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''Blue Bird K3'' is a hydroplane powerboat commissioned in 1937 by Sir Malcolm Campbell, to rival the Americans' efforts in the fight for the world water speed record. She set three world water speed records, first on Lake Maggiore in September 1937, then later twice raising her own record. The name "K3" was derived from its Lloyd's unlimited rating, and was carried in a prominent circular badge on the forward hull. == Construction == After Campbell's achievement of the 300 mph land speed record with Blue Bird in 1935 he retired from the land speed record. Shortly afterwards he switched his attentions to the water speed record, at that time dominated by the American Gar Wood.〔Harris, Skimming the Surface〕 Fred Cooper of Saunders Roe was commissioned to design a small hydroplane powered by the same Rolls Royce R engine used in Blue Bird, and also in pairs in Segrave and Kaye Don's Miss England boats. Of the three individual R engines used by K3, one had previously run in Blue Bird and one in Miss England. Unlike Gar Wood's multi-engined monsters, Blue Bird was designed for a single engine, and the smallest possible craft to carry it. She was 23 feet long, compared to 38 feet for Miss America X. Her estimated top speed on paper was to be 130 mph.〔 It was usual at this time for English hydroplanes to have their engines mounted as far astern as possible (Gar Wood disagreed, and had pointed this out to Segrave). K3 took this a step further and had a narrow central nacelle that overhung the transom of the stern. This rearward weight distribution encouraged planing, but could lead to some peculiar attitudes when setting off at slow speeds, as the whole boat appeared to be sinking by the stern. 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「Blue Bird K3」の詳細全文を読む スポンサード リンク
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