Sail and method of making a sail and a membrane body

Sail (1) comprising at least one membrane body (I) including at least a fist panel (10) and a second panel (11) connected together in an adhesive manner by respective facing faces (12, 13) and a plurality of tie rods (16) arranged stably between the panels (10, 11) according to a set pattern;

• each said tie rod (16) having respective end portions (17, 18);
• said at least one membrane body further comprising insulation means (15) arranged between the panels and associated with each said tie rod (16) to leave said tie rod (16) longitudinally free between said panels (10, 11) said insulation means (15) being formed of the same material as said tie rod (16);
• said tie rod (16) being suitable for resisting a dual tensile membrane stress acting on each of said pair of panels (10, 11), and keeping said panels (10, 11) substantially free of tension during use;
• said second panel (11) covering said face (12) of said first panel (10) in such a way that said second panel (11) adheres integrally to said first panel (10);
• at least one sailcloth (14), delimited by respective side edges (4, 5) converging in a peak (3), and by a base edge (7).

Method of construction of sails including at least one membrane body (1) including at least a fist panel (10) and a second panel (11) connected together in an adhesive manner by respective facing faces (12, 13) and a plurality of tie rods (16) arranged stably between the panels (10, 11) according to a set pattern;

• each said tie rod (16) having respective end portions (17, 18);
• said membrane body further comprising insulation means (15) formed as sheaths and arranged between the panels and associated, respectively, with each said tie rod (16) to leave said tie rod (16) longitudinally free between said panels (10, 11);
• said tie rod (16) being suitable for resisting a dual tensile membrane stress acting on each of said pair of panels (10, 11), and keeping said panels (10, 11) substantially free of tension during use;
• said second panel (11) covering said face (I 2) of said first panel (10) in such a way that said second panel (11) adheres integrally to said first panel (10);
• at least one sailcloth (14), delimited by respective side edges (4, 5) converging in a peak (3), and by a base edge (7);
• the method comprising a phase of assigning a set shape to at least one first adhesive panel (10) (11) of laminated material and provided with a first adhesive face (12) (13);
• a phase of applying a plurality of rovings (25) of free fibers (24) to said first face (12) (13) according to a set pattern;
• a phase of protecting each said roving (25), by covering said first face (12) (13) of said first panel with a second panel in such a way that said second panel adheres integrally to said first panel and a phase of subdividing the free fibers (24) of said roving (25) into two distinct portions substantially coaxial to each other, to make a sheath (I5) with a first portion of said free fibers (24) and a tie rod (16) with a second portion of said free fibers (24);
• said sheath (15) being suitable for isolating said tie rod (16) from said first and second panels (10, 11), in such a way as to leave said tie rod (16) free to slide longitudinally in relation to said first panels and second panels (10, 11) and to resist normal stress to free said two panels (10, 11) from membrane stress.

Method of construction of a membrane body (1) including at least a first panel (10) and a second panel (11) connected together in an adhesive manner by respective facing faces (12, 13) and a plurality of tie rods (16) arranged stably between the panels (10, 11) according to a set pattern;

• each said tie rod (16) having respective end portions (17, 18);
• said membrane body further comprising insulation means (15) arranged between the panels and associated with each said tie rod (16) to leave said tie rod (16) longitudinally free between said panels (10, 11), said tie rod (16) being suitable for resisting a dual tensile membrane stress acting on each of said pair of panels (10, 11), and keeping said panels (10, 11) substantially free of tension during use;
• said second panel (11) covering said face (12) of said first panel (10) in such a way that said second panel (11) adheres integrally to said first panel (10), said method comprising a phase of assigning a shape to at least a first adhesive panel (10) (11) of laminated material provided with at least an adhesive face (12) (13);
• a phase of applying a plurality of flexible longitudinal bodies (15) onto said first adhesive face (12) (13) according to a set pattern;
• a phase of protecting said flexible longitudinal bodies (15) with a second panel (11) (10);
• a phase of increasing the adhesive property of said first face (12) (13) of said first panel (10) (11) to fix in position said flexible longitudinal bodies (15) and said first and second panels (10) (11);
• wherein each said flexible longitudinal membrane body (15) forms said insulation means (15) and one said tie rod (16) inside said insulation means (15), with said tie rod (16) comprising a plurality of fibers (24) of a set composition to leave said tie rod (16) free to slide longitudinally in relation to said insulation means (15) and to said first panel and second panel (10, 11), and able to resist normal stress to free said two panels (10, 11) from membrane stress;
• said phase of protecting said flexible longitudinal bodies (15) comprising covering said first face (12) (13) of said first panel (10) with said second panel (11) (10) in such a way that said second panel adheres integrally to said first panel, and wherein said phase of applying a plurality of flexible longitudinal bodies (15) onto said first adhesive face (12) (13) comprises applying a plurality of rovings (25) of free fibers (24) to said first face (12) (13) according to a set pattern and a phase of subdividing the free fibers (24) of said roving (25) into two distinct portions substantially coaxial to each other, to make a sheath (15) with a first portion of said free fibers (24) and a tie rod (16) with a second portion of said free fibers (24);
• said sheath (15) being suitable for isolating said tie rod (16) from said first and second panels (10, 11), in such a way as to leave said tie rod (16) free to slide longitudinally in relation to said first panels and second panels (10, 11) and to resist normal stress to free said two panels (10, II) from membrane stress.