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| AIM-120 AMRAAM |
AIM-120 AMRAAM The Global Standard for Beyond-Visual-Range (BVR) Combat
The "Slammer" – Dominating the Skies Since 1991
The AIM-120 Advanced Medium-Range Air-to-Air Missile (AMRAAM) is an American all-weather, fire-and-forget missile equipped with active radar guidance. Nicknamed the "Slammer" by pilots, it is the world's most widely used beyond-visual-range (BVR) missile. Since its introduction, it has been credited with over 10 aerial victories and remains a cornerstone of modern air superiority.
System Specifications
| Feature | Details |
|---|---|
| Missile Type | Medium-range air-to-air missile |
| Builder / Manufacturer | Hughes / Raytheon |
| Unit Cost | US$386,000 (Base) / Over $1M (newer 120D variants) |
| Deployment | September 1991 |
| Engine | Solid-fuel rocket motor |
| Launch Mass | 152 kg (335 lb) |
| Dimensions | Length: 3.66m | Diameter: 0.178m | Wingspan: 0.526m |
| Speed | Mach 4 (4,900 km/h; 3,000 mph) |
| Operational Range |
AIM-120A/B: 50–70km AIM-120C: 50–120km AIM-120D: 50–180+ km |
| Payload (Warhead) | 18 kg WDU-41/B fragmentation explosive (23 kg for AIM-120A/B) |
| Guidance System | Active radar, Inertial guidance (INS) |
Evolutionary Variants
The AMRAAM has undergone several major upgrades to maintain its edge against evolving threats:
- AIM-120A/B: The original versions. The 'B' variant introduced the WGU-41/B guidance system with reprogrammable EPROM modules.
- AIM-120C: Features "clipped" fins designed to fit inside the internal weapons bays of stealth fighters like the F-22 Raptor and F-35 Lightning II.
- C-5 & C-7: C-5 introduced a larger rocket motor (WPU-16/B); C-7 enhanced guidance and jamming resistance.
- AIM-120D: The most advanced variant with a two-way data link, GPS-aided navigation, and a 50% increase in range over the C-7.
Guidance & Engagement Strategy
The AMRAAM is a "Fire-and-Forget" weapon, providing pilots the ability to engage multiple targets and break away immediately.
Initial Phase: The missile uses Inertial Navigation (INS). If the aircraft continues to track the target, it sends mid-course updates via data link.
Terminal Phase: Once the internal active radar seeker "locks" (mode: "Pitbull"), it becomes completely autonomous.
Warhead Trigger: It utilizes an active optical proximity fuse to detonate the high-explosive fragmentation payload near the target.
Surface-to-Air Capabilities
Beyond aerial combat, the AMRAAM has been successfully adapted for ground-based air defense:
- NASAMS: Developed by Norway (Kongsberg), used to protect high-value targets like the White House in Washington D.C.
- SLAMRAAM/CLAWS: US Army and Marine Corps initiatives for mobile point defense using Humvees.
Comprehensive Launch Platforms
The AMRAAM is compatible with a vast array of modern aircraft and ground systems:
- AV-8B Harrier II
- F-4 Phantom (Germany only)
- F-14 Tomcat (Trials only)
- F-15 Eagle (C, I, and S versions)
- F-16 Fighting Falcon (All versions)
- F/A-18 Hornet & Super Hornet
- F-22 Raptor
- F-35 Lightning II
- Eurofighter Typhoon
- Saab JAS 39 Gripen
- Panavia Tornado
- NASAMS Ground Platform
The Future: AIM-260 JATM
To counter long-range threats like the Chinese PL-15, the US is developing the AIM-260 Joint Advanced Tactical Missile (JATM), which is expected to replace the AMRAAM starting in the mid-2020s as it reaches its physical limits.
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