is a medium to high altitude surface-to-air missile system. Over the
years at least four variants of the missile have been produced.
designation of the missile is the 2K11 Krug (circle)
The missile is launched by four solid booster rockets mounted
externally on the body. The missile is armed 300 metres from the
launch the boosters burn for about 15 seconds and then fall away when
the fuelled ramjet kerosene sustainer motor ignition speed of over
Mach 1 is attained at about 9 km from the TEL. The four fins are fixed
and the four wings, in two pairs, are hydraulically operated.
A battery typically has one TEL fitted with the 9M8M2 and two TELs
with the 9M8M1 missile, although some TELs may carry one missile of
each type. An electro-optical fire control system is fitted for use in
a heavy ECM environment. Targets are initially detected by the long
range LONG TRACK early warning E-band radar, which has a 150 km range
and 30 km maximum altitude coverage. LONG TRACK is mounted on a
lengthened version of the AT-T heavy artillery tractor with a large
van body added, and is also used for the SA-6 SAM.
The SA-4 TEL (Industrial Index designation 2P24) consists of a tracked
armoured chassis on top of which is mounted a hydraulically operated
turntable carrying two missiles. The launcher can be traversed by 360º
with the missiles being elevated up to an angle of 45º on their
launcher arms for launching. The vehicle's engine is to the right of
the driver with the remainder of the space in the vehicle taken up by
the crew and electronics.
Hatches for the other crew members are on
either side of the missile turntable. The torsion bar suspension
consists of seven dual rubber-tired road wheels with the drive
sprocket at the front and the idler at the rear, and four track return
rollers. The vehicle has an air filtration and overpressure NBC system
and an IR night vision system for the commander and driver but no
Reserve missiles are carried on Ural-375 (6 x 6) trucks, and reloading
the TEL takes between 10 and 15 minutes.
Medium to high
altitude surface-to-air missile
Lyulev Design Bureau
135kg blast fragmentation
Range 50km, speed Mach 2.5