BLU-109 /

B - U.S. Air przeciwbetonowa penetrating bomb. BLU - English acronym for Bomb Live Unit. The letter B stands fo r the version with folding fins. Designed for the destruction of concrete structures such as shelters, exploding only after their piercing. The hull has a thickness of a bomb about 25 mm and is filled with a cargo of Tritonal (80% TNT and 20% aluminum powder) weighing 530 pounds (240 kg). FMU-143 fuze for action zwłocznym is mounted on the tail of a bomb. BLU-109 was introduced to arms in 1985.