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Little David was the nickname of an American 36-inch (914 mm) caliber mortar used for test-firing aerial bombs during World War II. With the same calibre as the British Mallet’s Mortar, constructed in May 1857, it is one of the largest-calibre guns ever built, having a larger calibre than both of Germany’s Schwerer Gustav and Dora which were 31.5-inch (800 mm) railway guns. The mortar was originally used as the launching mechanism for test-firing aerial bombs at Aberdeen Proving Ground (during the war, bombs became larger and larger, necessitating the construction of such a large-calibre gun). Little David was therefore not intended as a combat weapon. The mortar’s base was a large steel box that was placed below ground, with its top flush with the surrounding surface, allowing the mortar’s muzzle to be lowered horizontal for loading at ground level.
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