K-100-1
Mockup of KS–172 in front of Su-30 in 1994
Type	air-to-air missile
Place of origin	India/Russia
Production history
Manufacturer	NPO Novator & DRDO
Specifications
Weight	748 kg (1,650 lb) (KS–172)[1]
Length	6.01 m (19.7 ft) + 1.4 m (4.6 ft) (KS–172)[1]
Diameter	40 cm (16 in) (KS–172)[1]
Warhead	HE fragmentation (KS–172)[1]
Warhead weight	50 kg (110 lb)
Engine	Solid-propellant tandem rocket booster (KS–172)[1]
Wingspan	61 cm (24 in) (KS–172)[1]
Operational range	At least 200km,[2] possibly 300–400 km (160-210 nmi)
Flight altitude	3 m (9.8 ft)–30,000 m (98,000 ft) (KS–172)[1]
Speed	"up to" 4,000 km/h (2,500 mph) (KS–172)[1]
Guidance system	inertial navigation with midcourse guidance and active radar for terminal homing (KS–172)[1]
Launch platform	Su-27, Su-30, Su-35,[3] Su-30MKI[1]

The Novator K-100 is a Indian/Russian air-to-air missile designed as an "AWACS killer"^[4] at ranges up to 300–400 km (160-210 mi). The missile has had various names during its troubled history, including Izdeliye 172 ('Article 172'), AAM-L (RVV-L), KS–172, KS-1, 172S-1 and R-172. The airframe appears to have been derived from the 9K37 Buk surface-to-air missile (SAM) but development stalled in the mid-1990s for lack of funds.^[4] It appears to have restarted in 2004 after a deal with India, who wants to produce the missile in India for their Su-30MKI fighters.

Contents 1 Development 2 Design 3 Operational history 4 Variants 5 Similar weapons 6 Notes and references 7 External links

[edit] Development

Modern airforces have become dependent on airborne radars typically carried by converted airliners and transport aircraft such as the E-3 Sentry and A-50 'Mainstay'. They also depend on similar aircraft for inflight refuelling (eg Vickers VC10), maritime patrol (eg CP-140 Aurora), reconnaissance and electronic warfare (eg Tu-16 'Badger' E & J) and C4ISTAR (eg VC-25 "Air Force One"). The loss of just one of these aircraft can have a significant effect on fighting capability, and they are usually heavily defended by fighter escorts. A long-range air-to-air missile offers the prospect of bringing down the target without having to fight a way through the fighter screen. Given the potential importance of "blinding" Western AWACS, Russia has devoted considerable resources to this area. The Vympel R-37 (AA-13 'Arrow') is an evolution of their R-33 (AA-9 'Amos') with a range of up to 400 km (220 nmi), and there have been persistent rumours - if little hard evidence - of an air-to-air missile with a range of 200 km (110 nmi) based on Zvezda's Kh-31 anti-radar/anti-shipping missile or its Chinese derivative, the YJ-91.

NPO Novator started work in 1991 on a very long-range air-to-air missile with the Russian project designation Izdeliye 172.^[3] Initially called the AAM-L (RVV-L), it made its first public appearance at the International Defence Exhibition in Abu Dhabi in early 1993,^[5] followed by the Moscow Air Show later that year.^[3] It was described as having a range of 400 km (220 nmi); the mockup on display had a strong resemblance to the 9K37M1 Buk-M (SA-11 'Gadfly'). Apparently some flight-testing was done on a Su-27, but it appears that the Russians withdrew funding for the project soon afterwards.

The missile resurfaced as the KS–172 in 1999,^[5] as part of a new export-led strategy^[6] whereby foreign investment in a 300 km (160 nmi)-range export model^[5] would ultimately fund a version for the Russian airforce.^[6] Again it appears that there were no takers.

