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RNLB William and Kate Johnstone (ON 682)
RNLB ''William and Kate Johnston'' (ON 682) was a lifeboat〔Ships For All: By Bowen, Frank C: Published by Ward, Lock & Co., Ltd, London and Melbourne: Second Edition〕 stationed at New Brighton in the English county of Merseyside from the summer of 1923〔Heroes All!, The story of the RNLI, By Beilby, Alec: Published By Patrick Stephens Ltd (1992): ISBN 1-85260-419-0〕 until 1950. The lifeboat was designed as a prototype by James R. Barnett〔Rescue at Sea: By Evans, Clayton: Published by Conway (2003): ISBN 0-85177-934-4〕 who was a consulting naval architect to the Royal National Lifeboat Institution. She was the first ''Barnett''-class lifeboat and at the time of her launch, she was the largest lifeboat in the world.〔
==Design and construction==
This new design of motor lifeboat was a radical〔 departure from previous RNLI rescue boats. It was nearly long with a beam of close to . The ''William and Kate Johnston'' was pushed through the water with twin propellers〔 which were housed in tunnels. To drive these propellers there were two new D.E. six-cylinder submersible petrol engines of 80 horsepower.〔 Each engine was housed in its own chamber, with entirely separate fuel and cooling systems.〔 Each of these was watertight and was capable of running if the engine room became flooded and the engine was entirely submerged. The engines air intakes were set well above the waterline even when the boat was waterlogged. The ''Barnett''-class could cruise at 〔 and had an operating range of .〔 The class was also the first RNLI that rely solely on it engines for its motive power although the Barnett was equipped with a small staysail and trysail for stability purposes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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