Tupolev MTB-1
| Tupolev MDR-4 (ANT-27) / MTB-1 (ANT-27bis) | |
|---|---|
| Type: | Multipurpose - flying boat |
| Design country: | |
| Manufacturer: | |
| First flight: |
|
| Commissioning: |
1936 |
| Production time: |
1936/37 |
| Number of pieces: |
15th |
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The Tupolew MTB-1 ( Russian Туполев МТБ-1 , also ANT-27bis , АНТ-27бис) was a Soviet flying boat of the 1930s. The designation of the first prototype was MDR-4 (for russian Морской дальний разведчик , Marine Fernaufklärer) or after the initials of the designer Andrei Tupolev also ANT-27 .
development
The four-engine MDR-3 flying boat , which Igor Tschetwerikow designed at the ZKB in 1931, served as the starting model for the design . It had completed its flight tests from January to March 1932, but was not approved for series production due to disappointing performance. Now the ZAGI under Andrei Tupolev has been commissioned to revise the project. Some changes were made, the most obvious being the replacement of the four engines located in two tandem nacelles on scaffolding above the wing with three individually positioned side by side. As a special feature, the two outer propellers were arranged in a pulling configuration, but the central one in a pushing configuration. In March 1934, the prototype known as MDR-4 (ANT-27) was completed and flight testing began, but had an accident the following month. The draft was revised again and a second prototype under the name ANT-27bis (bis = Russian in the sense of " again ") was completed by autumn 1934. Its flight tests began in May 1935 and was successful, but the flight performance proved to be still inadequate due to the weak engines. Probably due to a lack of alternatives, in April 1936 the instruction to build a small series of 15 flying boats under the designation MTB-1 for Morskoi tjaschjoly bombardirowschtschik ( Russian Морской тяжёлый бомбардировщик , heavy naval bomber) followed, of which the other nine were delivered in 1937. All of them went to the Black Sea Fleet . At the beginning of the Great Patriotic War , some MTB-1 were still in service, but have now been used for transport tasks and segregated until 1942.
construction
The MTB-1 was as self-supporting all-metal - wing monoplane designed in shell construction. She had a sharp , two-tiered hull, which was divided into numerous watertight compartments, separated by bulkheads . The two single-stage, rigid support floats were located at the end of the wing center section at the level of the two outer engine pods. The horizontal stabilizer was braced with I-stems.
Technical specifications
| Parameter | Data of the MTB-1 (ANT-27bis) |
|---|---|
| crew | 6th |
| length | 21.9 m |
| Wingspan | 39.4 m |
| height | 6.36 m |
| Wing area | 177.5 m² |
| Empty mass | 10,520 kg |
| Takeoff mass | normal 15,200 kg maximum 16,230 kg |
| drive | three 12-cylinder V-engines AM-34R |
| Starting power | 610 kW (830 PS) each |
| Top speed | 235 km / h near the ground |
| Marching speed | 182 km / h (economical) 205 km / h at an altitude of 3,000 m |
| Rate of climb | 200 m / min |
| Service ceiling | practically 4,470 m |
| Range | normal 1,470 km maximum 2,000 km |
| Radius of action | 800 km |
| Flight duration | normal 7.2 h at 205 km / h maximum 11 h at 182 km / h |
| Armament | Two 7.62 mm MG SchKAS in the front and rear of the fuselage, one 20 mm MK in the back of the fuselage |
| Drop ammunition | up to 1,000 kg of bombs, mines or torpedoes |
literature
- Ulrich Israel: Flying Boats of the Second World War . Military Publishing House, Berlin 1972, p. 46/47 .
Web links
- History, dates and photos (Russian)
Individual evidence
- ↑ Tschetwerikov MDR-3. In: Fliegerrevue. No. 08/1970, p. 350.
- ↑ Peter All-Fernandez (ed.): Aircraft from A to Z . tape 3 . Bernard & Graefe, Koblenz 1989, ISBN 3-7637-5906-9 , pp. 373 .