The Kamov Ka-27 (NATO reporting name 'Helix') is a military helicopter developed for the Soviet Navy, and currently in service in various countries including Russia, Ukraine, Vietnam, South Korea, People's Republic of China, Republic of China and India. Variants include the Ka-29 assault transport, the Ka-28 downgraded export version, and the Ka-32 for civilian use.
Read more about Kamov Ka-27: Design and Development, Operational History, Variants, Specifications (Ka-27)