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After World War II, the United States developed the 43,000-pound (20,000 kg) T12 demolition bomb, which was designed to create an earthquake effect. Given the availability of nuclear weapons with surface detonating laydown delivery , there was little or no development of conventional deep penetrating bombs until the 1991 Gulf War .
The Bomb, Medium Capacity, 22,000 lb (Grand Slam) was a 22,000 lb (10,000 kg) earthquake bomb used by RAF Bomber Command against German targets towards the end of the Second World War. The bomb was originally called Tallboy Large until the term Tallboy got into the press and the code name was replaced by "Grand Slam".
A three-foot (91 cm) nose probe detonated the bomb at the correct stand-off distance. One of the last of the World War II Tallboy designs was dropped during a Commando Vault mission to clear a landing zone for helicopters on a ridge during the 1969 Battle of Hamburger Hill in Vietnam. Dropping from 3,000 m (10,000 ft), the bomb hit exactly ...
The T-12 (also known as Cloudmaker) earthquake bomb was developed by the United States from 1944 to 1948 and deployed until the withdrawal of the Convair B-36 Peacemaker bomber aircraft in 1958. It was one of a small class of bombs designed to attack targets invulnerable to conventional "soft" bombs, such as bunkers and viaducts.
During World War II, Royal Air Force Bomber Command used the Grand Slam, officially known as the "Bomb, Medium Capacity, 22,000 lb" 42 times. At 22,000 lb (10,000 kg) total weight, these earthquake bombs were larger and heavier than the MOAB. However, half their weight was due to the cast high tensile steel casing necessary for penetrating the ...
In World War II, the British designer Barnes Wallis, already famous for inventing the bouncing bomb, designed two bombs that would become the conceptual predecessors of modern bunker busters: the five tonne Tallboy and the ten tonne Grand Slam. These were "Earthquake" bombs—a concept he had first proposed in 1939. [3]
On May 5, 1945, a pregnant Sunday school teacher and five children from a small Oregon town called Bly were killed by a Japanese-built bomb that had floated across the ocean on a balloon.
It is one of the largest conventional weapons ever used, outweighed only by a few earthquake bombs, thermobaric bombs, and demolition (bunker buster) bombs. Some of these include the Grand Slam and T12 earthquake bombs of late World War II, and more currently, the Russian Air Force FOAB and USAF GBU-43/B Massive Ordnance Air Blast bomb , and ...