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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 .
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]
The bottom corner of the crab claw sail is moved to the other end, which becomes the bow as the boat sets off back the way it came. 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 ...
A tepukei, tepuke or TePuke is a Polynesian boat type, characterized by its elaborate decking, its submerged hulls and symmetrical "crab claw" sail slender foil or radically extended tips claw sail (Te Laa). Tepukei boats are produced primarily by the Polynesian-speaking inhabitants of Taumako (Duff Islands), and have been occasionally borrowed ...
Crab claw sails spread from Maritime Southeast Asia to Micronesia, Island Melanesia, Polynesia, and Madagascar via the Austronesian migrations. [3] Austronesians in Southeast Asia also later developed other types of fore-and-aft sails, such as the tanja sail (also known as the canted square sail, canted rectangular sail, or the balance lug sail).
Instead it has a "crab claw" sail, [1] and is further controlled by the skillful use of fore and aft trim—moving the boat's balance point, that is the center of resistance relative to the center of effort—to control her heading. [1] [3] This is essentially like a wind surfer. See Sail twist.
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Austronesians used distinctive sailing technologies, namely the catamaran, the outrigger ship, tanja sail and the crab claw sail.This allowed them to colonize a large part of the Indo-Pacific region during the Austronesian expansion starting at around 3000 to 1500 BC, and ending with the colonization of Easter Island and New Zealand in the 10th to 13th centuries AD.