A topsail ("tops'l") is a sail set above another sail; on square-rigged vessels further sails may be set above topsails.
A topsail ("tops'l") is a sail set above another sail; on square-rigged vessels further sails may be set above topsails.
On a square rigged vessel, a topsail is a typically trapezoidal shaped sail rigged above the course sail and below the topgallant sail where carried ,on any mast (i.e., a fully rigged ship would have a foremast topsail, a mainmast topsail, and a mizzen topsail). A full rigged ship will have either single or double (i.e, "split" upper and lower) topsails on all masts, the single or lower topsail being the second sail above the deck and the upper topsail where so rigged being the third.
Although described as a "square" sail, a topsail on a full rigged ship refers not to the sail's shape but to it and its yard being rigged square (i.e., at a right angle) to the vessel's keel rather than in line with it (in which case it would be called a fore-and-aft rig or a fore-and-aft rigged sail) ; a square rigged topsail is nearly always trapezoidal in shape, with the lengths of the upper yards being progressively smaller the higher they are on the mast. The bottom edge of the topsail, like that of other square rigged sails, is slightly concave which allows the rigging to connect to the mast. The principal exception to this trapezoidal rule is the raffee sail, which is a square rigged topsail that is triangular (such as is seen on the foremast of the ship Denis Sullivan , a topsail schooner). A topsail which is fore-and-aft rigged is usually also triangular, but has its longest edge oriented vertically rather than horizontally as seen in the raffee sail.
Although the early Romans used a sort of fore-and-aft rigged topsail on some vessels, this sail came into prominent use in Europe some time in the 15th century. Initially small and carried only on main and fore masts, they gradually increased in size and importance until by the middle of the 17th century and were the principal and largest sails of the ship, the first sails to be set and the last to be taken in. It was quite common for a ship to sail with topsails and jibs alone; the position of the topsails well above the sea ensured that they received a steady breeze even if the seas were rough.
Because of their ability to drive a ship in lighter winds than the course sail below or any sail above, the topsail quickly became enormous and was soon difficult and dangerous to handle in strong winds. Sometime in the 1680s, reef-bands were introduced to tie up part of the sail, with topsails eventually getting four of these. In the mid 19th century topsails of merchant vessels were split into separate upper and lower topsails that could be managed independently and far more easily by significantly smaller crews (see Cutty Sark for a prominent example). Such sails were still often referred to as a single "topsail", however.
Competing versions of this double topsail were invented by Robert Bennet Forbes and Captain Frederic Howes. Although Forbes strove to defend his rig, the Howe rig dominated. [1] [2] In the Forbes rig, both topsail yards are fixed vertically. [3] In the Howe rig, the upper topsail yard slides on the topmast so it can be lowered in a few seconds to close reef the upper topsail. Howe had the foot of the upper topsail closely attached to the lower topsail yard. In 1865 the British clipper Ariel introduced a gap there. [4] Forbes first tried his rig in the topsail schooner Midas in 1844.The clipper Climax built in 1853 under the supervision of Howes was the first ship with Howe rig. [5]
Gaff topsails, like gaff rigs in general, may still be seen at tall ships gatherings. The gaff rig has been largely superseded by the Bermuda rig, which has no topsails. On a gaff-rigged sailing boat, topsails may take a few different forms:
On rigs having multiple jibs or staysails of which at least one is set high, such as many late 19th and 20th Century racing cutters, the uppermost of these, set flying or on a topmast stay, is often called the jib topsail.
Topsails (Greek: sipharos; Latin: siparum) in the form of an isosceles triangle set above the square mainsail were used in Roman navigation. [11]
A sloop is a sailboat with a single mast typically having only one headsail in front of the mast and one mainsail aft of (behind) the mast. Such an arrangement is called a fore-and-aft rig, and can be rigged as a Bermuda rig with triangular sails fore and aft, or as a gaff-rig with triangular foresail(s) and a gaff rigged mainsail. Sailboats can be classified according to type of rig, and so a sailboat may be a sloop, catboat, cutter, ketch, yawl, or schooner. A sloop usually has only one headsail, although an exception is the Friendship sloop, which is usually gaff-rigged with a bowsprit and multiple headsails. If the vessel has two or more headsails, the term cutter may be used, especially if the mast is stepped further towards the back of the boat.
