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Ka-25 Hormone

The deployment of the Polaris naval strategic nuclear missile system in the USA acted as a catalyst accelerating development of aircraft carrying ships in the USSR. The Ka-25 Hormone helicopter was developed to meet a Soviet Naval Air Force specification for an anti-submarine helicopter for ship or shore-based use. The first Ka-25 prototype flew in 1961. Designed by the world's leading pioneer of co-axial helicopters, Nikolai I. Kamov (1902-1973) this Soviet AV-MF (naval aviation) anti-submarine warfare rotary wing aircraft was assigned to the Soviet Helicopter Carrier Moskva. The Hormone is powered by twin turbines, installed side-by-side above the cabin, that drive two, three-bladed coaxial, contra-rotating rotors. The contra-rotating rotors eliminated the need for an anti-torque tail rotor, and made a very compact design possible, with obvious benefits for shipboard operations. Hormone cannot hover or dip at night.


Country of Origin
RoleASW, Rcce
  • A is ASW:
  • B is OTH targeting;
  • C is utility / SAR

    B and C are unarmed
  • Similar Aircraft
    Rotor Diameter 51 ft., 8 in. / 15.7m
    Length 32 ft., 3 in. / 9.8m
    Height 17 ft., 7 in. / 5.4m
    Weight 16,100 lbs. / 7100kg
    Engine 2 x 900 shp Glushnekov GTD-3
    Maximum speed137 mph / 220kph
    Cruising speed / 195kph
    Ceiling 3500 meters
    Cruise range 216nm
    In-Flight Refueling No
    Internal Fuel na
    Payload 600 kg
  • A: Dipping sonar; 3 sonobuoys, MAD, Mushroom radar, EO sensor estimated to be FLIR.
  • B: Big Bulge radar, ESM data link
  • Drop Tanks none
    Armament E45-75A torp or B-1 DC. Nuclear DB
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    Maintained by Robert Sherman
    Originally created by John Pike
    Updated Saturday, June 17, 2000 3:09:30 PM