The Kamov Ka-31 (NATO reporting name ‘Helix’) is a military helicopter developed for the Soviet Navy and currently in service in Russia China Cuban Navy and India in the naval airborne early warning role.As with all Kamov helicopters except the Ka-60/-62 family the Ka-31 has co-axially mounted contra-rotating main rotors. The airframe of the Ka-31 is based on the Kamov Ka-27.
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