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Head – The head is the upper edge of the sail, and is attached at the throat and peak to a gaff, yard, or sprit. [7] For a triangular sail the head refers to the topmost corner. Leech – The aft (back) edge of a fore-and-aft sail is called the leech (also spelled leach). [8] The leech is either side edge of a symmetrical sail—triangular or ...
Edges – The top of all sails is called the head, the leading edge is called the luff on fore-and-aft sails [37] and on windward leech symmetrical sails, the trailing edge is the leech, and the bottom edge is the foot. The head is attached at the throat and peak to a gaff, yard, or sprit. [38] For a triangular sail the head refers to the ...
Boat building is the design and construction of boats (instead of the larger ships) — and their on-board systems. This includes at minimum the construction of a hull , with any necessary propulsion, mechanical, navigation, safety and other service systems as the craft requires.
A staysail (pronounced stays'l) is a fore-and-aft sail whose leading edge is hanked to a stay. A headsail is any sail forward of the foremost mast on a sailing boat. It is usually a fore-and-aft sail, but on older sailing ships would include a square-sail on a bowsprit. [11]
In modern boats, it is the top edge of the hull where there is usually some form of stiffening, often in the form of traditional wooden boat construction members called the "inwale" and "outwale". On a canoe, the gunwale is typically the widened edge at the top of its hull, reinforced with wood, plastic or aluminum, to carry the thwarts.
The construction of boats is a similar activity called boat building. The dismantling of ships is called ship breaking. The earliest evidence of maritime transport by modern humans is the settlement of Australia between 50,000 and 60,000 years ago. This almost certainly involved rafts, possibly equipped with some sort of sail.
[6] [9] On a given sail, the net aerodynamic force on the sail is located approximately at the maximum draught intersecting the camber of the sail and passing through a plane intersecting the centre of effort, normal to the leading edge (luff), roughly perpendicular to the chord of the sail (a straight line between the leading edge (luff) and ...
Sail detail at the tack (lower corner of the leading edge) of a mainsail, showing bolt ropes in the luff and foot.Bolt ropes may extend to other parts of a sail, as well.. A bolt rope [1] (Variants: "bolt-rope" and "boltrope", French: ralingue, Spanish: relinga, [2] Old Norse: *rár-línk, comprising rár genitive of rá "rope" and línk "edge of a sail "), is the rope that is sewn at the ...