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The most famous Lancaster mission was the destruction of two of three Ruhr dams on the night of 16 May, 1943. It involved skipping special bombs across the water like stones to avoid torpedo netting used to protect the dams. The bombs had to be rotating at a backspin speed of 500 rpm and dropped on the water from 60 feet while going precisely 220 mph or 180 mph depending on the dam. There was the added factor of determining the exact distance from the dam to release the bomb. The ingenuity used to perform these tasks successfully was one of the most extraordinary accomplishments of the war.
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