A flyable GST?

[dimlee]

Originally Posted by Pursuivant

GST - Soviet license-built version of PBY (probably PBY-1) with Shvetsov M-62 or ASh-62IR engines, Soviet armament, instruments, and crew equipment. First produced in 1939. Unknown number built, but widely used.

Just 27 a/c were built according to:
http://www.hydroplanes.ru/gidrosamol...rosamolet.html
http://www.navylib.su/avia/katalina/03.htm

Production stopped in 1940.
There were 11 in the Black Sea Navy (9 lost in 1941-1942) and 7 in the North (at least 4 lost in 1941).
4 planes survived WWII. Engines: М-87А, M-88, M-62, M-62IR.
Superior to other Soviet flying boats, but same destiny - high losses due to reckless (or desperate) tactics in early war period, poor maintenance, low crew qualifications, lack of spare parts.