Recent Blogs
Leg-of-mutton Sail
How a leg-of-mutton sail works — geometry, driving force, rigging tradeoffs, and a worked example for sizing a small-craft mainsail by wind speed.
Lateen-rigged Felucca
Lateen-rigged felucca explained — how the triangular sail and slanted yard drive Nile cargo boats upwind, with rig geometry, drive force formulas and a worked...
Square or Lug Sail
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
Split Lug and Square Sail rigs explained — geometry, sail forces, and trim numbers for small craft, training boats, and traditional workboat restorations.
Lateen Rig
How a Lateen Rig works, the geometry behind its upwind ability, and where you still see it today — from Nile feluccas to modern sailing...
Full-rigged Ship
How a full-rigged ship works — square sails on three or more masts, sail plan geometry, driving force calculations, and named examples from naval and...
Full Schooner Rig
Learn how a full schooner rig works, why fore-and-aft sails outperform square rig upwind, and how crews on vessels like Bluenose handle 4+ masts efficiently.