The AGM‑131 SRAM II (Strategic, Reconnaissance, Attack, Missile II) was a United States Air Force project to develop a next‑generation air‑launched, nuclear‑armed, short‑range missile intended to replace the AGM‑69 SRAM in the strategic bomber fleet.
Development history
- Initiation: The program was launched in the early 1970s as part of the Air Force’s effort to modernize its nuclear strike capabilities following the deployment of the B‑52 and the planned introduction of the B‑1B Lancer.
- Design goals: The missile was to provide a high‑speed, low‑observable weapon capable of delivering a single nuclear warhead with a range sufficient to allow bombers to release the weapon beyond the effective reach of enemy air defenses, while maintaining compatibility with existing aircraft payload configurations.
- Manufacturers: Development was contracted primarily to General Dynamics (later part of Lockheed Martin) and other aerospace subcontractors.
Planned specifications (subject to change during development; definitive values were never publicly released)
- Guidance: Inertial navigation system with potential for terminal radar or infrared homing.
- Propulsion: Solid‑propellant rocket motor.
- Dimensions: Approximate length 12–13 ft (3.7–4.0 m) and diameter around 1.5 ft (0.46 m).
- Weight: Estimated at 2,300–2,500 lb (1,040–1,130 kg).
- Range: Projected operational range between 200 and 300 km (110–165 nm).
- Warhead: Designed to carry a single nuclear warhead comparable to the W68 used on the AGM‑69.
Program status and cancellation
By the mid‑1980s, the AGM‑131 SRAM II had progressed to prototype testing, but several factors led to its termination:
- Strategic shift: The United States adopted a policy emphasizing survivable, long‑range missile systems (e.g., the Air‑Launched Cruise Missile) and reduced reliance on large numbers of short‑range nuclear air‑launched weapons.
- Budget constraints: Defense spending reductions in the late 1980s limited funding for new nuclear weapons programs.
- Technical challenges: Developmental difficulties related to guidance accuracy and integration with emerging bomber platforms contributed to delays.
The program was formally cancelled in 1990, and the AGM‑131 SRAM II never entered operational service. No units were field‑tested in combat, and the missile remains a historical example of Cold‑War era nuclear weapons development that was halted before deployment.
Legacy
Although the AGM‑131 never materialized, research and technology from the program informed later air‑launched missile projects and contributed to advancements in solid‑propellant motors, miniaturized nuclear warheads, and low‑observable airframe design.
References
- United States Department of Defense archival documents on missile development programs (1970s–1990s).
- Jane's Strategic Weapon Systems, editions covering the 1980s.
Note: Specific performance parameters of the AGM‑131 SRAM II were not publicly disclosed before the program’s cancellation; the figures presented reflect the best available open‑source estimates.
