Editing Sail components (section)

===Stitching and bonding===
Conventional sail panels are sewn together. Sails are tensile structures, so the role of a seam is to transmit a tensile load from panel to panel. For a sewn, textile sail this is done through thread and is limited by the strength of the thread and the strength of the hole in the textile through which it passes. Sail seams are often overlapped between panels and sewn with zig-zag stitches that create many connections per unit of seam length.<ref name = Hancock/> Measures for seam structural attributes—shown with a typical value for a sewn seam—include:<ref name = JonesStylios>
{{Citation
 | last1 = Jones
 | first1 = I.
 | last2 = Stylios
 | first2 = G.K.
 | title = Joining Textiles: Principles and Applications
 | publisher = Elsevier
 | series = Woodhead Publishing Series in Textiles
 | year = 2013
 | pages = 624
 | url = https://books.google.com/books?id=mw9IAgAAQBAJ&pg=PA457
 | access-date = 2017-01-12
 | isbn = 9780857093967 }}</ref>
*''Breaking force'' ([[newtons]]) – {{convert|630|N|lbf}}
*''Elongation'' (percent) – 22%
*''Strength'' (newtons/millimetre) – {{convert|14|N/mm|lbf/mm}}
*''Modulus of elasticity'' (newtons/millimetre) – {{convert|1.2|N/mm|lbf/mm}}
Whereas textiles are typically sewn together, other sail materials may be [[Ultrasonic welding|ultrasonically welded]]—a technique whereby high-frequency [[Ultrasound|ultrasonic]] [[Acoustics|acoustic]] [[vibration]]s are locally applied to workpieces being held together under pressure to create a solid-state [[Welding|weld]].  It is commonly used for [[plastics]], and especially for joining dissimilar [[Materials science|materials]].<ref name = JonesStylios/>