UNITED24 - Make a charitable donation in support of Ukraine!

Military


ANT-27 MDR-4

In February 1933, TsAGI designers began designing the long-range maritime reconnaissance ANT-27 (MDR-4 - Morskoy Dalniy Razvedchik). Initially, the prototype of the seaplane of engineer I.V. Chetverikov - MDR-3, released in 1932, was taken as a basis, but then the revision actually turned into the creation of a new machine. ANT-27 (MDR-4) was a three-engined high wing with a cantilever wing and a single fin tail. The wing consisted of a three-sided center section with duralumin lining and consoles covered with canvas. The specific load on the wing was reduced, which increased the climb and the ceiling.

ANT-27 (MDR-4) was designed in 3 versions: long-range reconnaissance, heavy bomber and a passenger plane with 14 seats. The reconnaissance crew consisted of five people: a navigator (he was the front gunner), two pilots, a flight mechanic and a stern gunner. In the bomber version, two more were added: the radio operator bombardier in the front cockpit and the gunner’s arrows.

The construction of the prototype seaplane was completed on March 7, 1934, and after 3 days in disassembled form, it was sent from Moscow to Sevastopol for testing. The first flight of the ANT-27 (MDR-4), piloted by T.V. Ryabenko, took place on April 8. In the following tests, test pilot A.A. Volynsky and TsAGI designer I.I. Pogossky were at the helm. In general, the flights were successful, but the pilots complained about the behavior of the aircraft during takeoff from the water - it was unusually responsive to the runway buildup accepted at that time. On April 16, 1934, a plane crash occurred, witnessed by A.N. Tupolev who came from Moscow. The seaplane on takeoff, coming out of the bay, met with a high rolling wave, hit it and crashed into the next one at high speed. The middle motor struts could not stand it, and the engine collapsed onto the cabin, killing I.I.Pogossky.

Further tests were conducted on the "backup", designated ANT-27bis. It strengthened the mountings motoinstallations, reduced the area of the horizontal and vertical tail, and increased the width of the boat. October 29, 1934 T.V.Ryadenko made the first flight on the "doubler". Factory testing continued until March 1935. It was noted that the car has good hydrodynamic qualities, ease of operation and high flight performance.

The Commission of the Air Force Institute recommended that the ANT-27 (MDR-4) be adopted, subject to the elimination of some of the deficiencies identified during state tests. In particular, it was recommended to install high-altitude engines M-34N. In the autumn, the flights of the updated “doubler” began. The maximum speed rose to 266 km / h, and the practical ceiling - to 6550 meters.

On September 23, ANT-27 (MDR-4) again suffered a catastrophe, in which 3 crew members were killed. Despite this, it was decided to mass-produce the new machine. In early 1936, the seaplane was officially adopted. On January 27, the Main Aviation Industry Directorate established Taganrog Plant No. 31 by the end of the year to assemble 16 boats. On April 29, 1936, the lead production aircraft went to the tests, which took place in two variants of loading - a scout and a bomber.

Taganrog enterprise, due to its amusement with other projects, managed to produce only 5 cars by the end of the year. In 1937, the plant produced 10 cars equipped with improved M-34PH engines. All assembled vehicles entered service with the Black Sea Fleet as part of the 124th Marine Heavy Squadron, where they were operated for several years.

Years (development-testing (first flight) / production) 1933-34 / 36-37
Development COSOS TsAGI (A.N. Tupolev / I.I.Pogossky)
Manufacturers ZOK TsAGI (Moscow) + zd No. 31 (Taganrog)
Release (pieces) 2 prototypes + 15
Length (m.) 21.90
wingspan (m.) 39.15
height (m.) 8.76
Wing area (m 2 )177.50
Empty weight (kg.)10692
take-off (kg.) 16386
Engine (power (HP) 3 x M-34R (830)
Max speed. (km / h) 266
cruise speed. (km / h)196
Rate of climb (m / min) 185
Practical ceiling (m) 4300
Flight duration / range (km.) 11 / 2000
Crew (people) 5-7
Armament
  • 3 1 x 20 "Oerlikon" cannon
  • 1 x ShKAS machine gun
  • 1x2 DA-2 or 3x7.62 ShKAS
  • Bombs (kg.) up to 6000.

    ANT-27 ANT-27 ANT-27 ANT-27 ANT-27

    ANT-27



    NEWSLETTER
    Join the GlobalSecurity.org mailing list



     
    Page last modified: 20-10-2018 18:43:58 ZULU