Retractable keel which pivots out of a slot in the hull of a sailboat
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A centreboard or centerboard (US)[1] 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 to operate in shallow waters, to move the centre of lateral resistance (offsetting changes to the sailplan that move the centre of effort aft), to reduce drag when the full area of the centreboard is not needed, or when removing the boat from the water, as when trailering. A centreboard which consists of solely a pivoting metal plate is called a centerplate. A daggerboard is similar but slides vertically rather than pivoting.
The analog in a scow is a bilgeboard: these are fitted in pairs and used one at a time.
^"What's the deal with Centerboards?". Sailing Soulianis. 21 March 2020. Retrieved March 10, 2022.
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)...
A daggerboard is a retractable centreboard used by various sailing craft. While other types of centreboard may pivot to retract, a daggerboard slides...
mounted in pairs on each side of a hull, leeboards function much like a centreboard, allowing shallow-draft craft to ply waters fixed keel boats cannot....
Nationality 2015 present Centreboard 470 470 World Championships Fleet Open – 1970 1984 annually no longer held Centreboard 470 470 World Championships...
rigging, engine, transmission, propeller), or controls (helm, rudder, centreboard, daggerboards, rigging). Similarly, after a dismasting, a replacement...
weighted bulb, or an optional stub keel with a bottom beaching plate, centreboard and twin rudders to allow it to remain upright when beached. The fin...
reason being that a centreboard/keel is not needed for sailing downwind and simply adds to the drag of the hull. Raising the centreboard reduces drag and...
five essential controls: the sails the foils (i.e. the daggerboard or centreboard and rudder and sometimes lifting foils as found on the Moth) the trim...
weighs 500 kilograms. The draft can vary, depending on whether it has a centreboard, between 0.55 and 1.15 meters. The mainsail has a surface area of 11...
and a stub keel with a centreboard. It displaces 2,348 lb (1,065 kg). The boat has a draft of 4.00 ft (1.22 m) with the centreboard extended and 1.50 ft...
killing prey. The submerged dorsal sail would have provided a strong centreboard-like counterforce for powerful sidewards movements of the strong neck...
rudders controlled by a tiller and a fixed stub keel with a retractable centreboard. It displaces 2,745 lb (1,245 kg) empty and carries 661 lb (300 kg) of...
The European championships in sailing are a series of sailing championships in Europe organized or sanctioned by the European Sailing Federation (EUROSAF)...
comment that designing a multihull is similar to designing an aircraft. A centreboard or daggerboard is retractable lightweight keel which can be pulled up...
the wheelhouse. It has a fixed stub fin keel and a retractable steel centreboard. It displaces 17,637 lb (8,000 kg) and carries 5,000 lb (2,268 kg) of...
gaff rigged, though Bermuda rig is also used. Most are fitted with a centreboard, although some have a keel. The hull can be 3.7 to 12.2 metres (12 to...
sailboats can normally be righted by standing or pulling down on the centreboard, daggerboard (or bilgeboard in a scow) to lift the mast clear of the...
make a compact package. Racing dinghies usually have a daggerboard or centreboard to better sail upwind. The trunk is in the middle of what would otherwise...
1962 Triumph Herald sailboat, updated with a collapsible mast and a centreboard keel, Hammond creates another houseboat out of a second 1981 Volkswagen...
performance of the ship was poor by modern standards as there was no centreboard, deep keel or leeboard. To assist in tacking the beitaass kept the luff...
1 m (125 ft) (overall) Beam 8.2 m (27 ft) Draught 2.4 m (7.9 ft) with centreboard up, 3.9 m (13 ft) extended Propulsion sail of 465 m2; auxiliary diesel...
draft of 4.76 ft (1.45 m), while the centreboard-equipped version has a draft of 6.08 ft (1.85 m) with the centreboard extended and 2.75 ft (0.84 m) with...
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