Recent Blogs
Square or Lug Sail Mechanism: How It Works, Parts, Diagram and Sailing Uses Explained
How a square or lug sail works, with rigging geometry, drive force formulas, and a worked example for traditional boatbuilders and sail trainers.
Split Lug or Square Sail: Mechanism, Sling Point Diagram, and Rig Parts Explained
Split Lug and Square Sail rigs explained — geometry, sail forces, and trim numbers for small craft, training boats, and traditional workboat restorations.
Brigantine Sailing Rig Explained: How the Two-Masted Square and Fore-and-Aft Mechanism Works
Explore a brigantine’s square foremast, gaff mainsail and headsails, then compare sail area and displacement using the dimensionless SA/D ratio.