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The Tupolev MTB-1 (known originally as the MDR-4 and internally to Tupolev as the ANT-27) was a patrol flying boat built in the Soviet Union in the mid-1930s. It was a refined version of the unsuccessful Chyetverikov MDR-3. The revised design retained the MDR-3's hull, but added a newly designed, full-cantilever wing, a new tail, and a new engine installation featuring two tractor and one pusher unit. Trials began in March 1934 but the prototype was destroyed during one takeoff.

MDR-4 and MTB-1
Role Patrol flying boat
Manufacturer Tupolev
First flight 1934
Retired 1942
Number built 15

A second prototype was constructed the following year, and redesignated MTB-1 to reflect a new torpedo-carrying role. Despite its poor performance in trials, the aircraft was urgently needed to fill a niche in the Soviet Navy, and it was accepted for production before flight testing was complete. Despite some early structural failures, 15 of these machines were eventually produced and saw service in the Navy for several years, remaining in service until 1942.[1]


Operators


 Soviet Union

Specifications (MTB-1)


Data from The Osprey Encyclopaedia of Russian Aircraft 1875–1995[1]

General characteristics

Performance

Armament


Notes


  1. Gunston, p. 400

Bibliography



Further reading



На других языках


[de] Tupolew MTB-1

Die Tupolew MTB-1 (russisch Туполев МТБ-1, auch ANT-27bis, АНТ-27бис) war ein sowjetisches Flugboot der 1930er Jahre. Die Bezeichnung des ersten Prototyps lautete MDR-4 (für russisch Морской дальний разведчик, Marinefernaufklärer) bzw. nach den Initialen des Konstrukteurs Andrei Nikolajewitsch Tupolew auch ANT-27.
- [en] Tupolev MTB-1

[it] Tupolev ANT-27

Il Tupolev MTB-1 (in cirillico Туполев МТБ-1, da Morskoj Torpedonosets Bombardirovščik idrobombardiere-aerosilurante pesante), designazione interna ANT-27 (АНТ-27) ed originariamente indicato come MDR-4 (МДР-4), era un idrovolante trimotore a scafo centrale ed ala alta sviluppato inizialmente dallo TsAGI, quindi proseguito dall'OKB 156 diretto da Andrej Nikolaevič Tupolev e prodotto in Unione Sovietica a cavallo della metà degli anni trenta.

[ru] МДР-4

МДР-4 (АНТ-27) — морской дальний разведчик и торпедоносец, разработанный в ОКБ Туполева в середине 1930-х годов.



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