Reliance (yacht)
Reliance was the 1903 America's Cup defender designed by Nat Herreshoff.
Reliance was funded by a nine-member syndicate of members of the New York Yacht Club headed by Cornelius Vanderbilt III.
Reliance was designed to take full advantage of the Seawanhaka '90-foot' rating rule and was suitable only for use in certain conditions. The 1903 America's Cup was the last to be raced according to the Seawanhaka rule.
Design
The design took advantage of a loophole in the Seawanhaka "90-foot" rating rule, to produce a racing yacht with long overhangs at each end, so that when heeled over, her waterline length increased dramatically. Because a boat's hull speed is a function of its waterline length, Reliance's top speed therefore was dramatically higher.To save weight, she was completely unfinished below deck, with exposed frames. Reliance was the first racing boat to be fitted with winches below decks, in an era when her competitors relied on sheer man-power. Despite this a crew of 64 was required for racing due to the large sail plan.
From the tip of her bowsprit to the end of her boom, Reliance measured, and the tip of her mast was above the water. Everything else was to an equally gargantuan scale; her spinnaker pole was long, and her total sail area of was the equivalent of eight 12 meter class yachts.
Reliance was built for one purpose: to successfully defend the America's Cup.