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The crab claw sail is a fore-and-aft triangular sail with spars along upper and lower edges. The crab claw sail was first developed by the Austronesian peoples by at least 2000 BCE. It is used in many traditional Austronesian cultures in Island Southeast Asia, Micronesia, Island Melanesia, Polynesia, and Madagascar.
The crab claw configuration used on these vessels is a low-stress rig, which can be built with simple tools and low-tech materials, but it is extremely fast. On a beam reach, it may be the fastest simple rig. Another evolution of the basic crab claw sail is the conversion of the upper spar into a fixed mast.
The mast usually hinges, adjusting the rake or angle of the mast. The crab claw configuration used on these vessels is a low-stress rig, which can be built with simple tools and low-tech materials, but it is extremely fast. On a beam reach, it may be the fastest simple rig. Crab claw examples
A mast-aft rig is a sailboat sail-plan that uses a single mast set in the aft half of the hull. The mast supports fore-sails that may consist of a single jib, multiple staysails, or a crab claw sail. The mainsail is either small or completely absent. Mast-aft rigs are uncommon, but are found on a few custom, and production sailboats. [1]
Fore-and-aft rigged sails include staysails, Bermuda rigged sails, gaff rigged sails, gaff sails, gunter rig, lateen sails, lug sails, tanja sails, the spanker sail on a square rig, and crab claw sails. Fore-and-aft rigs include: Rigs with one mast: the proa, the catboat, the sloop, the cutter; Rigs with two masts: the ketch, the yawl; Rigs ...
Despite the similarity of its appearance to western square rigs, the tanja is a fore-and-aft rig functioning similar to a lugsail. The sail was suspended from the upper spar ("yard"), while the lower spar functioned like a boom. [11] When set fore-and-aft, the spars extend forward of the mast by about a third.
V-shaped square rigs with two spars that come together at the hull were the ancestral sailing rig of the Austronesian peoples before they developed the fore-and-aft crab claw, tanja and junk rigs. [11] The date of introduction of these later Austronesian sails is disputed. [12]
Bigiw with tanja, crab claw, and spritsails from the Island Garden City of Samal, Davao del Norte. Bigiw is a small double-outrigger sailboat native to the islands of Mindanao (particularly in the Island Garden City of Samal), Visayas, and Palawan in the Philippines. It is used for personal transport or small-scale fishing and can hold one to ...
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