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:''For the class of ships sometimes known as the "Racehorse" class see 24 class sloop'' The Racecourse-class minesweepers were 32 ships delivered to the Royal Navy during the First World War. They were built to two related designs as paddlewheel coastal minesweeping sloops under the Emergency War Programme. The vessels were reasonable sea-boats, but lost speed badly in a seaway when the paddle boxes tended to become choked with water. The class is also widely referred to as the ''Ascot'' class and Improved ''Ascot'' class. ==Initial design== The original design was by the Ailsa Shipbuilding Company. The ships were completed between April and October 1916. Launch dates are shown below. * : January 1916, Ailsa S.B. Co—first of class, also last ship to be lost in World War I. * : January 1916, Ailsa S.B. Co * : April 1916, Ailsa S.B. Co * : June 1916, Ardrossan Co * : April 1916, Ayrshire D.Y. Co * : April 1916, Ayrshire D.Y. Co * : June 1916 Ayrshire D.Y. Co * : September 1916, Ayrshire D.Y. Co * : May 1916, G. Brown * : February 1916, Clyde S.B. Co. Originally fitted to carry seaplanes. * : April 1916, Dundee S.B. Co. * : June 1916, Dundee S.B. Co. * : March 1916, Dunlop, Bremner * : May 1916, Dunlop, Bremner * : Ferguson Bros. Lost in World War I. * : April 1916, Fleming & Ferguson * : Goole Co.—lost in World War I. * : March 1916, Hamilton. Originally fitted to carry seaplanes. * : July 1916, A. & J. Inglis * : McMillan—lost in World War I. * : June 1916, Murdoch & Murray * : Ayrshire D.Y. Co.—lost in World War I. * : July 1916, Dunlop, Bremner * : May 1916, McMillan On this type the foremast is stepped before the fore bridges and have derricks abeam of the second funnel. ==Improved Racecourse type== These paddle minesweepers were designed by the Admiralty, adapted from the Ailsa Company design for the first type. They were completed between January and June 1918. All were built under the Emergency War Programme. * : December 1917, Ailsa S.B. Co. * : February 1918, Ailsa S.B. Co. * : December 1917, Clyde S.B. Co. * : December 1917, Fleming & Ferguson * : March 1918, Fleming & Ferguson * : January 1918, Dunlop, Bremner * : Dunlop, Bremner. Sold as a ferry boat, 1919. * : March 1918, Murdoch & Murray. The foremast on this type is stepped through the chart house, there are two high ventilators abaft fore funnel and no derricks abeam of the second funnel. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Racecourse-class minesweeper」の詳細全文を読む スポンサード リンク
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