A schooner is a type of sailing vessel defined by its rig: fore-and-aft rigged on all of two or more masts and, in the case of a two-masted schooner, the foremast generally being shorter than the mainmast. A common variant, the topsail schooner also has a square topsail on the foremast, to which may be added a topgallant. Differing definitions leave uncertain whether the addition of a fore course would make such a vessel a brigantine. Many schooners are gaff-rigged, but other examples include Bermuda rig and the staysail schooner.
A sail plan is a description of the specific ways that a sailing craft is rigged. Also, the term "sail plan" is a graphic depiction of the arrangement of the sails for a given sailing craft.
A brigantine is a two-masted sailing vessel with a fully square-rigged foremast and at least two sails on the main mast: a square topsail and a gaff sail mainsail. The main mast is the second and taller of the two masts.
A jib is a triangular sail that sets ahead of the foremast of a sailing vessel. Its tack is fixed to the bowsprit, to the bows, or to the deck between the bowsprit and the foremost mast. Jibs and spinnakers are the two main types of headsails on a modern boat.
A tall ship is a large, traditionally-rigged sailing vessel. Popular modern tall ship rigs include topsail schooners, brigantines, brigs and barques. "Tall ship" can also be defined more specifically by an organization, such as for a race or festival.
A mainsail is a sail rigged on the main mast of a sailing vessel.
A cutter is a type of watercraft. The term has several meanings. It can apply to the rig of a sailing vessel, to a governmental enforcement agency vessel, to a type of ship's boat which can be used under sail or oars, or, historically, to a type of fast-sailing vessel introduced in the 18th century, some of which were used as small warships.
Gaff rig is a sailing rig in which the sail is four-cornered, fore-and-aft rigged, controlled at its peak and, usually, its entire head by a spar (pole) called the gaff. Because of the size and shape of the sail, a gaff rig will have running backstays rather than permanent backstays.
A yard is a spar on a mast from which sails are set. It may be constructed of timber or steel or from more modern materials such as aluminium or carbon fibre. Although some types of fore and aft rigs have yards, the term is usually used to describe the horizontal spars used on square rigged sails. In addition, for some decades after square sails were generally dispensed with, some yards were retained for deploying wireless (radio) aerials and signal flags.
A Bermuda rig, Bermudian rig, or Marconi rig is a configuration of mast and rigging for a type of sailboat and is the typical configuration for most modern sailboats. This configuration was developed in Bermuda in the 1600s; the term Marconi, a reference to the inventor of the radio, Guglielmo Marconi, became associated with this configuration in the early 1900s because the wires that stabilize the mast of a Bermuda rig reminded observers of the wires on early radio masts.
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. A ship mainly rigged so is called a square-rigger.
Sail components include the features that define a sail's shape and function, plus its constituent parts from which it is manufactured. A sail may be classified in a variety of ways, including by its orientation to the vessel and its shape,. Sails are typically constructed out of flexible material that is shaped by various means, while in use, to offer an appropriate airfoil, according to the strength and apparent direction of the wind. A variety of features and fittings allow the sail to be attached to lines and spars.
A full-rigged ship or fully rigged ship is a sailing vessel's sail plan with three or more masts, all of them square-rigged. A full-rigged ship is said to have a ship rig or be ship-rigged. Such vessels also have each mast stepped in three segments: lower mast, top mast, and topgallant mast. Other large, multi-masted sailing vessels may be regarded as ships while lacking one of the elements of a full-rigged ship, e.g. having one or more masts support only a fore-and-aft sail or having a mast that only has two segments.
The masts of traditional sailing ships were not single spars, but were constructed of separate sections or masts, each with its own rigging. The topmast is one of these.
The spritsail is a four-sided, fore-and-aft sail that is supported at its highest points by the mast and a diagonally running spar known as the sprit. The foot of the sail can be stretched by a boom or held loose-footed just by its sheets. A spritsail has four corners: the throat, peak, clew, and tack. The Spritsail can also be used to describe a rig that uses a spritsail.
A jackass-barque, sometimes spelled jackass bark, is a sailing ship with three masts, of which the foremast is square-rigged and the main is partially square-rigged and partially fore-and-aft rigged (course). The mizzen mast is fore-and-aft rigged.
A ringtail a sail which is set abaft (behind) a fore-and-aft sail to increase the total sail area of a sailing vessel in light winds. It may be three or four-sided.
Alexandria was a cargo-carrying three-masted schooner built in 1929. Originally named Yngve, she was built at Björkenäs, Sweden, and fitted with a 58 H.P. auxiliary oil engine.
The following outline is provided as an overview of and topical guide to sailing: