Comparisons of eight different rigs suitable for the two-bowed proa hull design, i.e. can be reversed to sail the boat in either direction. Suitable for sailing canoes and similar designs.
Account of the early trials (as in tribulations) of a proa with a the crab-claw sail rig.
An on-line calculator for an unusual rig, a main mast that carries only staysails, paired with a boomed mizzen. Calcujlates sail areas, forces, moments, leeway, drag, and other variables. The author's trimaran with this rig is illustrated.
A long list of the inefficiencies of traditional mainsails, and an interesting argument for boomless and mastless sails. Sail plan diagrams.
A yacht designer thinks cruising boats over 35 feet should have a divided rig with unstayed masts. Here's his rationale.