10 Metre (keelboat)

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Current Specifications
10MetreClassLogo.png
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[edit]

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[edit]

1907 Rule[edit]

Used from 1907–1920

10 Metre Traditional.jpg

10.000 \mbox{ metres} = \frac{L + B + 1/3G +3d + 1/3\sqrt{S} - F}{2}

where

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

1919 Rule[edit]

Used from 1920–1933

10 Metre Stormvogel.jpg

10.000 \mbox{ metres} = \frac{L + 0.25G +2d + \sqrt{S} - F}{2.5}

where

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

Olympic results[edit]

1912 (1907 rule)[edit]

Swedish Kitty. Gold medalist at the 1912 Summer Olympics in Stockholm
Rank Country Helmsman Crew
1  Sweden (SWE) HELLSTRÖM, Carl Ludwig WALLERIUS, Eric G.
WALLERIUS, Harald
LUNDEN, Humbert
NYBERG, Herman
ROSENWÄRD, Harry
ISBERG, Paul
ERICSSON, Filip
2  Finland (FIN) WAHL, Harry BJÖRKSTEN, Waldemar
BJÖRNSTRÖM, Jacob Karl
BRENNER, Bror Benedikt
FRANCK, Allan
LINDH, Erik
PEKKALAINEN, Adolf Aarne
3  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)[edit]

Only one boat at the starting line

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

1920 (1919 rule)[edit]

Only one boat at the starting line

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