Small Diameter Bomb

Small Diameter Bomb. The Small Diameter Bomb is a class of precision-guided munition developed by Boeing for the United States Air Force and United States Navy. Designed to provide a low-collateral-damage strike capability from significant standoff ranges, it allows modern combat aircraft to carry a greater number of weapons per sortie. The program has evolved through multiple generations, enhancing its all-weather performance and network-enabled targeting against mobile threats.

Overview

The Small Diameter Bomb program was initiated to address requirements for a next-generation, air-dropped munition that could achieve precise effects while minimizing unintended damage. It is a key component of the United States Department of Defense's broader shift towards networked warfare and increased magazine depth for platforms like the F-15E Strike Eagle and F-35 Lightning II. The weapon's compact size allows a single aircraft to engage multiple targets in a single pass, a concept central to modern aerial warfare doctrine. Its development and fielding have been influenced by operational experiences from conflicts such as the War in Afghanistan and the Iraq War.

Development

Development of the Small Diameter Bomb began in the early 2000s under a contract awarded to Boeing by the United States Air Force's Air Armament Center. The initial increment, focused on a GPS-aided weapon for striking fixed targets, faced competition from other aerospace firms like Lockheed Martin. Following successful testing at ranges like the Eglin Air Force Base and the Naval Air Weapons Station China Lake, the GBU-39/B was declared operational in 2006. A subsequent development phase, Increment II, aimed at creating a tri-mode seeker for engaging moving targets in adverse weather, experienced significant technical challenges and schedule delays before the GBU-53/B StormBreaker entered production.

Design and variants

The baseline GBU-39/B variant features a GPS/INS guidance package and a penetrating warhead designed for hardened targets. Its compact, diamond-shaped airframe and pop-out wings provide a high glide ratio, enabling release from over 60 nautical miles away. The more advanced GBU-53/B StormBreaker incorporates a tri-mode seeker combining millimeter wave radar, imaging infrared, and a semi-active laser, allowing it to engage moving targets like vehicles and ships. Both variants are designed for carriage on the BRU-61/A four-pack smart rack, significantly increasing the loadout of aircraft such as the F/A-18E/F Super Hornet and the B-1 Lancer.

Operational history

The Small Diameter Bomb was first used in combat by the United States Air Force during operations in Iraq and has since been employed extensively by United States Central Command assets across the Middle East. It has been a weapon of choice for the international coalition against the Islamic State of Iraq and the Levant, used in strikes on infrastructure and high-value targets in urban environments like Mosul and Raqqa. The Israeli Air Force has also reportedly employed the weapon in operations over Gaza and Syria. The GBU-53/B achieved initial operational capability with the United States Navy in 2022, integrating with the F-15EX Eagle II and other platforms.

Operators

The primary operator of the Small Diameter Bomb is the United States, with the United States Air Force and United States Navy as the lead services. The weapon has been exported to several key allies under the Foreign Military Sales program. These international operators include the Israeli Air Force, the Royal Australian Air Force, and the Finnish Air Force. Other nations, such as Norway and Poland, have either placed orders or are in the process of integrating the munition with their fleets of F-35 Lightning II aircraft. Category:Precision-guided munitions of the United States Category:Bombs of the United States Category:2000s in military history