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In answer to Lipton’s challenge of 1929 the Americans designed four J-Class yachts as possible defenders. Enterprise, Whirlwind, Yankee and Weetamoe were launched within a month of each other; Weetamoe and Enterprise from the Herreshoff yard and Yankee and Whirlwind from Lawley & Son’s yard in Bristol.
Whirlwind, the second J, was the most revolutionary of the four.
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Whirlwind was the last of the four "J" class yachts to be ordered in 1929, and for this reason her designer choose composite construction for her, as the very limited number of workmen trained in light plating for yachts were already absorbed by the other three "J's" Enterprise, Weetamoe and Yankee. And so, Whirlwind's construction is very similar to that of Britannia, she should last as long as the royal cutter which was still racing after a long life of forty-two years.
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