Froude, William (frōd) [key], 1810–79, English engineer and
naval architect, brother of J. Anthony Froude; educated at
Oxford. In 1837 he worked on the Bristol and Exeter railroad,
constructing the line from the Whitehall tunnel to Exeter. He
studied the motion of a ship among waves, demonstrating that the
rolling of a ship could be reduced by a deep bilge keel. This
fact and his conclusions on the relationship between
construction design, efficiency, and power in screwships were
extensively used by the Royal Navy. He also constructed a
dynamometer for measuring the power of large marine engines. The
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