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The boomerang propeller
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July 4th, 1853

Another trial of Sir Thomas Mitchell's boomerang propeller took place this morning on-board her Majesty's ship Conflict, under the command of Captain W. H. Henderson, O.B., of her Majesty's ship Blenheim, attended by Mr. Murray, chief engineer and inspector of machinery in the dockyard. Phe Conflict left the harbour at 9 a.m. for the measured mile in Stoke's Bay, when the average result of six runs was 9.378 knots - an improvement of about two-thirds of a knot on the speed attainable with the Conflict's own propeller. 
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