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----- HISTORICAL RECORD -----

Flap Wheel

Country of Origin: Russia

The Flap Wheel (Russian SON-50) was a van-mounted fire-control radar associated with 57-mm S-60 and 130-mm KS-30 towed anti-aircraft guns. The radar also functioned as a range predictor for the S-60 gun. The radar was also used to support 14.5-mm ZPU-2/ZPU-4 anti-aircraft guns. According to analyst David Isby, the Flap Wheel, similar to most Russian gunfire control radars of its generation, was derived from the wartime SCR-584 radar delivered to the Soviet army as part of the...

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