The Ka-27 Helix is primarily used as an anti-submarine helicopter as well as a troop transport.
There are many variants of the Helix, including the Ka-29TB (Helix-B) which fills the role of an "assault transport" helicopter. The Helix-B can hold 16 troops in addition to two pilots.
Developed as a replacement for the Ka-25, the Ka-27 was first flown during December 1974, before undergoing operational evaluation in mid 1981. First observed by NATO while aboard the destroyer Udaloy, the Ka-27 began replacing the Ka-25 in AV-MF service in 1982, with 100 examples in service by late 1990.
Like other Kamov designs, the Ka-27 Helix was designed with a co-axial rotor system, eliminating the need for a tail rotor. The first prototype of the Helix flew in December 1973, however it was not officially introduced into service until 1982.
The Ka-27 is similar in size to its predecessor, the Ka-25, due to the fact that it was intended to replace the aging Ka-25 design and had to fit in the same hangars.
The Ka-27 Helix may be equipped with radar, magnetic anomaly detection, dipping sonar, and/or sonobuoys. The Kamov Ka-31 was a limited variant designed specifically for maritime reconnaissance.
For anti-submarine warfare, the Helix can hold 1 torpedo or 36 sonobuoys.
The Ka-29TB Assault Transport Helix variant can be upgraded with a forward-firing 7.62mm machine gun, 1 30mm Shipunov 2A42 autocannon, and has 4 external hardpoints for bombs, rockets, gunpods, missile launchers, and other munitions. This variant can also carry up to 16 troops.
- Ka-27PL Helix A: Standard initial version
- Ka-29TB Helix B: Modified version with wider forward cabin
- Ka-32T: Civilian model lacking offensive equipment and radar.
Engines: 2 Isotov TV3-117
Top Speed: 250km/h
Rotor diameter: 16m