Description[edit]

The missile is designed to engage vital ground targets, including armoured targets fitted out with built-in and add-on explosive reactive armor, at a range of up to 8 km when fired from a helicopter and 10 km when fired from a fixed-wing aircraft in daytime and up to 5 km at night, as well as air targets in conditions of air defense assets activity.

The Vikhr-1 missile is part of the Vikhr-M system, which also includes an automatic sight and a depressible launcher. Adopted in 1990.^[8][9]

The automatic sight is provided with TV and IR channels for target sighting, a laser beam channel for missile control, a laser rangefinder, an automatic target tracking unit, a digital computer and a system for stabilization and aiming the sighting and beam channels. The automatic sight provides for target detection and identification both by day and night, automatic target tracking and missile guidance, and generates exact information for gun and rocket firing. The guided missile consists of a HEAT fragmentation warhead fitted with a contact and a proximity fuze, an air-dynamic control actuator, control electronics, a motor and laser detector. It is kept in a sealed launching transporting container.

The multi-purpose warhead (two-stage HEAT and an additional fragmentation sleeve) allows the missile to be used against armoured, airborne and area targets alike. This is an advantage compared to the three different missiles required in the 9M120 Ataka-V complex. The use of the proximity fuze allows a near miss of up to 5 m and makes it possible to engage an air target at speeds of 500 m/s.

The Vikhr missile laser beam control system provides for its precise guidance owing to data transmission to the missile in the course of its launch, which is excluded in homing systems. The Vikhr missile control system has high jamming immunity because its receiver faces the carrier, thereby protecting it from jamming signals.

The high pinpoint target hit probability (reported 0.95 against stationary targets) is provided by the automatic target tracking system and highly accurate missile control system that makes allowance for changes in the parameters of the carrier and the target in the course of firing.

The missiles can be fired singly or in pairs (at the same target to increase lethality). The high flight speed allows it to engage targets rapidly. The system is capable of launching Vikhr missiles against two to four targets during a 30-second period and starting at a range of 10 km, which increases its lethality to three to four times that of earlier systems.

Work began on an anti-radar missile derived from the Kh-66^[5] in 1972, using a passive radar seeker and SUR-73 autopilot.^[6] The long-range Kh-31 anti-radar missile came out of the same project.^[6] The Kh-27 began state testing on a MiG-27 on 8 August 1975^[6] but did not enter service until 2 September 1980.^[6] It was assigned the NATO reporting nameAS-12 'Kegler' and in effect it replaced the much heavier Kh-28 (AS-9 'Kyle').^[5]

In 1973 Victor Bugaiskii was appointed head engineer of the bureau and he started work on combining the Kh-23M, Kh-25 and Kh-27 into a single modular system to reduce costs and improve tactical flexibility.^[6] This was completed by the end of 1978,^[6] resulting in the Kh-25MP (anti-radar), Kh-25ML (laser-guided) and Kh-25MR (radio-guided) family. NATO continued to refer to these as the AS-12 and AS-10 respectively, even though they could now be switched by a simple change of seeker head.

Work began on an anti-radar missile derived from the Kh-66^[5] in 1972, using a passive radar seeker and SUR-73 autopilot.^[6] The long-range Kh-31 anti-radar missile came out of the same project.^[6] The Kh-27 began state testing on a MiG-27 on 8 August 1975^[6] but did not enter service until 2 September 1980.^[6] It was assigned the NATO reporting nameAS-12 'Kegler' and in effect it replaced the much heavier Kh-28 (AS-9 'Kyle').^[5]

In 1973 Victor Bugaiskii was appointed head engineer of the bureau and he started work on combining the Kh-23M, Kh-25 and Kh-27 into a single modular system to reduce costs and improve tactical flexibility.^[6] This was completed by the end of 1978,^[6] resulting in the Kh-25MP (anti-radar), Kh-25ML (laser-guided) and Kh-25MR (radio-guided) family. NATO continued to refer to these as the AS-12 and AS-10 respectively, even though they could now be switched by a simple change of seeker head.

• Kh-29T (Izdeliye 64, 'Kedge-B')^[10] is the TV-guided version which is fitted with automatic optical homing to a distinguishable object indicated by the pilot in the cockpit.

Like other Soviet missiles of the time, the Kh-58 could be fitted with a range of seeker heads designed to target specific air defence radars such as MIM-14 Nike-Hercules or MIM-104 Patriot.^[3]

• Kh-58U - improved version with longer range and lock-on-after-launch

• S-25-OF with high explosive-fragmentation warhead
• S-25-O with fragmentation warhead and radio proximity fuze
• S-25-OFM for use against hardened targets
• S-25L (LD) laser guided variant

Although originally designed as an anti-ship missile, the missile was eventually developed into an air-to-surface missile that can engage various targets. When used as an anti-ship missile, its intended targets are boats with 180 ton displacement or less, such as missile or torpedo armed FAC, patrol boats, and gunboats.

There are two types of guidance: the Fire-and-forget mode and the command mode. The first type of guidance enables the aircraft/boats/vehicles to get out after launching, providing greater safety while the second type enables the operator to change targets after launching, or to terminate the attack if needed. The television seeker of the missile can be replaced by either an imaging infrared seeker or a millimetre-wave radar seeker. A version with a radar seeker (not the millimetre-wave radar seeker) designated as C-701R has also been displayed in public.