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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Smith-Putnam wind turbine ： ウィキペディア英語版 Smith-Putnam wind turbine In 1941 the Smith-Putnam wind turbine, the world's first megawatt-size wind turbine, was connected to the local electrical distribution system on Grandpa's Knob in Castleton, Vermont, USA. It was designed by Palmer Cosslett Putnam and manufactured by the S. Morgan Smith Company. The 1.25 MW turbine operated for 1100 hours before a blade failed at a known weak point, which had not been reinforced due to war-time material shortages. It would be the largest wind turbine ever built until 1979.〔''A Pioneer is Vindicated'' in ''Kiplinger's Personal Finance'' Jan 1981, page 24, available at Google Books〕 ==Description== The turbine had two blades, 175 feet (53 m) in diameter, on the down-wind side of a 120-foot (36 m) steel lattice tower. Each blade was approximately 8 feet (2.4 m) wide and 66 feet (20 m) long, and weighed eight tons. The blades were built on steel spars and covered with a stainless steel skin. The blade spars were hinged at their root attachment to the hub, allowing them to assume a slight cone shape. The generator was a 1250 kW 600 RPM synchronous generator made by General Electric, producing 2,400 V at 60 cycles. The generator and rotor hub were mounted on a pintle beam, which allowed the rotor to capture wind from varying directions. The pitch of the blades was controlled by hydraulic cylinders to maintain constant speed. 〔Daniel Behrman, ''Solar energy: the awakening science'' Taylor & Francis, 1979 ISBN 0-7100-8939-2 pages 227–230〕 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「Smith-Putnam wind turbine」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.