To help visualize the aerodynamic shape of the sail, UK Sailmakers applies contrasting, horizontal stripes to the sail at several different heights. Draft stripes can also be used in shape analysis software, like UK Sailmakers’ AccuMeasure that you can download for free.
Click here to download AccuMeasure.
A screen capture of UK's AccuMeasure program which is used to analyze a sail's flying shape. Click here to download the program for free.