Mallet's Mortar was a 36 inch mortar designed by Robert Mallet for use in the Crimean War. Only two were built and only one was tested and it is on display in Woolwich. Neither was used in the Crimean War. Robert Mallet made his design public in 1854 and the first was built in 1857. A total of 19 shells were fired with each weighing around 2500 pounds. The greatest distance achieved was 2759 yards with a flight time of 23 seconds.
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