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Lateral mast section. For rigs with large spreader angles, lateral stiffness is of higher importance than longitudinal stiffness. This is the result of a large spreader angle creating longitudinal stability, whereas the lateral stability is achieved by the geometry of the mast section. This makes for a mast section which is wider and rounder than the corresponding longitudinal section and therefore the number of spreaders can be reduced. These sections are popular for upgrading a boat from the �s with a traditional style single spreader rig, but still with all the benefits of modern fun. Dinghy rigging stepping a mast and keel stepped mast dinghy rigging guide stepping the mast on a sailboat. Types of Sailboat Rigging. Before knowing how to rig a sailboat or dinghy, and understanding of the various sailboat rigging types is required: Single handed (one-person) sailing dinghies usually having a single sail, fitted onto an [ unstayed mast ] housed in a large tube or mast support at the front of the sailing dinghy. Two-person sailing dinghies, have two or more sails, and a mast which is supported or stayed by three wires. The mast foot can be either housed on the deck [ deck-step. Aluminium masts. All Seldn dinghy mast sections have been designed to give the best stiffness to weight ratio available in an alloy extrusion. Material, section shape and size, and wall thickness all have a major effect on both the static and dynamic bend characteristics of a tube. These details are studied in the design of every section and are carefully checked on every piece of spar tube we use.

The mast of a sailing vessel is a tall spar , or arrangement of spars, erected more or less vertically on the centre-line of a ship or boat. Its purposes include carrying sails , spars, and derricks , and giving necessary height to a navigation light , look-out position , signal yard , control position , radio aerial or signal lamp.

Nearly all sailing masts are guyed. Until the midth century, all vessels' masts were made Building A Dinghy Wooden Queue of wood formed from a single or several pieces of timber which typically consisted of the trunk of a conifer tree. From the 16th century, vessels were often built of a size requiring masts taller and thicker than could be made from single tree trunks. On these larger vessels, to achieve the required height, the masts were built from up to four sections also called masts , known in order of rising height above the decks as the lower, top, topgallant and royal masts.

Such a section was known as a made mast , as opposed to sections formed from single pieces of timber, which were known as pole masts. Those who specialised in making masts were known as mastmakers.

For square-sail carrying ship , the masts, given their standard names in bow to stern front to back order, are:. Some names given to masts in ships carrying other types of rig where the naming is less standardised are:. When a vessel has two masts, as a general rule, the main mast is the one setting the largest sail. Therefore, in a brig , the forward mast is the foremast and the after mast is the mainmast.

In a schooner with two masts, even if the masts are of the same height, the after one usually carries a larger sail because a longer boom can be used , so the after mast is the mainmast.

This contrasts with a ketch or a yawl , where the after mast, and its principle sail, is clearly the smaller of the two - so the terminology is from forward mainmast and mizzen.

In a yawl, the term "jigger" is occasionally used for the after mast. Some two-masted luggers have a fore-mast and a mizzen-mast - there is no main-mast. This is because these traditional types used to have three masts, but it was found convenient to dispense with the main-mast and carry larger sails on the remaining masts. This gave more working room, particularly on fishing vessels. On square-rigged vessels, each mast carries several horizontal yards from which the individual sails are rigged.

Folding mast ships use a tabernacle anchor point. Definitions include: "the partly open socket or double post on the deck, into which a mast is fixed, with a pivot near the top so that the mast can be lowered"; [10] "large bracket attached firmly to the deck, to which the foot of the mast is fixed; it has two sides or cheeks and a bolt forming the pivot around which the mast is raised and lowered"; "substantial fitting for mounting the mast on deck, so that it can be lowered easily for trailering or for sailing under bridges", [11] "hinged device allowing for the easy folding of a mast 90 degrees from perpendicular, as for transporting the boat on a trailer, or passing under a bridge" [12].

In the West, the concept of a ship carrying more than one mast, to give it more speed under sail and to improve its sailing qualities, evolved in northern Mediterranean waters: The earliest foremast has been identified on an Etruscan pyxis from Caere , Italy , dating to the mid-7th century BC: a warship with a furled mainsail is engaging an enemy vessel, deploying a foresail. Artemon , along with mainsail and topsail , developed into the standard rig of seagoing vessels in imperial times , complemented by a mizzen on the largest freighters.

