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He spent much of his life in San Diego, California, beginning to design multihulls in the 1950s, starting with catamarans. [1] His full-time multihull development work began in 1968. [ 1 ]
USA-17—a 90-foot-long (27 m) trimaran, type BOR90. A traditional paraw double-outrigger sailboat from the Philippines. A trimaran (or double-outrigger) is a multihull boat that comprises a main hull and two smaller outrigger hulls (or "floats") which are attached to the main hull with lateral beams.
Constant Camber 26 is a 26 ft (7.9 m) cruising sloop trimaran sailboat designed in the 1970s by John Marples featuring berths for two adults and two children. [1] [2] The constant camber hull is constructed using a single master template to produce each panel, resulting in a design with unchanging curvature, imparting extraordinary strength similar to an eggshell.
Tumblehome or tumble home is the narrowing of a hull above the waterline, giving less beam at the level of the main deck. The opposite of tumblehome is flare . A small amount of tumblehome is normal in many naval architecture designs in order to allow any small projections at deck level to clear wharves .
The design concept comprises a narrow, long hull that cuts through waves. The outriggers then provide the stability that such a narrow hull needs. While the aft sponsons act as trimaran sponsons do, the front sponsons do not touch the water normally; only if the ship rolls to one side do they provide added buoyancy to correct the roll.
In 1962, Piver built himself a 35-foot ketch-rigged trimaran named Lodestar and sailed it around the Pacific Ocean via New Zealand. [citation needed] In England, Cox Marine started building his boats and found a ready market, often with Americans who would sail them home. In 1964, Derek Kelsall bought a Lodestar bare hull, completed it with a ...
Jim Brown stayed with Piver's narrow-waisted hulls while introducing the centerboard, center cockpit, and cutter rig. Of the 47 multihulls we spoke outside U.S. waters, 13 were Brown designs. While poor payload capacity and hobby-horsing are owner complaints with the 31 and 37, his 40-footer gets high marks.
The Searunner 31 is a trimaran sailboat designed by Jim Brown in the 1960s. [2] It is the most popular boat in the Searunner series, [1] which includes models from 25 ft (7.6 m) to 40 ft (12 m). The Searunner 31 is a small, trailerable trimaran sailboat known for its performance, versatility, and seaworthiness.