at anchor in
Kola Bay, 1942 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. ==Variants==