10 Metre (keelboat)
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The International Ten Metre Class is a ''construction class'', meaning that the boats are not identical but are all designed to meet specific measurement formula, in this case International Rule. At their heyday, Metre Classes were the most important group of international yacht racing classes, and they are still actively raced around the world. "Ten" in class name does not, somewhat confusingly, refer to length of the boat, but product of the formula; 10 Metre boats are, on average, 16.5 meters long.


History

The 10 Metre was used as an Olympic Class during the
1912 This year is notable for Sinking of the Titanic, the sinking of the ''Titanic'', which occurred on April 15. In Albania, this leap year runs with only 353 days as the country achieved switching from the Julian to Gregorian Calendar by skippin ...
and
1920 Olympics The 1920 Summer Olympics (; ; ), officially known as the Games of the VII Olympiad (; ; ) and commonly known as Antwerp 1920 (; Dutch language, Dutch and German language, German: ''Antwerpen 1920''), were an international multi-sport event held i ...
. The International Rule was set up in 1907 to replace earlier, simpler handicap system which were often local or at best, national, and often also fairly simple, producing extreme boats which were fast but lightly constructed and impractical. The rule changes several times in history. About 20 boats were built.


Rule development


1907 Rule

Used from 1907 to 1920
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: 10.000 \mbox = \frac where * L = waterline length (LWL) * B = beam * G = chain girth * d = difference between girth and chain * S = sail area * F = freeboard


1919 Rule

Used from 1920 to 1933
thumb The thumb is the first digit of the hand, next to the index finger. When a person is standing in the medical anatomical position (where the palm is facing to the front), the thumb is the outermost digit. The Medical Latin English noun for thumb ...
: 10.000 \mbox = \frac where * L = waterline length (LWL) * G = chain girth * d = difference between girth and chain * S = sail area * F = freeboard


Events


Olympics


References

{{DEFAULTSORT:10 Keelboats Olympic sailing classes Development sailing classes