Beriev MBR-2

https://en.wikipedia.org/wiki/Beriev_MBR-2

The Beriev MBR-2 was a Soviet multi-purpose (including reconnaissance) flying
boat which entered service with the Soviet Navy in 1935. Out of 1365 built, 9
were used by foreign countries including Finland and North Korea. In Soviet
Union it sometimes carried the nickname of "K?????" (cow) and "?????" (barn).

The MBR-2 was designed by Georgy Mikhailovich Beriev and first flew in 1931,
powered by an imported 373 kW (500 hp) BMW VI.Z engine. Production models, which
arrived in 1934, used a licence-built version of this engine, the Mikulin M-17
of 508 kW (680 hp), and could be fitted with a fixed wheel or ski undercarriage.

Beriev also designed a commercial airliner derivation, the MP-1, which entered
airline service in 1934, and a freighter version, which followed in 1936.

In 1935, an improved version was developed, the MBR-2bis, powered by the Mikulin
AM-34N engine, and fitted with an enclosed cockpit, dorsal gun-turret and
enlarged vertical tail. In this configuration, the machine remained in
production until 1941. As with the MBR-2, the bis spawned a commercial
derivative and the MP-1bis entered service in 1937.


Role
Patrol aircraft

Manufacturer
Beriev OKB

Designer
Georgy Mikhailovich Beriev

First flight
1931

Introduction
1935

Status
Out of production; retired

Primary user
Soviet Navy

Produced
1934-1941

Number built
1365

Variants

MBR-2M-17 :
Short-range maritime reconnaissance, bombing flying-boat, powered by a 508 kW
(680 hp) Mikulin M-17B piston engine.

MBR-2AM-34 or MBR-2bis :
Improved version, powered by a Mikulin AM-34N engine.

MBR-2M-103 :
One MBR-2AM-34 was fitted with the more powerful M-103 engine. One prototype
only.

MP-1 :
Civil version of the MBR-2M-17 flying-boat. It could carry six passengers in an
enclosed cabin.

MP-1bis :
Civil version of the MBR-2AM-34 flying-boat.

MP-1T :
Freight transport conversion of MBR-2.

Specifications (MBR-2bis)

General characteristics
Crew: 4-5
Length: 13.50 m (44 ft 3½ in)
Wingspan: 19.00 m (62 ft 4 in)
Height: 4.40 m (14 ft 9 in)
Empty weight: 2,718 kg (5,990 lb)
Max. takeoff weight: 4,245 kg (9,359 lb)
Powerplant: 1 × Mikulin AM-34N V12 engine, 559 kW (750 hp)

Performance
Maximum speed: 275 km/h (148 knots, 171 mph)
Range: 1,500 km (810 nm, 930 mi)
Service ceiling: 4,900 m (16,080 ft)

Armament

Guns:
1× 7.62 mm (0.30 in) PV-1 machine gun in bow
1× 7.62 mm ShKAS machine gun in dorsal turret

Bombs: 300 kg (660 lb) of bombs, mines, and depth charges carried underwing





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