Chyetverikov MDR-3

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MDR-3
Role Arctic Transport Flying Boat
National origin USSR
Manufacturer Chyetverikov
Designer Igor Vyacheslavovich Chyetverikov
First flight Template:Avyear
Number built 2
Variants Tupolev ANT-27, Tupolev MDR-4, Tupolev MTB-1

The MDR-3 (a.k.a.11) was a long-range flying boat designed and built in the USSR from Template:Avyear.

Development

In 1931, Chyetverikov was commissioned to design a new long-range flying boat for MA (Morskaya Aviatsiya – naval aviation), for which Chyetverikov used few new parts, borrowing wings, tailplane and engine nacelles (mounted above the wing) from the Grigorovich TB-5 and a scaled-up Grigorovich ROM-2 fuselage. The use of ready designed or built components led to quick construction of the prototype which was ready for flight tests in Dec 1931, which commenced in January Template:Avyear after the aircraft was transported to Sevastapol in the Crimea. Despite fast construction and excellent structural qualities, results of the flight tests were disappointing, with a takeoff time of 36 seconds, a climb rate of less than a metre per second and a ceiling of only 2,200m, resulting in the whole project being transferred to KOSOS (Konstrooktorskiy Otdel Sektora Opytnovo Stroitel'stva – section of experimental aeroplane construction), due to lack of faith in Chyetverikov's abilities to rectify the poor performance. The MDR-3 became the basis of the ANT-27, MDR-4 and MTB-1.

Specifications (MDR-3)

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

General characteristics

  • Crew: six
  • Length: 21.9 m (71 ft 10.5 in)
  • Wingspan: 32.2 m (105 ft 7.75 in)
  • Wing area: 153 m2 (1,649 sq ft)
  • Empty weight: 8,928 kg (19,683 lb)
  • Gross weight: 13,973 kg (30,805 lb)
  • Powerplant: 4 × BMW VI , 507 kW (680 hp) each

Performance

  • Maximum speed: 210 km/h (130.5 mph, 113.4 kn)
  • Range: 1,600 km (1,000 mi, 870 nmi)
  • Service ceiling: 2,200 m (7,218 ft)
  • Rate of climb: 4.76 m/s (937.4 ft/min)

Armament

  • 1 × machine gun in a nose mounting.
  • 1 × machine-gun in a dorsal mounting.

See also

References

Wikimedia Commons has media related to Chyetverikov.
  • Gunston, Bill. “The Osprey Encyclopaedia of Russian Aircraft 1875–1995”. London, Osprey. 1995. ISBN 1-85532-405-9
  • Taylor, Michael J.H. . “ Jane's Encyclopedia of Aviation. Studio Editions. London. 1989. ISBN 0-517-69186-8
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