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The Disappearing Propeller Boat

机译:消失的螺旋桨船

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The Disappearing Propeller Motor Boat,commonly known as the "Dispro," was invented and patented in 1915 by skiff and launch builder WJ.'Billy' Johnston of Port Carling,Ontario,Canada.The basic hull is a 16'double-ended lapstrake rowing skiff; it is driven by a small 2-hp Waterman Copper Jacket motor coupled to the patented disappearing-propeller 'Device.' The Device contains a universal joint on the propeller shaft and a hinged skeg that also functions as a propeller guard.The operator can raise the propeller into the metal housing so it's flush to the keel,to facilitate beaching and to control the boat's speed.If the skeg were impacted underway,it would swing upward in the housing and protect the propeller.
机译:“消失的螺旋桨摩托艇”(俗称“ Dispro”)于1915年由船长兼发射建造者WJ.Canada安大略省卡灵港的“比利”约翰斯顿发明并申请了专利。基本船体是16英尺长的双膝划艇艇它由一个2 hp的小型Waterman Copper Jacket电动机驱动,该电动机与获得专利的消失式螺旋桨“设备”相连。该设备在螺旋桨轴上装有一个万向节,还有一个铰链的尾钉,也可以用作螺旋桨护罩。操作员可以将螺旋桨提升到金属外壳中,使其与龙骨齐平,以利于搁浅并控制船速。 sk鳍正在进行中,它将在外壳中向上摆动并保护螺旋桨。

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