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The Core Sound 20 Mark 3 is an American sailboat 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. [1] [2] The Core Sound 20 Mark 3 is a development of the Core Sound 20 and is named for the North Carolinian body of water. [2]
A fore and aft, pivoting centreboard can also be used to move the centre of lateral resistance aft to match a change in sail plan, such as furling or dropping the jib. A retracting centreboard is more complex than a fixed keel, and most take up space inside the hull of the boat that could otherwise be used for passenger accommodation. Other ...
When a small sailboat flips on its side, the keel can also be used to right the boat. Standing on the keel gives the sailor additional leverage to roll the hull upright. The centerboard, daggerboard, or bilgeboard can be used as a platform upon which to stand, providing increased leverage, in the event the dinghy overturns via a capsize or turtle.
The boat has a draft of 2.04 ft (0.62 m) with the centerboard extended and 1.25 ft (0.38 m) with it retracted, allowing operation in shallow water or ground transportation on a trailer. [ 1 ] [ 2 ] The boat is normally fitted with a small 2 to 5 hp (1 to 4 kW) outboard motor for docking and maneuvering.
The JY15 is a recreational, planing hull, sailing dinghy, built predominantly of Advanced Composite Process (ACP) by JY Sailboats and Hunter and later from fiberglass by Nickels and WindRider. It has a fractional sloop , a raked stem , a vertical transom , a transom-hung rudder controlled by a tiller with an extension and a folding centerboard .
The centerboard is two part, with a bronze shoe on the leading edge. The centerboard trunk was molded into the hull, below the cabin sole. Internal lead ballast was cast in place and covered in fiberglass. Fuel and water tanks were molded in fiberglass integral to the hull. An overlapping deck to hull joint was bolted together and sealed with ...
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The Thunderbird class sailboat was designed in 1958 by Seattle Washington naval architect Ben Seaborn, [1] in response to a request from the Douglas Fir Plywood Association (now APA - The Engineered Wood Association) of Tacoma, Washington for design proposals for a sailboat that would "... be both a racing and cruising boat; provide sleeping accommodations for four crew; be capable of being ...