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Ka-31

 Ka-31 Engine. dimensions. story. Range of flight. static ceiling

The Ka-31 (product 503, NATO codification Helix-B) - radar picket helicopter, designed for the needs of the Soviet Navy. Helicopter AWACS was developed based on the Ka-29 ship-existing transport-combat helicopter. The helicopter can be based both on the ships of the most varied classes, and on land.

The Ka-31 – video

Place-based helicopter Ka-31 can act all ships, able to take on board their helicopters Ka-27 and Ka-29. The helicopter can be used in the onshore option for solving problems of air defense of ground troops. To date, the helicopter has not analogues in the world.

Helicopter is on the Russian Navy, for information on 2012 year is on the Navy arsenal 2 of the helicopter. Also, the Ka-31 is exported and is on India and China naval aviation arms. India has 9 helicopters of this class, while in 2009 he was awarded a contract for the supply of another 5 these helicopters (helicopter costs about 20 million. dollars per unit). On the naval aviation arms to China 2012 year was also 9 Ka-31 helicopters.

 Ka-31 Engine. dimensions. story. Range of flight. static ceiling

Helicopter AEW Ka-31 radar for the control of air and sea space, early detection in the outer reaches of low-flying targets such as cruise missile, helicopter, aircraft, as well as surface ships and their identification. The helicopter is able to determine the parameters of the trajectory and the coordinates of targets, transmit information about the observed and air radar environment on ships and land forces command posts.

The Ka-31 is formed by a coaxial helical pattern. Support system and powerplant machines were borrowed from the Ka-29 transport helicopter. Change of its design were dictated by the need to install the bottom of the helicopter radar antenna, that during the flight is able to turn on a special hinge device and takes the operating vertical position. Swipe mirror radar antenna, mounted on Ca-31, is 6 m. In the stowed position, this antenna is pressed against the bottom of the body of the helicopter and fixed.

In order to ensure the entry and exit of the crew on the starboard side of the transport helicopter cockpit door was installed. On the sides of the cockpit escape hatch was installed instead of the usual sliding doors with sliding glazed doors, emergency release system having. The helicopter had Four chassis, with the front feet are cleaned in special fairings, which are located outside on the sides of the helicopter fuselage. The main landing gear climbed up, freeing space for rotation of the radar antenna in flight. Main rotor blades are made of composite polymer materials and fitted and the electrothermal deicing system.

 Ka-31 Engine. dimensions. story. Range of flight. static ceiling

The history of creation and features

The need for funds AEW Sea was clearly demonstrated during the Anglo-Argentine conflict over the disputed Falkland Islands. Due to the lack of a part of the British Expeditionary Force helicopters and AWACS aircraft, they could not timely search, detection and subsequent intercept low-flying Argentine aircraft. Use this as destroyers ended unsuccessfully for the British - losses of 2 such ships ("Coventry" and "Sheffield").

Taking into account the military conflict, at 1985 by OKB. n. AND. Kamov given the task to create AEW helicopter. When creating the Ka-31 The basis was taken Glider, powerplant and support system has produced the Ka-29 transport helicopter. The main difficulty in its development was in conjunction with the rest of powerful radar helicopter flight and navigation equipment, and ensuring stability of the helicopter in the air during rotation of the radar antenna. Its first flight prototype of the new helicopters in 1987 year. After a series of relatively long test, car in 1995 It was adopted in the Russian Navy Naval Aviation. Serial production of the helicopter was carried out in the factory, located in Kumertau.

The Ka-31 was designed to detect air targets, as well as surface ships and their escorts. Shipborne helicopter is designed to provide air defense combat fleet connections, which operate outside the area AWACS aircraft and shore radar. This helicopter has no analogues in the world helicopter. The basis of his on-board complex is quite a powerful radar in the solid-state elements, that for the operation mode in the circular scan is manufactured in flight with a flat antenna phased array antenna (Phare). In the stowed position the antenna is located just below the bottom of the fuselage.

 Ka-31 Engine. dimensions. story. Range of flight. static ceiling

Mounted on a helicopter avionics system allows Ka-31 to conduct automated flight on a pre-programmed route in any climate and weather conditions. AWACS radar allows the helicopter to simultaneously detect and automatically track up 20 goals.

Information on all detected targets automatically transmitted via telecode link at the various control points. Ka-31 system is installed AEW "Eye" (E-801), established in Nizhny Novgorod Research Institute of Radio Engineering. During normal flight it adheres to the bottom surface of the fuselage of the machine, creating a minimum aerodynamic resistance. When translating the antenna in the operating position is deflected downward on 90 degrees, while the helicopter landing gear slightly lifted up, to the chassis does not interfere with the radar in rotation mode. Radar with phased array weighs 200 kg, antenna area is 6 quarter. m, and its length 5,75 m. The antenna is able to provide support for subsequent detection and to 20tseley. class "fighter" Goals are discovered at a distance of 100-150 km, and surface targets of class "ship" are detected at a distance of 250-285 km.

The Ka-31 is equipped with a flight and navigation system (PNA), developed in the Instrument Design Bureau in Saratov. While, when the radar antenna is in an extended, operating position, Helicopter PNA provides stabilization angular positions, as well as the true or barometric altitude; flight to patrol the zone on standard trajectories; automatic withdrawal machines at the airport or ship; output to commit point landing with landing radar signals via. Available radio system of the helicopter range navigation enables continuous reading of the geographical coordinates Ca-31 (latitude and longitude), as well as automated vertoletovozhdenie on a pre-programmed route and then return to their home point.

 Ka-31 Engine. dimensions. story. Range of flight. static ceiling

For transmission of information received on the tactical situation of open and closed channels telecode connection helicopter AEW Ka-31 is a special communications system. At an altitude of flight level 1500-3000 telecode meters transfer information from the aircraft available at a distance of not less than 150 km. In this case automatic recording of flight parameters is performed by means of a special magnetic recording apparatus "Tester-3K".

In the case of helicopter ground forces Ka-31 can be deployed in small unprepared grounds, located near the cell-launched missiles, providing them with targeting.

modifications

Ka-31R – Helicopters of this modification were armed with complex BCS-252.

Ka-31SV – (Ka-35) for the Russian Navy. A helicopter from the helicopter complex radar reconnaissance of ground targets (VKRRNTS) 1K130 (OCD "1K130", the complex includes products 23D2, 9S925, 1I140).

 Ka-31 Engine. dimensions. story. Range of flight. static ceiling

Performance characteristics of Ca-31

– Getting Started: 1995 year
– units produced: >35

The cost of the Ka-31

– 454 million rubles (2008 year)

The crew of the Ka-31

– 3 man

Overall dimensions of the Ka-31

– The diameter of the rotor: 15,90 m
– fuselage length: 11,60 m
– The width of the fuselage: 3,80 m
– Height: 5,50 m

Weight Ka-31

– Empty: 5520 kg
– Normal takeoff weight: 11400 kg
– Maximum takeoff weight: 12500 kg

Engines Ka-31

– amount, a type, mark: 2 h TVZ-117VMA
– Power: 2 x 2200 l. from.
– Secondary power system: TA-8K
– Equivalent air power: 107 kW

Speed ​​Ka-31

– Cruising speed: 220 kmh
– full speed: 250 kmh

Flight range of the Ka-31

– 680 km

Static ceiling Ka-31

– 3500 m

Dynamic ceiling Ka-31

– 5000 m

Photo Ka-31

 Ka-31 Engine. dimensions. story. Range of flight. static ceiling

 

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