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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.
In terms of both design and construction, it is one of the more seaworthy 30 footers available on the used market in Canada. Nevertheless, the age of the Alberg 30 design translates into a boat with a narrow beam and limited interior room, and its full keel means it will not have the same pointing ability as a fin keel boat.
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.
Yngling. The Yngling is a racing keelboat, built predominantly of fibreglass, with wood trim.It has a fractional sloop rig with aluminum spars. The hull has a spooned raked stem, a raised counter reverse transom, an internally mounted spade-type rudder controlled by a tiller and a swept fixed fin keel.
Australia (KA–5) is an Australian 12-metre-class America's Cup racing yacht that twice challenged unsuccessfully for the America's Cup in 1977 and 1980. Designed by Ben Lexcen in association with the Dutch designer Johan Valentijn for Alan Bond, Australia failed to win a single race against the 1977 defender, Courageous (US-26), but won one race against the 1980 defender, Freedom (US-30).
The design was built by Ouyang Boat Works in Canada, between 1971 and about 1979, but it is now out of production. [1] [3] [4]Other versions of the boat were built from plywood with a hard-chined hull and a fractional rigged sloop configuration were built by other companies in Australia, the United Kingdom and South Africa.
The term keel was associated in Great Britain with three particular working boat types. The Norfolk Keel ancestor of the Norfolk Wherry, the Humber Keel and the Tyne Keel and their Keelmen. In Ireland the Howth 17 was designed by Sir Walter Boyd in 1897, and is the oldest one-design racing keelboat in the world.