Throughout antiquity , both foresail and mizzen remained secondary in terms of canvas size, although large enough to require full running rigging. By the onset of the Early Middle Ages , rigging had undergone a fundamental transformation in Mediterranean navigation: the lateen which had long evolved on smaller Greco-Roman craft replaced the square rig , the chief sail type of the ancients, that practically disappeared from the record until the 14th century while it remained dominant in northern Europe.

Their length has been estimated at about 12 m and 8 m respectively, somewhat smaller than the Sicilian war galleys of the time.

Large vessels were coming more and more into use and the need for additional masts to control these ships adequately grew with the increase in tonnage. Unlike in antiquity, the mizzen-mast was adopted on medieval two-masters earlier than the foremast, a process which can be traced back by pictorial evidence from Venice and Barcelona to the midth century. To balance out the sail plan the next obvious step was to add a mast fore of the main-mast, which first appears in a Catalan ink drawing from With the three-masted ship established, propelled by square rig and lateen, and guided by the pintle -and- gudgeon rudder , all advanced ship design technology necessary for the great transoceanic voyages was in place by the beginning of the 15th century.

The first hollow mast was fitted on the American sloop Maria in , 28 m 92 ft long and built of staves bound with iron hoops like a barrel. Other hollow masts were made from two tapered timbers hollowed and glued together. Although sailing ships were superseded by engine-powered ships in the 19th century, recreational sailing ships and yachts continue to be designed and constructed. In the s aluminum masts were introduced on large J-class yachts. An aluminum mast has considerable advantages over a wooden one: it is lighter and slimmer than a wooden one of Plans For Building A Dinghy Zeros the same strength, is impervious to rot, and can be produced as a single extruded length.

During the s wood was eclipsed by aluminum. Aluminum alloys, generally series, are commonly utilised. Recently some sailing yachts particularly home-built yachts have begun to use steel masts. Whilst somewhat heavier than aluminum, steel has its own set of advantages.

It is significantly Building A Nesting Dinghy Objectives cheaper, and a steel mast of an equivalent strength can be smaller in diameter than an aluminum mast, allowing less turbulence and a better airflow onto the sail.

From the mids racing yachts introduced the use of carbon fibre and Building A Clinker Dinghy Object other composite materials to construct masts with even better strength-to-weight ratios.

Carbon fibre masts could also be constructed with more precisely engineered aerodynamic profiles. Modern masts form the leading edge of a sail's airfoil and tend to have a teardrop-shaped cross-section. On smaller racing yachts and catamarans, the mast rotates to the optimum angle for the sail's airfoil.

If the mast has a long, thin cross-section and makes up a significant area of the airfoil, it is called a wing-mast; boats using these have a smaller sail area to compensate for the larger mast area.

There are many manufacturers of modern masts for sailing yachts of all sizes, a few notable companies are Hall Spars, Offshore Spars , and Southern Spars. After the end of the age of sail , warships retained masts, initially as observation posts and to observe fall of shot , also holding fire control equipment such as rangefinders , and later as a mounting point for radar and telecommunication antennas, which need to be mounted high up to increase range.

Simple pole, lattice , and tripod masts have been used�also, on some past Japanese warships, complex pagoda masts. USS Nevada with lattice masts. HMS Invincible with tripod masts. SMS Scharnhorst with pole masts. Nagato with pagoda mast.

From Wikipedia, the free encyclopedia. Dictionary of nautical words and terms. Seamanship in the Age of Sail, pp. ISBN The Price of Admiralty. New York: Viking. Square Riggers in the United States and Canada, pp. Sailing Rigs, an Illustrated Guide. London: Chatham Publishing. ISBN 1 7. ISBN 0 2. Sea Talk Nautical Dictionary. Your Dictionary. MacIntosh ; Steinmayer, A. The Byzantine Navy ca. Peoples, Economies and Cultures, �, Vol. Rigs and Rigging of Yachts. Yacht Mollymawk. Retrieved 1 August Sails , spars and rigging.

Bowsprit Sprit topmast Dolphin striker Jackstaff Jibboom. Earing Parrel beads Roller furling. Parts of a sailing ship.

Categories : Sailing rigs and rigging Windsurfing equipment Wood products History of forestry. Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file. Download as PDF Printable version. Wikimedia Commons. GND : MA :


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