AIM-9 Sidewinder

AIM-9 Sidewinder
AIM-9L
Type	Short-range air-to-air missile
Place of origin	United States
Service history
In service	1956–present
Used by	See Operators
Wars	Second Taiwan Strait Crisis Vietnam War Falklands War 1982 Lebanon War Gulf War Israel–Hamas war
Production history
Manufacturer	Raytheon Company[1] Ford Aerospace Loral Corp.
Unit cost	US$381,069.74 (Block II) US$399,500.00 (Block II Plus) US$209,492.75 (training missile) (All as of 2019[2])
Produced	1953–present
Specifications
Mass	188 pounds (85.3 kg)[1]
Length	9 feet 11 inches (3.02 m)[1]
Diameter	5 in (127.0 mm)[1]
Wingspan	11 in (279.4 mm)
Warhead	WDU-17/B annular blast-fragmentation[1]
Warhead weight	20.8 lb (9.4 kg)[1]
Detonation mechanism	IR proximity fuze
Engine	Hercules/Bermite Mk. 36 solid-fuel rocket
Operational range	0.6 to 22 miles (1.0 to 35.4 km)[not verified in body]
Maximum speed	Mach 2.5+[1]
Guidance system	Infrared homing (most models) Semi-active radar homing (AIM-9C)
Launch platform	Aircraft, naval vessels, fixed launchers, and ground vehicles

The AIM-9 Sidewinder ("AIM" for "Air Intercept Missile") is a short-range air-to-air missile. Entering service with the United States Navy in 1956 and the Air Force in 1964, the AIM-9 is one of the oldest, cheapest, and most successful air-to-air missiles.^[3] Its latest variants remain standard equipment in most Western-aligned air forces.^[4] The Soviet K-13 (AA-2 "Atoll"), a reverse-engineered copy of the AIM-9B, was also widely adopted.

Low-level development started in the late 1940s, emerging in the early 1950s as a guidance system for the modular Zuni rocket.^[5][6] This modularity allowed for the introduction of newer seekers and rocket motors, including the AIM-9C variant, which used semi-active radar homing and served as the basis of the AGM-122 Sidearm anti-radar missile. Due to the Sidewinder's infrared guidance system, the brevity code "Fox two" is used when firing the AIM-9. Originally a tail-chasing system, early models saw extensive use during the Vietnam War, but had a low success rate (8% hit rate with the AIM-9E variant). This led to all-aspect capability in the L (Lima) version, which proved an effective weapon during the 1982 Falklands War and Operation Mole Cricket 19 ("Bekaa Valley Turkey Shoot") in Lebanon. Its adaptability has kept it in service over newer designs like the AIM-95 Agile and SRAAM that were intended to replace it.

The Sidewinder is the most widely used air-to-air missile in the West, with more than 110,000 missiles produced for the U.S. and 27 other nations, of which perhaps one percent have been used in combat. It has been built under license by Sweden and other nations. The AIM-9 has an estimated 270 aircraft kills.^[3]

In 2010, Boeing won a contract to support Sidewinder operations through the year 2055. Air Force spokeswoman Stephanie Powell said that its relatively low cost, versatility, and reliability mean it is "very possible that the Sidewinder will remain in Air Force inventories through the late 21st century".^[7]