10 Metre

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Current Specifications
Class Symbol
Crew	8
LOA	16.5 m (54 ft)
LWL	11 m (36 ft)
Beam	3 m (9.8 ft)
Draft	2.2 m (7 ft 3 in)
Hull weight	12,000 kg (26,000 lb)
Infobox last updated: 14-APR-2010
Former Olympic Class

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; 10mR boats are, on average, 16.5 meters long.

History

The 10mR was used as an Olympic Class during the 1912 and 1920 Olympics. 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 ever build.

Rule development

1907 Rule

Used from 1907–1920

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 1920–1933

where

• L = waterline length (LWL)
• G = chain girth
• d = difference between girth and chain
• S = sail area
• F = freeboard

Olympic results

1912 (1907 rule)

Swedish Kitty. Gold medalist at the 1912 Summer Olympics in Stockholm

Rank	Country	Helmsman	Crew
	Sweden (SWE)	HELLSTRÖM, Carl Ludwig	WALLERIUS, Eric G. WALLERIUS, Harald LUNDEN, Humbert NYBERG, Herman ROSENWÄRD, Harry ISBERG, Paul ERICSSON, Filip
	Finland (FIN)	WAHL, Harry	BJÖRKSTEN, Waldemar BJÖRNSTRÖM, Jacob Karl BRENNER, Bror Benedikt FRANCK, Allan LINDH, Erik PEKKALAINEN, Adolf Aarne
	Russia (RUS)	BELOSELSKY, Esper	BRASCHE, Ernest PUSCHNITSKY, Nikolaï RODIONOV, Aleksandr SCHOMAKER, Iossif STRAUCH, Filip LINDBLOM, Karl
4	Sweden (SWE)	LINDEN, Einar	LINDHOLM, Karl WALLER, Erik BOTHEN, Björn BOTHEN, Bertil FORSBERG, Wilhelm

1920 (1907 rule)

Only one boat at the starting line

Rank	Country	Helmsman	Crew
	Norway (NOR)	HERSETH, Erik Johan	HOLTER, Sigurd NIELSEN, Ingar JAMVOLD, Petter JAMVOLD, Gunnar JUELL, Claus

1920 (1919 rule)

Only one boat at the starting line

Rank	Country	Helmsman	Crew
	Norway (NOR)	ARENTZ, Charles Archer	GILBERT, Willy GJERTSEN, Robert SEJERSTED, Arne SCHJÖTT, Halfdan SCHJÖTT, Trygve FALKENBERG, Otto Gabriel Grubbe

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