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Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal spars which are perpendicular, or square, to the keel of the vessel and to the masts. These spars are called yards and their tips, outside the lifts, are called the yardarms. [1] A ship mainly rigged so is called a square ...
Square-rigged vessels are much less common, and are usually large ships. Nevertheless, they too have sheets on the movable corners of their square sails. Unlike fore-and-aft sheets, though, square-rig sheets do not control the angle of the sails (which is performed using braces); instead, they are used to haul the corners of the sails from their stowed positions down towards the tip of the ...
The lever is let off for down wind sailing, so the main sail becomes full. Alternatively the outhaul tail can be attached to a block and tackle system so that it can be adjusted to many positions. [1] Jib Fairleads, which determine the sheeting angle, depth of the sail, height of the clew, leach tension and other sail trim variables. [5]
Sails are classified as "triangular sails", "quadrilateral fore-and-aft sails" (gaff-rigged, etc.), and "square sails". [38] The top of a triangular sail, the head , is raised by a halyard , The forward lower corner of the sail, the tack , is shackled to a fixed point on the boat in a manner to allow pivoting about that point—either on a mast ...
A fore-and-aft topsail may be carried above the upper or only spanker, and is called the gaff sail. To stop a full-rigged ship, except when running directly down wind, the sails of the foremast are oriented in the direction perpendicular to those of the mainmast. Thus, the masts cancel out of their push on the ship. [5]
Clewlines and buntlines are lines used to handle the sails of a square rigged ship. The leechlines are clearly visible running inwards and upwards from the edges of the sail. The buntlines up the front of the sail can be seen too, but their run to the blocks on the shrouds is obscured because the sail is set on a lifting yard.
In points of sail from a broad reach to down wind, sails act substantially like a parachute, with drag predominantly propelling the craft. For craft with little forward resistance, such as ice boats and land yachts , this transition occurs further off the wind than for sailboats and sailing ships .
A replica of the Batavia flying a spritsail (lower right) and a sprit-topsail. On large sailing ships a spritsail is a square-rigged sail carried on a yard below the bowsprit. [1] [2] One of the earliest depictions of a spritsail is carved on Borobudur ship carving in Borobudur temple, Indonesia.