BLU-109 bomb
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| Function: | Free-fall penetration bomb (guided when equipped as JDAM or Paveway) |
| Length: | 7 ft 11 in (2.4 m) |
| Diameter: | 14.6 in (370 mm) |
| Weight: | 1,927 lb (874 kg) |
| Range: | Varies by method of employment |
The BLU-109/B is a hardened penetration bomb used by United States military aircraft. (BLU is an acronym for Bomb Live Unit.) It is intended to smash through concrete shelters and other hardened structures before exploding. The BLU-109/B has a steel casing about 1 inch (25.4 mm) thick, filled with 530 lb (240 kg) of Tritonal. It has a delayed-action fuze. The BLU-109 entered service in 1985. It is also used as the warhead of some marks of the GBU-15 electro-optically guided bomb, the GBU-27 Paveway III laser-guided bomb, and the AGM-130 rocket-boosted weapon. This weapon supposedly has the same penetration as the Small Diameter Bomb, meaning that it is likely for this weapon to be retired soon.[citation needed]
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