OVERVIEW: The AIM-7E-4 Sparrow III is a medium-range, semi-active radar-guided air-to-air missile designed for beyond-visual-range engagements, featuring improved reliability, electronic counter-countermeasures (ECCM), and enhanced performance over earlier Sparrow E variants.

DETAILS: The AIM-7E-4 was developed as a response to performance issues observed in earlier AIM-7E variants, particularly against maneuvering or ECM-equipped targets. It featured enhanced guidance electronics and better resistance to electronic jamming, increasing kill probability in combat. Though retaining the same airframe and propulsion as its predecessors, internal modifications made it more reliable and effective in BVR engagements. It remained in service until gradually replaced by the AIM-7F in the late 1970s.

SPECIFICATIONS:
Guidance: Semi-active radar homing
Warhead: 30.5 kg high-explosive blast-fragmentation
Accuracy: Improved ECCM; still dependent on radar lock
Length: 3.66 m
Diameter: 0.203 m
Wingspan: 0.81 m
Total Weight: 230 kg
Platforms: F-4 Phantom II, F-14 Tomcat, F-15 Eagle, F-104S

Range: 35 km (altitude and launch conditions dependent)
Speed: Mach 4+
Maneuverability: up to 18–20 g during terminal phase (limited against high-G targets)

NOTES:
IOC: 1973 (entered service as the final AIM-7E model)
Operators: United States, United Kingdom, Canada, Australia, Japan, Italy, Germany, Greece, Turkey, Israel, Saudi Arabia, Iran (pre-1979), South Korea, Taiwan, Spain, Egypt, Thailand, Pakistan, Jordan
Combat Use: Used in late Vietnam War air engagements, including Operation Linebacker I & II; also exported to NATO and allied air forces
Interesting Fact: The AIM-7E-4 addressed many of the failings of earlier Sparrow versions in Vietnam, achieving significantly better performance and forming the bridge to the digital AIM-7F.

SOURCES:
Federation of American Scientists (FAS); U.S. Navy Fact File (Archived); Raytheon Missiles & Defense; Jane’s Air-Launched Weapons; National Museum of the U.S. Air Force; “Clashes: Air Combat over North Vietnam” by Michel III, Marshall L.; SIPRI Arms Transfers Database; en.wikipedia.org