The Beriev Be-4 (originally designated KOR-2) was a reconnaissance flying boat built to operate from Soviet warships during World War II. == Design and development == In 1939, Beriev was ordered to develop a successor to the KOR-1 design, which would overcome the numerous problems encountered in operational experience with that design. The new aircraft, with the in-house designation KOR-2, first flew on 21 October 1940 at the Beriev factory in Taganrog.
The Beriev Be-4 (originally designated KOR-2) was a reconnaissance flying boat built to operate from Soviet warships during World War II. == Design and development == In 1939, Beriev was ordered to develop a successor to the KOR-1 design, which would overcome the numerous problems encountered in operational experience with that design. The new aircraft, with the in-house designation KOR-2, first flew on 21 October 1940 at the Beriev factory in Taganrog.
Source: Wikipedia "Beriev Be-4" · CC BY-SA 4.0
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