Thistlebase
Cunningham Holes
Technical explanation and diagram of the Cunningham Hole feature for Thistle sails, showing both released and tightened positions. Discusses maintenance and mechanics of this sail adjustment system.
View original on Google Drive · page 6
The scanned issue opens in Google Drive; turn to page 6.
This is a summary. The full article text is © the Thistle Class Association — read the original scan via the link above.