Engineering:10 Metre

10 Metre

120x50px Class symbol
Development
Design	Development class
Boat
Crew	8
Draft	2.2 m (7 ft 3 in)
Hull
Hull weight	12,000 kg (26,000 lb)
LOA	16.5 m (54 ft)
LWL	11 m (36 ft)
Beam	3 m (9.8 ft)
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; 10 Metre boats are, on average, 16.5 meters long.

History

The 10 Metre 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 built.

Rule development

1907 Rule

Used from 1907 to 1920 thumb

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

where

• [math]\displaystyle{ L }[/math] = waterline length (LWL)
• [math]\displaystyle{ B }[/math] = beam
• [math]\displaystyle{ G }[/math] = chain girth
• [math]\displaystyle{ d }[/math] = difference between girth and chain
• [math]\displaystyle{ S }[/math] = sail area
• [math]\displaystyle{ F }[/math] = freeboard

1919 Rule

Used from 1920 to 1933 thumb

[math]\displaystyle{ 10.000 \mbox{ metres} = \frac{L + 0.25G +2d + \sqrt{S} - F}{2.5} }[/math]

where

• [math]\displaystyle{ L }[/math] = waterline length (LWL)
• [math]\displaystyle{ G }[/math] = chain girth
• [math]\displaystyle{ d }[/math] = difference between girth and chain
• [math]\displaystyle{ S }[/math] = sail area
• [math]\displaystyle{ F }[/math] = freeboard

Events

Olympics

|-

| style="align:center;" | 1912 Stockholm

 |style="vertical-align:top;"| Sweden (SWE)
Filip Ericsson
Carl Hellström
Paul Isberg
Humbert Lundén
Herman Nyberg
Harry Rosenswärd
Erik Wallerius
Harald Wallin
                             |style="vertical-align:top;"| Finland (FIN)
Harry Wahl
Waldemar Björkstén
Jacob Björnström
Bror Brenner
Allan Franck
Erik Lindh
Juho Aarne Pekkalainen
                             |style="vertical-align:top;"| Russia (RUS)
Esper Beloselsky
Ernest Brasche
Karl Lindholm
Nikolay Pushnitsky
Aleksandr Rodionov
Iosif Shomaker
Philipp Strauch

 |-

| style="align:center;" | 1920 Antwerp
1907 rule

 |style="vertical-align:top;"| Norway (NOR)
Erik Herseth
Gunnar Jamvold
Petter Jamvold
Claus Juell
Sigurd Holter
Ingar Nielsen
Ole Sørensen
                                                  |style="vertical-align:top;"|No further competitors
                                                  |style="vertical-align:top;"|No further competitors

 |-

| style="align:center;" | 1920 Antwerp
1919 rule

 |style="vertical-align:top;"| Norway (NOR)
Charles Arentz
Otto Falkenberg
Robert Giertsen
Willy Gilbert
Halfdan Schjött
Trygve Schjøtt
Arne Sejersted
                                                  |style="vertical-align:top;"|No further competitors
                                                  |style="vertical-align:top;"|No further competitors

|}