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Ch-58

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Ch-58

H-58U AS-11 Kilter 2008 G1.jpg

General information
Type Air-to-ground missile
Native name Ch-58
NATO designation AS-11 Kilter
Country of origin Soviet Union 1955Sowjetunion Soviet Union / RussiaRussland Russia
Manufacturer КТРВ (Tactical Missile Corporation) / GosMKB Raduga
Development 1972
Commissioning 1982
Operating time in service
Technical data
Length 4800 mm
Diameter 380 mm
Combat weight 640 kg
Span 1450 mm
Drive Solid rocket motor
Speed Mach >3.5
Range 60-250 km
Equipment
Steering INS
Destination Radar receiver
Warhead 149 kg fragmentation warhead with incendiary effect
Detonator Laser – proximity fuse
Weapons platforms Aircraft
Lists on the subject

The Ch-58(Russian Х-58, NATO code name AS-11 Kilter) is a Soviet-made air-to-ground missile. It is used to combat ground-based radar installations.

Development

The Ch-58 was developed as a successor to the Ch-28, which was equipped with a liquid propellant engine. The goal was to develop an anti-radar guided missile which would achieve a range of about 100 km with a solid-fuel rocket engine. Development began in 1972 at the Raduga design bureau in Moscow. The Mikoyan-Gurevich MiG-25BM and Sukhoi Su-24 were to be used as primary operational platforms.[1] The first flight tests were conducted in 1977 with a modified Antonov An-12. Finally, the Ch-58 was introduced to the Soviet Air Force in 1982. The Ch-58 was presented to the public for the first time in 1989. The Ch-58 is the Russian equivalent of the American AGM-88 HARM.

Technology

The Ch-58 is used in the defeat of enemy air defense (English SEAD). Its seeker switched to the frequency of the enemy radar and uses this to hit the radar display. For this the Ch-58 used the PRGS-58 seeker. This has interchangeable modules which are tuned to the frequency bands of the anti-aircraft missiles Nike Hercules, Bloodhound, Hawk and Patriot.[2]

The surface of the streamlined fuselage of the Ch-58 is made of a heat-resistant titanium alloy. This alloy is heat resistant up to 400-500 °C.[3] An additional thermal insulation layer is applied to the missile tip. Four control and stabilization surfaces are attached to the missile. The Ch-58 is propelled by a high-energy dual-pulse engine solid rocket motor manufactured by OKB Soyuz.

To detect radar radiation, the mission aircraft must be equipped with a special radar receiver. For the MiG-25 this is the Jaguar system integrated in the aircraft. For the Su-24 the externally carried nacelles L-086A Fantasmagoria-A and L-086B Fantasmagoria-B are used.[3] The Su-17 and Su-22 use the Metel external nacelle.[4] The radar receiver analyses the radar radiation and determines the course data for the Ch-58 guided missiles. If sufficient target data are available, they are passed on to the SAU-58 navigation system of the guided missile. The guided missile can then be launched from an altitude range of 200-20,000 m and a speed range of Mach 0.47-2.35.[1] From a launch altitude of 200 m, it has an operational range of 60 km. When launched at Mach 1.5, from an altitude of 18,000 m, this value is 250 km.[4]

After the drop, a short propulsionless phase followed. Only at a safe distance from the aircraft does the rocket engine ignite. After launch, the missile’s trajectory describes a semi-ballistic curve. With the help of the seeker head and the autopilot, the Ch-58 flies towards the radar facility. If the radar system stops transmitting during this time, the Ch-58 maintains the course it has set and flies to the target using the inertial navigation platform.[5] If the radar system resumes transmitting, the passive radar seeker immediately switches back to it. Starting with the Ch-58U version, target acquisition can also be performed after takeoff.[2] In this case, the Ch-58 is launched into an area without a known target position. Once in the target area, the guided missile detects radar emissions with the passive seeker head. If the radar emission of a radar unit is detected, an attack is made on it. If no target is detected, the guided missile explodes after a certain flight time by means of self-destruction. The warhead is detonated by means of the ROV-20 laser proximity fuse. According to the manufacturer, the hit expectancy is around 80% and the radius of coverage (CEP) is 10m. The incendiary fragmentation warhead weighs 149 kg and has an explosive content of 58.5 kg.[6]

Variants

  • Ch-58: 1st series version. Range 80-120 km.
  • Ch-58U: 2nd series version with new engine, improved PRGS-58M seeker with the possibility of target acquisition after take-off. Range 120-160 km.
  • Ch-58E: Version with improved electronics and broadband seeker (1.2-11 GHz). Range 80-245 km.
  • Ch-58USchK: Version with 4.18 m fuselage and foldable wings for use in weapons bays, introduced in 2012. With new 9B-7735K broadband seeker. Range 80-245 km.[7]
  • Ch-58USchK IIR: version with foldable wings for use in weapon bays, presented at MAKS 2015. With additional IR camera with digital image processing. Range 80-245 km.[8]
  • Ch-58A: Prototype with active radar seeker inKu-band, range 120-180 km.

Carrier aircraft

  • Mikoyan-Gurevich MiG-25BM “Foxbat”
  • Mikoyan-Gurevich MiG-31BM “Foxhound”
  • Suchoi Su-17M3/M4 “Fitter”
  • Sukhoi Su-20 “Fitter”
  • Sukhoi Su-22M “Fitter”
  • Suchoi Su-24M “Fencer”
  • Sukhoi Su-25UB “Frogfoot”
  • Sukhoi Su-30M “Flanker”
  • Sukhoi Su-57

Comparable ARM

  • AGM-78 Standard ARM
  • AGM-88 HARM
  • ALARM
  • AS.37 Martel

Individual references

  1. a b The AS-11 Kilter air-to-ground guided missile system DTIG – Defense Threat Information Group, August 1999
  2. a b Michal Fiszer: Crimson SEAD. Journal of Electronic Defense (JED), January 2003.
  3. a b airwar.ru, accessed May 16, 2014
  4. a b rbase.new-factoria.ru, retrieved 16 May 2014 (Russian)
  5. Horizon House, Journal of Electronic Defense Staff Horizon House International Electronic Countermeasures Handbook, 2004 Edition, p. 149
  6. ausairpower.net, accessed: 16 May 2014
  7. Piotr Butowski: Russia is preparing a precision guidance revolution for its fast jet, strike, and bomber forces. Jane’s International Defence Review, August 2014, United Kingdom, 2014.
  8. MAKS 2015: KRTV adds IR seeker to Kh-58UShK anti-radiation missile – janes.com, accessed 31 August 2015.