Beriev Be-4

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Beriev Be-4 (KOR-2)
KOR-2, 1941
KOR-2, 1941
Type: Flying boat
Design country:

Soviet Union 1923Soviet Union Soviet Union


  • Plant No. 288 Omsk
  • Plant No. 477 Krasnoyarsk
First flight:

October 21, 1940



Production time:

1941 to 1945

Number of pieces:


The Soviet Beriev Be-4 ( Russian Бериев Бе-4 , also: KOR-2 , КОР-2) is a single-engine, catapultable flying boat from the time of the Second World War . It was used as an on- board reconnaissance aircraft on the cruisers and battleships of the Soviet Black Sea Fleet .


In 1939 Georgi Beriev was commissioned to develop a successor model for the KOR-1 . This resulted in the KOR-2, the first prototype of which flew for the first time on October 21, 1940 with pilot Kotjakow in Taganrog . Factory testing lasted until January 1941, after which the aircraft was sent to the Naval Aviation Research Institute (LII) for state testing. This was carried out from February 2nd to 18th by pilot Malkow.

The series production was decided and should be started under the designation Be-4 in Plant No. 288 Savelovo near Moscow. Until the beginning of the Great Patriotic War , only two aircraft could be completed. One of them (serial number 28802) went into series testing with pilot Rejdel on August 13th.

In October 1941 the plant was evacuated to Omsk due to the threat posed by German troops. Six Be-4s could still be completed there. In plant no. 477 in Krasnoyarsk, of which Beriev was in charge from May 1943, the Be-4 received underwing suspensions so that either bombs, rockets or depth charges can be carried. Series production was continued there in 1944 and the majority of the Be-4s built (38 pieces) were built by the end of production in 1945.

Delivery of the Be-4 began in 1942. It was used on the cruisers Kirov and Maxim Gorki for coastal reconnaissance, anti-submarine defense and transport tasks.

In its weight class, the Be-4 was able to compete with all flying boats used at the time; Since the focus of the Soviet aircraft industry was on the production of fighter and attack aircraft , only very few copies were made. A total of 47 aircraft including the prototypes were built.

As a further development, the Be-8 was created in 1947 , but it did not go into series production.


The Be-4 had a two-stage keeled fuselage in all-metal construction. The M-62 engine was on a pylon above the cockpit. The wing was kinked and had a single-stage keeled support float on each side.

Technical specifications

Parameter Data
Conception Airborne reconnaissance flying boat
Manufacturer OKB Beriev
crew 3 (pilot, navigator, gunner)
length 10.50 m
span 12.00 m
height 4.05 m
Wing area 25.50 m²
Empty mass 2082 kg
Takeoff mass normal 2760 kg
maximum 3050 kg
Top speed 362 km / h near the ground
356 km / h at an altitude of 4700 m
Marching speed 280 km / h at a height of 100 m
Rate of climb 240 m / min
Rise time 12 min at 5000 m
Service ceiling practically 6000 m,
absolutely 7000 m
Range 960 km
Radius of action 400 km
Flight duration 3.4 hours at 280 km / h
Engine a piston engine Schwezow M-62 in the wing center section
power 660 kW (900 hp)
Armament a single or twin MG SchKAS 7.62 mm in the command post
Drop ammunition four FAB-100 bombs under the wings,
optional four RS-82 rockets,
optional four PLAB-100 depth charges


  • Ulrich Israel: Flying Boats of the Second World War . German military publisher, Berlin 1972.
  • Peter All-Fernandez (ed.): Aircraft from A to Z . Volume I: Aamsa Quail-Consolidated P2Y. Bernard & Graefe, Koblenz 1987, ISBN 3-7637-5904-2 .

See also

Web links

Commons : Beriev Be-4  - collection of images, videos and audio files

Individual evidence