How to Straighten a Mast

Pollak provides a precise method for determining mast straightness using a string stretched between the halyard sheave and gooseneck, allowing detection of mast curves as small as 1/2-turn of a spreader bolt.

This is a summary. The full article text is © the Thistle Class Association — read the original scan via the link above.

• mast
• straightness
• tuning
• measurement