Sample from "Illustrated Sail & Rig Tuning" from Dedekam Design
 
To determine the correct twist
First  position the traveller on the track so that a  line of  extension  through  the sheet roughly divides  the genoa's luff into two parts  of equal length.  Then,  as shown below,  use  the sail's telltales  to find the best location of the traveller on the track.

The sail should twist to allow for change in apparent wind direction with height. When you have found the correct twist the genoa will luff simultaneously from foot to head as the boat is gently turned into the wind. At the same time all windward telltales will flutter.

The genoa has correct twist when:
- The sail is luffing from foot to top simultaneously when you are heading into the wind.

- All windward telltales flutter simultaneously when you head up.
 
 
 
 



 
 
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