View source for 10 Metre

{{more citations needed|date=June 2016}}
{{Infobox sailboat specifications
|image         = 
|class_symbol  = [[image:10MetreClassLogo.png|120x50px]]
|crew          = 8
|design=Development class
|loa           = {{convert|16.5|m|abbr=on}}
|lwl           = {{convert|11|m|abbr=on}}
|beam          = {{convert|3|m|abbr=on}}
|draft         = {{convert|2.2|m|abbr=on}}
|hull          = {{convert|12000|kg|abbr=on}}
|updated       = 14-APR-2010
|olympic       = former
}}

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 (sailing)|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 [[Sailing at the 1912 Summer Olympics|1912]] and [[Sailing at the 1920 Summer Olympics|1920 Olympics]].<ref>{{cite web|last1=Klawiński|first1=George|title=Yachts unusual: PESA|url=https://translate.google.com/translate?hl=en&US=auto&tl=en&u=http%3A%2F%2Fwww.zagle.com.pl%2Fdziennik-pokladowy%2Fjachty-niezwykle%2Fjachty-niezwykle-pesa%2C172_17716.html|publisher=Zagle|access-date=June 3, 2016}}</ref>
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
[[image:10 Metre Traditional.jpg|thumb]]
:<math>
10.000 \mbox{ metres} = \frac{L + B + 1/3G +3d + 1/3\sqrt{S} - F}{2}
</math>
where
* <math>L</math> = waterline length (LWL)
* <math>B</math> = beam
* <math>G</math> = chain girth
* <math>d</math> = difference between girth and chain
* <math>S</math> = sail area
* <math>F</math> = freeboard

=== 1919 Rule ===
Used from 1920 to 1933
[[image:10 Metre Stormvogel.jpg|thumb]]
:<math>
10.000 \mbox{ metres} = \frac{L + 0.25G +2d + \sqrt{S} - F}{2.5}
</math>
where
* <math>L</math> = waterline length (LWL)
* <math>G</math> = chain girth
* <math>d</math> = difference between girth and chain
* <math>S</math> = sail area
* <math>F</math> = freeboard

== Events ==

=== Olympics ===
{| {{MedalistTable|type=Event}}
 |-
| style="align:center;" | 1912 Stockholm <br>{{DetailsLink|Sailing at the 1912 Summer Olympics – 10 Metre}}
  |style="vertical-align:top;"|[[File:Flag of Sweden.svg|22x20px|border|alt=|link=|Sweden]]&nbsp;[[Sweden at the 1912 Summer Olympics|Sweden]]&nbsp;<span style="font-size:90%;">(SWE)</span><br>[[Filip Ericsson]]<br>[[Carl Hellström]]<br>[[Paul Isberg]]<br>[[Humbert Lundén]]<br>[[Herman Nyberg]]<br>[[Harry Rosenswärd]]<br>[[Erik Wallerius]]<br>[[Harald Wallin]]
                              |style="vertical-align:top;"|[[File:Flag of Russia.svg|22x20px|border|alt=|link=|Finland]]&nbsp;[[Finland at the 1912 Summer Olympics|Finland]]&nbsp;<span style="font-size:90%;">(FIN)</span><br>[[Harry Wahl]]<br>[[Waldemar Björkstén]]<br>[[Jacob Björnström]]<br>[[Bror Brenner]]<br>[[Allan Franck]]<br>[[Erik Lindh (sailor)|Erik Lindh]]<br>[[Juho Aarne Pekkalainen]]
                              |style="vertical-align:top;"|[[File:Flag of Russia.svg|22x20px|border|alt=|link=|Russia]]&nbsp;[[Russia at the 1912 Summer Olympics|Russia]]&nbsp;<span style="font-size:90%;">(RUS)</span><br>[[Esper Beloselsky]]<br>[[Ernest Brasche]]<br>[[Karl Lindholm]]<br>[[Nikolay Pushnitsky]]<br>[[Aleksandr Rodionov]]<br>[[Iosif Shomaker]]<br>[[Philipp Strauch (sailor)|Philipp Strauch]]

  |-
| style="align:center;" | 1920 Antwerp <br>1907 rule<br>{{DetailsLink|Sailing at the 1920 Summer Olympics – 10 Metre}}
  |style="vertical-align:top;"|[[File:Flag of Norway.svg|22x20px|border|alt=|link=|Norway]]&nbsp;[[Norway at the 1920 Summer Olympics|Norway]]&nbsp;<span style="font-size:90%;">(NOR)</span><br>[[Erik Herseth]]<br>[[Gunnar Jamvold]]<br>[[Petter Jamvold]]<br>[[Claus Juell]]<br>[[Sigurd Holter]]<br>[[Ingar Nielsen]]<br>[[Ole Sørensen (sailor)|Ole Sørensen]]
                                                   |style="vertical-align:top;"|No further competitors
                                                   |style="vertical-align:top;"|No further competitors

  |-
| style="align:center;" | 1920 Antwerp <br>1919 rule<br>{{DetailsLink|Sailing at the 1920 Summer Olympics – 10 Metre}}
  |style="vertical-align:top;"|[[File:Flag of Norway.svg|22x20px|border|alt=|link=|Norway]]&nbsp;[[Norway at the 1920 Summer Olympics|Norway]]&nbsp;<span style="font-size:90%;">(NOR)</span><br>[[Charles Arentz]]<br>[[Otto Falkenberg]]<br>[[Robert Giertsen]]<br>[[Willy Gilbert]]<br>[[Halfdan Schjött]]<br>[[Trygve Schjøtt]]<br>[[Arne Sejersted]]
                                                   |style="vertical-align:top;"|No further competitors
                                                   |style="vertical-align:top;"|No further competitors

|}

{{Olympic class sailboats}}

==References==
{{Reflist}}

{{DEFAULTSORT:10}}
[[Category:10 Metre| ]]
[[Category:Keelboats]]
[[Category:Olympic sailing classes]]
[[Category:Development sailing classes]]