R-33 (missile)

R-33 AA-9 Amos
R-33
Type	Long range air-to-air missile
Place of origin	Soviet Union
Specifications
Mass	490 kg (1,080 lb)
Length	4.14 m (13 ft 7 in)
Diameter	380 mm (15 in)
Wingspan	1.12 m (3 ft 8 in)
Warhead	47.5 kg (105 lb)
Engine	solid fuel rocket
Operational range	120 km (75 mi) - 1981[1] 160 km (99 mi) - 1999[2] 304 km (189 mi) - 2012[3]
Maximum speed	Mach 4.5 (R-37)[4]
Guidance system	inertial and semi-active radar homing; terminal active radar homing (R-33S)[5]

The R-33 (Russian: Вымпел Р-33, NATO reporting name: AA-9 Amos) is a long-range air-to-air missile developed by Vympel. It is the primary armament of the MiG-31 interceptor, intended to attack large high-speed targets such as the SR-71 Blackbird, the B-1 Lancer bomber, and the B-52 Stratofortress.

It uses a combination of semi-active radar homing for initial acquisition and mid-course updates, and inertial navigation to reach the target at extreme range. The Zaslon phased array radar of MiG-31 allows six missiles to be guided simultaneously at separate targets.

The R-33 AAM remains in service with the CIS and Russian forces (See MiG-31 operators).