The Core Sound 20 Mark 3 is an American

sailboat A sailboat or sailing boat is a boat propelled partly or entirely by sails and is smaller than a sailing ship. Distinctions in what constitutes a sailing boat and ship vary by region and maritime culture. Types Although sailboat terminology ...

that was designed by B&B Yacht Designs for cruising and first built in 2014. The boat is supplied as a series of kits and plans for amateur construction. The Core Sound 20 Mark 3 is a development of the Core Sound 20 and is named for the North Carolinian body of water.

Production

The design's kits are supplied by B&B Yacht Designs of Bayboro, North Carolina,

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. The kit includes pre-cut wooden components, cut with a

CNC machine Computer numerical control (CNC) or CNC machining is the automated control of machine tools by a computer. It is an evolution of numerical control (NC), where machine tools are directly managed by data storage media such as punched cards or ...

. There are individual kits for the hull, portals,

centerboard A centreboard or centerboard (US) is a retractable hull appendage which pivots out of a slot in the hull of a sailboat, known as a ''centreboard trunk'' (UK) or ''centerboard case'' (US). The retractability allows the centreboard to be raised t ...

and

rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, airship, or other vehicle that moves through a fluid medium (usually air or water). On an airplane, the rudder is used primarily to counter adverse yaw ...

mast Mast, MAST or MASt may refer to: Engineering * Mast (sailing), a vertical spar on a sailing ship * Flagmast, a pole for flying a flag * Guyed mast, a structure supported by guy-wires * Mooring mast, a structure for docking an airship * Radio mas ...

sails A sail is a tensile structure, which is made from fabric or other membrane materials, that uses wind power to propel sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and even sail-powered land vehicles. Sails may b ...

, rigging and lines,

epoxy Epoxy is the family of basic components or Curing (chemistry), cured end products of epoxy Resin, resins. Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers and polymers which contain epoxide groups. The epoxide fun ...

and

fiberglass Fiberglass (American English) or fibreglass (English in the Commonwealth of Nations, Commonwealth English) is a common type of fibre-reinforced plastic, fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened i ...

. Additional wood is required for hull stringers and other parts to complete the boat.

Design

Core Sound 20 Mk III sailboat Nimbus 2020 1317

The Core Sound 20 Mark 3 is a recreational

keelboat A keelboat is a riverine cargo-capable working boat, or a small- to mid-sized recreational sailing yacht. The boats in the first category have shallow structural keels, and are nearly flat-bottomed and often used leeboards if forced in open w ...

, built predominantly of

stitch and glue Stitch and glue is a simple boat building method which uses plywood panels temporarily stitched together, typically with wire or zip-ties, and glued together permanently with epoxy resin. This type of construction can eliminate much of the need f ...

okume

wood Wood is a structural tissue/material found as xylem in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulosic fibers that are strong in tension and embedded in a matrix of lignin t ...

, with two unstayed

aluminum Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has ...

masts. It has a loose-footed

cat The cat (''Felis catus''), also referred to as the domestic cat or house cat, is a small domesticated carnivorous mammal. It is the only domesticated species of the family Felidae. Advances in archaeology and genetics have shown that the ...

ketch A ketch is a two- masted sailboat whose mainmast is taller than the mizzen mast (or aft-mast), and whose mizzen mast is stepped forward of the rudder post. The mizzen mast stepped forward of the rudder post is what distinguishes the ketch f ...

rig with wishbone booms, a slightly

raked stem The stem is the most forward part of a boat or ship's bow and is an extension of the keel itself. It is often found on wooden boats or ships, but not exclusively. Description The stem is the curved edge stretching from the keel below, up to ...

, a plumb transom, a transom-hung

controlled by a

tiller A tiller or till is a lever used to steer a vehicle. The mechanism is primarily used in watercraft, where it is attached to an outboard motor, rudder post, rudder post or stock to provide leverage in the form of torque for the helmsman to turn ...

, a self-draining cockpit and a retractable centerboard

keel The keel is the bottom-most longitudinal structural element of a watercraft, important for stability. On some sailboats, it may have a fluid dynamics, hydrodynamic and counterbalancing purpose as well. The keel laying, laying of the keel is often ...

. It displaces and carries of lead ballast in the centerboard tip. The centerboard is of wood, covered with glass cloth and epoxy. It also has a

flooding water ballast A trailer sailer is a type of sailboat that has been designed to be easily transported using a boat trailer towed by an automobile. They are generally larger than a sailing dinghy.Royce, Patrick M.: ''Royces Sailing Illustrated'', pages 52-57. D ...

tank, which is drained for road transport. In 2018, the original design was modified to add a

mizzen mast The mast of a sailing ship, sailing vessel is a tall spar (sailing), spar, or arrangement of spars, erected more or less vertically on the median plane, median line of a ship or boat. Its purposes include carrying sails, spars, and derricks, givi ...

tabernacle to allow easier rigging, as well as greater cabin headroom and simplified construction. The design has provisions for a portable style

head A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple ani ...

. Earlier versions of the boat have a draft of with the centreboard extended and with it retracted, allowing beaching or ground transportation on a trailer. Later kits, starting with serial number 20, have a longer centerboard, giving a draft of . The boat is normally fitted with a small

outboard motor An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method ...

for docking and maneuvering.

References

External links

*{{Official website, https://bandbyachtdesigns.com/20mk3plans Keelboats 2010s sailboat type designs Sailing yachts Sailboat type designs by B&B Yacht Designs Sailboat types built by B&B Yacht Designs

Production

Design

See also

References

External links