BLU-109

BLU-109. The BLU-109 is an American hardened target penetration bomb designed to destroy heavily fortified structures. Entering service with the United States Air Force in 1985, it is a key component of the U.S. military's air-to-ground arsenal. The bomb is commonly integrated with precision guidance kits like the Joint Direct Attack Munition to form guided bomb units for use in major conflicts.

Design and development

The weapon was developed in response to lessons learned during the Vietnam War, where existing general-purpose bombs proved inadequate against hardened targets like aircraft shelters and command bunkers. Its design centers on a thick, high-strength steel casing forged from a single piece of alloy steel, enabling it to penetrate several feet of reinforced concrete before detonation. The fuse is a critical component, with later models utilizing the Hard Target Smart Fuse which delays explosion until after penetration. Primary contractors included General Dynamics for the bomb body and Lockheed Martin for integration with guidance systems, with testing conducted at sites like Eglin Air Force Base.

Operational history

The BLU-109 saw its first major combat use during the Gulf War in 1991, where it was employed by aircraft like the F-117 Nighthawk against Iraqi command centers and weapons storage facilities. It was used extensively throughout the NATO bombing of Yugoslavia and subsequent operations in Afghanistan and Iraq, including during the 2003 invasion of Iraq. The Israeli Air Force has also deployed the bomb in various campaigns. More recently, variants have been used by the Royal Air Force's Eurofighter Typhoon and have been supplied to the Ukrainian Air Force for use against Russian fortifications during the Russian invasion of Ukraine.

Specifications

The bomb weighs approximately 2,000 pounds (900 kg) and contains about 550 pounds (250 kg) of Tritonal high explosive. Its casing is roughly 8 inches (20 cm) thick at the nose, made from a single forging of 4340 steel. The overall length is about 7.5 feet (2.3 m). It is designed to be released from medium to high altitudes and can achieve penetration capabilities against targets like runways, bridge abutments, and hardened hangars. The weapon is compatible with a wide range of U.S. and allied aircraft.

Variants

The primary variants are created by mating the bomb with different guidance and control kits. The GBU-24 Paveway III and GBU-27 Paveway III are laser-guided versions, the latter designed specifically for the F-117 Nighthawk. The GBU-31 Joint Direct Attack Munition is a GPS-guided variant. The GBU-15 is a TV-guided version. The BLU-109/B is the standard penetrator warhead, while the BLU-116 Advanced Unitary Penetrator is a follow-on variant with an enhanced, denser casing. The Massive Ordnance Penetrator represents a significantly larger next-generation weapon for similar missions.

Category:American bombs Category:Aerial bombs of the Cold War Category:Penetrator bombs