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Clinker-built, also known as lapstrake-built, [1] [2] is a method of boat building in which the edges of longitudinal (lengthwise-running) hull planks overlap each other. Where necessary in larger craft, shorter hull planks can be joined end to end, creating a longer hull plank ( strake ).
Frames support the hull and give the ship its shape and strength. In wooden shipbuilding, each frame is composed of several sections, so that the grain of the wood can follow the curve of the frame. Starting from the keel, these are the floor (which crosses the keel and joins the frame to the keel), the first futtock , the second futtock , the ...
A sail plan is a drawing of a sailing craft, viewed from the side, depicting its sails, the spars that carry them and some of the rigging that supports the rig. [1] By extension, "sail plan" describes the arrangement of sails on a craft. [2] [3] A sailing craft may be waterborne (a ship or boat), an iceboat, or a sail-powered land vehicle.
Then, on a single day, the cement is applied by a team of plasterers. The cement:sand ratio is a very rich 4:1. As the hull thickness is typically 2.5 to 3 cms, ferrocement is unsuitable for boats less than about 15 metres LOA as there is a weight penalty; above that length there is no penalty. Properly plastered ferrocement boats have smooth ...
The boat displaces 170 lb (77 kg) and can be equipped with a spinnaker and trapeze. [1] [3] The boat has a draft of 4.00 ft (1.22 m) with the centreboard extended. With it retracted the boat can be beached or transported on a trailer or car roof rack. [1] The design has adopted changes over time. In 1966 construction of fibreglass was permitted.
Johnboats are available commercially between 8 and 24 feet (2.4 and 7.3 m) [2] long and 32 to 60 inches (81 to 152 cm) wide, though custom sizes may be found. The design includes an open hull, without a bilge, leaving the ribs exposed. Many users choose to cover the ribs, producing a flat, level surface.