| 摘要 |
The invention relates to a device making it possible to use the top-up force of the wind on all mechanically propelled ships for the purpose of economising on fuel consumption of the power plant. It consists of three or more masts 1 supporting, alternately one of them an upper orientable main yard 2, the other an orientable lower main yard or boom 3. To these main yards are fixed triangular sails 4 which can be reduced by rolling (furling). <IMAGE>
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