In late 2003, the missile was offered again on the export market as the 172S-1.^[3] In March 2004, India was reported to have invested in the project and to be "negotiating a partnership" to develop the "R-172"^[7]. In May 2005 the Indians were said to have finalised "an arrangement to fund final development and licence produce the weapon" in a joint venture similar to that which produced the successful BrahMos cruise missile.^[8] Since then the missile has had a higher profile, appearing at the 2005 Moscow Air Show^[3] on a Su-30 as the K-172,^[4] and a modified version being shown at the 2007 Moscow Air Show designated as the K-100-1. This name first appeared in a Sukhoi document in 2006,^[3] and sources such as Jane's now refer to the missile as the K-100.^[3]

[edit] Design

The mockup shown in 1993 had a strong resemblance to the Buk airframe, but since the Indians became involved there have been some changes. An Indian magazine gave the specifications of the KS–172 in April 2004 as a core 6.01m long and 40 cm in diameter with a wingspan of 61 cm, with a booster of 1.4m, and 748 kg total weight.^[1] It had a solid fuel tandem rocket booster capable of speeds up to 4,000 km/h (2,500 mph), 12g manoevring, and an adaptive HE fragmentation warhead.^[1] Development would concentrate on the seeker head, autopilot, resistance to jamming and a steering system with 3D thrust vector control (TVC).^[1]

In May 2005 it was reported that there were two versions, with and without a rocket booster, with ranges of 400 km and 300 km respectively.^[8] At the MAKS airshow in August 2005, a range of 300 km was quoted for a streamlined missile with a small booster and fins on both booster and fuselage.^[4] However the model shown at the 2007 MAKS airshow under the name K-100 was closer to the original 1993 mockup in the photo above, with different-shaped fins that were further up the fuselage, and an even larger booster with TVC vents.^[9] At the same show it was shown under the wing of a Su-35BM, implying that at least two could be carried by Flanker-class aircraft rather than just one on the centreline.

Guidance is by inertial navigation until the missile is close enough to the target to use active radar for terminal homing.^[1] The K-100 has an enlarged (350 mm (14 in)) derivative of the Agat 9B-1103M seeker used in the Vympel R-27 (AA-10 'Alamo').^[2] It has a lock-on range of 40 km (22 nmi), described by an Agat designer as "one fifth or less of the overall range".^[2]

[edit] Operational history

As India is the main investor in the K-100, it would first see service on her Su-30MKI aircraft. Russia might be a customer, depending on funding. No in-service date has yet been suggested.

[edit] Variants

Photos of the K-100-1 at the 2007 Moscow airshow^[9] suggest that India is proceeding with the "big booster" long-range variant under that name. A shorter range version without the booster (K-100-2?), as proposed for the R-172 in 2005,^[8] might be used on smaller planes than the Su-30.

[edit] Similar weapons

• Vympel R-37 (AA-X-13/AA-13 'Arrow') was developed from the the Vympel R-33 (AA-9 'Amos') and is intended for the Sukhoi Su-35 Flanker-E, Su-37 Flanker-F, MiG 1.42 MFI and other future fighters.^[8] According to Defence Today the range depends on the flight profile, from 80 nautical miles (150 km) for a direct shot^[8] to 215 nautical miles (398 km) for a cruise glide profile.^[8] Jane's reports two variants, the R-37 and the R-37M; the latter has a jettisonable rocket booster that increases the range to "300-400km" (160–220nmi).^[3] Work on the missile appears to have restarted in late 2006,^[3] as part of the MiG-31BM programme^[3] to update the Foxhound with a new radar and ground attack capability.

• Kh-31 (AS-17 'Krypton') - the Chinese have licensed the anti-radar version (Kh-31P) of this Russian air-to-surface missile, and may be working on an "AWACS killer" variant of their YJ-91 derivative.^[8] The Russians claim the anti-shipping version, the Kh-31A, can be adapted for use as an AWACS killer.^[8]
• AIM-54 Phoenix - Now retired, a 100 nautical miles (190 km)-range missile that was carried by the US Navy's F-14 Tomcat.

[edit] Notes and references

[edit] External links

• sukhoi.ru - unofficial site with photos from MAKS air show; photos 10,12 and 13 show the K-100 on the ground of which maks2007d1013.jpg is perhaps the best.

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