| 摘要 |
PROBLEM TO BE SOLVED: To provide a sailing ship equipped with a variable-height hard sail. SOLUTION: The sailing ship is equipped with a hard sail aggregate comprising a plurality of multi-staged hard sails which are each shaped like a wing-sectional cylindrical body and sequentially accommodated by the hard sail at the stage immediately underneath in a telescopic manner, a first drive means to drive each hard sail above the bottom stage to advance toward or retreat from the hard sail at the stage immediately underneath, a vertically extending post to support the hard sail at the bottom stage, and a second drive means to drive the post to rotate around its vertical axis, capable of furling and unfurling the hard sail aggregate by variable control of the amount of vertical superimposition of hard sails at two vertically adjacent stages. COPYRIGHT: (C)2009,JPO&INPIT
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