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    • 8. 发明申请
    • A WING SAIL FOR A WING PROPELLED CRAFT
    • WO2022064195A1
    • 2022-03-31
    • PCT/GB2021/052466
    • 2021-09-22
    • ADVANCED WING SYSTEMS LIMITEDJOHNSTON, Gregory Owen
    • JOHNSTON, Gregory Owen
    • B63H8/40B63H9/061
    • The present invention relates to a wing sail (100) having a leech (102) and a luff (101) defining a first direction therebetween, the wing sail (100) comprising: first and second sail portions (110, 120), wherein the first sail portion (110) comprises a first sail portion luff (111) and a first sail portion leech (112), wherein the second sail portion (120) comprises a second sail portion luff (121) and a second sail portion leech (122), wherein the first sail portion luff (111) and the second sail portion luff (121) are spaced apart from each other in a direction transverse to the first direction to define a thickness of the wing sail (100); a first batten (130) in contact with the first sail portion (110), the first batten (130) extending from a first batten luff end (131) to a first batten leech end (132), wherein the first batten luff end (121) is proximal to the first sail portion luff (111) and the first batten leech end (132) is proximal to the first sail portion leech (112); and a first tension element (150) extending from a first luff connection (151) to a first leech connection (152), wherein the first luff connection (151) is proximal to the first batten luff end (131) and the first leech connection (152) is proximal to the first batten leech end (132), such that on tensioning of the first tension element (150), the first tension element (150) draws the first leech connection (152) directly towards the first luff connection (151) thereby bending the first batten leech end (132) towards the first batten luff end (131) to change the shape of the first sail portion (110).