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Australia II was designed by Ben Lexcen, built by Steve Ward, owned by Alan Bond and skippered by John Bertrand. [2] Lexcen's Australia II design featured a reduced waterline length and a short chord winged keel which gave the boat a significant advantage in manoeuvrability and heeling moment (lower ballast centre of gravity) but it was a significant disadvantage in choppy seas.
Under the 12 metre class rule, the allowed sail area is an inverse function of the boat length and weight. Her stability advantage allowed Australia II to carry more sail although the boat was lighter. Along with Australia II ' s efficient sail design, this winged keel was one of the factors contributing to Australia II ' s success. Total ...
Benjamin Lexcen AM (born Robert Clyde Miller, 19 March 1936 – 1 May 1988) was an Australian yachtsman and marine architect.He is famous for the winged keel design applied to Australia II which, in 1983, became the first non-American yacht to win the prestigious America's Cup in 132 years.
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 water, while modern recreational keelboats have prominent fixed fin keels, and considerable draft. The ...
The Austral 20 is a roomy and easy to sail design, for which Austral Yachts won a design award in 1979. The hull is fibreglass construction with built in flotation. The hull contains 68 kg (150 lb) of lead moulded into the keel plus another 145 kg (320 lb) in the plate centreboard.
The boat was selected as an Olympic class and raced at the 1972 and the 1976 Summer Olympics. [1] [3] The boat is supported by an active class club that organizes racing events, the International Tempest Class Association. [7] In a 1994 review Richard Sherwood wrote, "the International Class Tempest was an Olympic boat in 1972 and 1976. She is ...
The hull is a hard chine design with a slight curve to the bottom section, and a bulb keel. The Star was originally rigged with a large, low-aspect-ratio gunter mainsail and jib, which was replaced by a short bermuda rig gradually during the early 1920s, before the current tall bermuda sail plan was adopted in 1930.
Flying Fifteen. The Flying Fifteen is a racing keelboat, originally built from wood and more recently of fibreglass.It has a fractional sloop rig, a spooned and highly raked stem, a plumb, raised counter transom, an internally mounted spade-type rudder controlled by a tiller with an extension and a swept fixed fin keel.