翻訳と辞書 Words near each other ・ Twin Rivers, East Riding of Yorkshire ・ Twin Rivers, New Jersey ・ Twin Rocks ・ Twin Rocks, California ・ Twin Rocks, Oregon ・ Twin Sails Bridge ・ Twin Sector ・ Twin Series Vol. 3 – Konchuu Monster/Super Chinese Labyrinth ・ Twin Shadow ・ Twin Shaft disaster ・ Twin Islands (British Columbia) ・ Twin Islands (Nunavut) ・ Twin Islands Wildlife Sanctuary ・ Twin Islets ・ Twin Jet ・ Twin keel ・ Twin Kingdom Valley ・ Twin Lake (Alberta) ・ Twin Lake Township ・ Twin Lake Township, Benson County, North Dakota ・ Twin Lake Township, Hancock County, Iowa ・ Twin Lake, Michigan ・ Twin Lakes ・ Twin Lakes (Alaska) ・ Twin Lakes (Connecticut) ・ Twin Lakes (Fort Lauderdale) ・ Twin Lakes (Glacier National Park) ・ Twin Lakes (Idaho) ・ Twin Lakes (Lake Wales, Florida) ・ Twin Lakes (Madison County, Montana) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Twin keel ： ウィキペディア英語版 Twin keel Twin keels or bilge keels are two keels that emerge at an angle from the hull of a sailboat (and some ships), at or near the bilge. The angle allows the boat to have a shallower draft while still allowing for minimum leeway while sailing. The placement of the twin keels also allows the boat to stand upright when out of the water without additional support, as opposed to a single-keeled boat that would fall over if water levels dropped. Twin-keeled boats are typically used in coastal areas that experience extreme changes in tide. When the tide is low, the boat will sit on her keels and remain stable and upright. This configuration is especially useful for sailors in Britain and might in the future be applied in the parts of the Atlantic North America that are extremely tidal such as the Fundy waters that are shared by Maine, New Brunswick, and Nova Scotia. Twin keels are meant to make sailing safer and easier in shallow or extremely tidal waters while preserving the stability and performance of deep-keel vessels. Yet, twin keels are often shown to provide better theoretical performance on paper, and, in realty, are only slightly slower performing when compared with single keels on identical vessels. They are also said to be safer in downwind conditions as they are more resistant to rolling, and hence should not broach as easily.〔(Roll Attenuation )〕 (Broaching can occur when a boat "surfs" down a wave and its stern gets lifted and pushed by the wave, causing the vessel to turn sharply, and is then rolled over by the wave.) ==Twin keel vessels== 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「Twin keel」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.