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The Kamov Ka-27 shipborne ASW and utility helicopter is in service with Russian Navy

Development of the Ka-27 family began in 1969. The type made its first flight in 1973. The Ka-27 retains Kamov’s well-proven contra-rotating co-axial rotor configuration and similar dimensions of the previous Ka-25. Kamov is the only company to have mass produced co-axial helicopters. With more than double the power of the Ka-25 Hormone, the Ka-27 is a considerably heavier helicopter with a larger fuselage, but nevertheless offers increased performance with much-improved avionics and more modern flight-control system.

This helicopter has no tail rotor. Instead it uses two rotors spinning in opposite directions to give directional stability during flight. Furthermore the Ka-27 uses much shorter rotor blades. All of these features allowed to reduce footprint on ships. The Ka-27 is extremely stable and easy to fly, and automatic height hold, automatic transition to and from the hover and autohover are possible in all weather conditions.

The first production variant was the Ka-27PL (Western designation Helix-A). It is a basic Anti-Submarine ധąɾƒąɾҽ (ASW) version, which entered service in 1982. The Ka-27PL’s fuselage is sealed over its lower portions for buoyancy, while extra floatation equipment can be fitted in boxes on the lower part of the centre fuselage. Ka-27PL has all the usual ASW and other equipment including dipping sonar and sonobuoys as well as Osminog (octopus) search radar. It can carry homing torpedoes, anti-ship missiles, or anti-submarine ʙᴏᴍʙs. These helicopters typically operate in pairs.

The main Search and Rescue (SAR) and planetguard Ka-27 variant is the radar-equipped Ka-27PS (Helix-D). This usually carries external fuel tanks and flotation gear, and has a hydraulically-operated, 300-kg capacity rescue winch. It is intended to rescue survivors from shipwrecks. This helicopter is also used for utility operations. The Ka-27 series helicopters are operated by a crew of 3, including pilot, technical coordinator, ASW systems operator (Ka-27PL), or winch operator (Ka-27PS).

A total of 296 of the Ka-27 helicopters and its variants were built. Production was stopped, but it may be resumed if required. Currently Russian Navy operates about 90 Ka-27 helicopters of all variants. It is also used by the Ukrainian Navy, and a number of other countries, including Algeria, India, both North and South Koreas, Vietnam. This helicopter has served aboard a variety of warships. Currently a new Ka-65 naval helicopter is being developed in Russia. Images of its first prototypes emerged in 2019.