GBU-28: Guided Bomb Unit-28

November 17, 2011 By The Editors

Recent News: September 23, 2011- Obama Sold Israel Bunker-Buster Bombs
President Obama has secretly authorized significant new aid to the Israeli military that includes the sale of 55 deep-penetrating bombs known as bunker busters.

Guided Bomb Unit-28 (GBU-28)
Source: Global Security
The GBU-28 laser guided bomb was developed, built, tested, and used in combat in a 17 day period. The deepest Iraqi bunkers were secure from the best penetrating bomb, the GBU-24A/B, with the I-2000 warhead. Coalition leaders required the capability to destroy these vital command and control facilities. Texas Instruments and Lockheed combined their efforts to build the 18 ft long bomb. TI adapted the seeker from the GBU-24 and Lockheed built the bomb body from discarded eight inch howitzer barrels. The Air Force initially contracted for 30 bombs but the cease fire started after only two were employed. Two more of the bombs were used in testing before the bombs were dropped in combat and the Air Force expended two or three more in additional tests after the war. The Air Force ordered an additional 100 GBU-28s with the BLU-113 (8 inch gun barrel) bomb body and stocks remained low due to the limited number of targets and the only fighter capable of employing it initially was the F-111F.

The Guided Bomb Unit-28 (GBU-28) bomb is designed to penetrate hardened targets before exploding, capable of penetrating 100 feet of earth or 20 feet of concrete. The GBU-28 was initially developed in 1991 for penetrating hardened Iraqi command centers located deep underground. This “bunker buster” was required for special targets during the Desert Storm conflict and was designed, fabricated and loaded in record time. The GBU-28 is a laser-guided conventional munition that uses a modified Army artillery tube as the bomb body. They are fitted with GBU-27 LGB kits, 14.5 inches in diameter and almost 19 feet long. The operator illuminates a target with a laser designator and then the munition guides to a spot of laser energy reflected from the target. Read more here.

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