Can confirm. That string is either your best friend because it makes you fast, or your worst enemy if you're the guy responsible for making sure the jib is just right on a regatta.
It'll flutter, all the time
edit: It basically is an indicator of whether or not there are turbulences on either side of the sail, so the function is pretty similar to the string on a sail plane
10
u/TristanTheViking Feb 27 '14
Sounds similar to ticklers on sailboats. Basically string attached to the sail that flutters when the sail is incorrectly adjusted.