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Kamov Ka-25 (Hormone) Anti-Submarine Helicopter (1966)

Authored By Staff Writer | Last Updated: 2/26/2014

Some 25 total variants of the base Kamov Ka-25 appeared throughout the systems production life.

The Kamov Ka-25 (NATO codename of "Hormone") was developed from the Ka-20, which itself was a response to a Soviet Navy requirement for a ship-borne helicopter to replace the aging Mil Mi-4 platforms. The Ka-25 became a mainstay on Soviet surface warships throughout the Cold War and played a major role in anti-submarine warfare for decades. The aircraft has since been replaced in service by the more capable Ka-32 series - another Kamov design.

The Kamov Ka-25 is a highly-recognizable helicopter for many reasons. Most notably are the twin main rotors, coaxially mounted and negating the need for a tail rotor. The elimination of the tail rotor, commonly found on traditional helicopters, means that the Ka-25 can be built to a shorter-in-length specification - a priceless attribute when considering onboard storage for a navy warship. Additionally, the stout fuselage design and tri-fin tail section are clear indicators of a Kamov design. This basic appearance is carried on in the Ka-27, Ka-28, Ka-29, Ka-31 and the Ka-32.

Crew accommodations amount to a pilot and copilot seated at front, side-by-side. if properly equipped, the cabin can provide seating for up to 12 passengers. Traditionally, the system is designed for naval operations in the way of anti-submarine warfare (ASW) and search and rescue (SAR) operations, meaning cabin space is utilized for specialized equipment. Armament can vary depending on the mission but traditionally, the Ka-25 is set up to take on two air-to-surface torpedoes and/or conventional and nuclear depth charges.

No fewer than 450 Ka-25's were produced and delivered to the Soviet Union and Ukraine along with India and Syria. The type has slowly been removed from frontline service in the Russian Navy though it may continue in some quantity with other navies. The Ka-25BSh represents the dedicated ASW variant and the Ka-25PS represents the dedicated SAR variant of the Hormone brand.

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Specifications for the
Kamov Ka-25 (Hormone)
Anti-Submarine Helicopter

Focus Model: Kamov Ka-25PL (Hormone)
Country of Origin: Soviet Union
Manufacturer: Kamov - Soviet Union
Initial Year of Service: 1966
Production Total: 460

Crew: 2 + 12

Length: 31.99 ft (9.75 m)
Width: 0.00 ft (0.00 m)
Height: 17.62ft (5.37 m)
Weight (Empty): 10,505 lb (4,765 kg)
Weight (MTOW): 16,535 lb (7,500 kg)

Powerplant: 2 x Glushenkov GTD-3F turboshaft engines delivering 900shp driving 2 x 3-bladed coaxial main rotors.

Maximum Speed: 130 mph (209 kmh; 113 kts)
Maximum Range: 249 miles (400 km)
Service Ceiling: 10,997 ft (3,352 m; 2.1 miles)
Rate-of-Climb: 0 feet-per-minute (0 m/min)

Hardpoints: 2
Armament Suite:
Depends on mission type (SAR or ASW). Mission-Specific ordnance held in an internal weapons bay or external box. May include:

2 x air-to-surface torpedoes
Nuclear Depth Charges
Conventional Depth Charges

Ka-20 - Initial Model Development and basis for Ka-25 design.

Ka-25 - Production Model Designation

Ka-25PL "Hormone-A"

Ka-25T "Hormone-B" - Target Acquisition and Missile Guidance Variant.

Ka-25PS "Hormone-C" - Dedicated Search and Rescue (SAR) Variant; passenger ready.

Ka-25BSh - Primary Anti-Submarine Warfare (ASW) Model.

Ka-25BShZ - Mine Sweeper Tow

India, Syria, Ukraine; Russia; Soviet Union