 641.3 kW (860 hp) each

Performance

  • Maximum speed: 240 km/h (149 mph)
  • Cruising speed: 229 km/h (142 mph)
  • Range: 2,000 km (1,243 miles)
  • Endurance: 20 hours

See also

Aircraft of comparable role, configuration and era

Related lists

References

    • Gunston, Bill. “The Osprey Encyclopaedia of Russian Aircraft 1875–1995”. London, Osprey. 1995. ISBN 1-85532-405-9
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