Editing Angle of attack (section)

==Sailing==
In [[sailing]], the physical principles involved are the same as for aircraft—a sail is an airfoil.<ref name="MIT - How Sails Work">{{cite web|last=Evans|first=Robin C.|title=HOW A SAIL BOAT SAILS INTO THE WIND|url=http://web.mit.edu/2.972/www/reports/sail_boat/sail_boat.html|work=Reports on How Things Work|publisher=Massachusetts Institute of Technology|access-date=14 January 2012}}</ref> A sail's '''angle of attack''' is the angle between the sail's chord line and the direction of the relative wind.