| 摘要 |
A sail arrangement for a wind-propelled craft is of generally aerofoil section, comprising forward and aft generally longitudinal side-by-side mast elements (110, 118; 22, 26) capable of relative hinging movement with respect to each other. The rearward mast element (118; 26) has associated therewith first and second sail surfaces (120, 122; 28, 30) of flexible sail material which are connected together at a leach region and which extend forwardly to connect to spaced lateral regions of said aft mast element (118; 26) thereby to define a sail section. Each of said sail surfaces in use adopting an adjustable degree of curvature according to the different effective chord lengths imparted to the respective sail surfaces by movement of the aft mast element (118; 26) away from a neutral position relative to said sail surfaces. The forward mast element (110; 22) defines a leading edge region hingable with respect to said aft mast element. |
