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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".
The final T-12 weighed 43,600 lb (19,800 kg). This was twice the size of the United States' previous largest bomb, the 22,000 lb (10,000 kg) M110 (T-14), the American-built version of the British Grand Slam. The T-12 was not a simple scale up of the M110, but incorporated modifications based on testing and calculations.
ROF Risley, (Filling Factory No.6) was a large World War II Royal Ordnance Factory filling munitions, including the Grand Slam bomb, in the UK. It is located roughly halfway between Liverpool and Manchester .
The site was used to develop a more effective air-raid shelter, built over five and a half months at a cost of £250,000.Once complete, the site became the first to be subjected to the devastating effect of Barnes Wallis's Grand Slam bomb, which was test-dropped on the site.
The FAB-9000 (20,000 lb or 9,000 kg) weapon was roughly comparable to the wartime Grand Slam bomb. It was used by Soviet aircraft designers as a substitute for early nuclear weapons when determining the size and clearances of bomb bays.
Grand Slam (bomb), a 10-tonne British "earthquake bomb" of World War II; Exercise Grand Slam, a 1952 NATO naval exercise in the Mediterranean Sea; Grand Slam Installation, a modification of the B-36 bomber to add nuclear weapons delivery capability; Operation Grand Slam, a Pakistan Army offensive plan during the Indo-Pakistani War of 1965
The Bielefeld viaduct was only closed for brief periods by 54 raids dropping 3,500 tons; but in its first use on 14 March 1945 the "Grand Slam" destroyed whole sections of the viaduct. 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.
[4] [3] The new bomber also possessed an enlarged fuselage that accommodated increased fuel and bomb loads and allowed up to 11 tons of various armaments and equipment fittings including the Grand Slam bomb to be carried. It had a higher operational ceiling and longer range than its Lancaster predecessor, being capable of a maximum altitude of ...