Ton class

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For the naval vessels, see Ton-class minesweeper.

Ton classes are categories used to identify classes of yachts.

Thames Tonnage[edit]

Early attempts at creating rating rules were based on the British "old tonnage measurement" system to calculate the volume of the hold of large commercial ships. It gave the vessel's carrying capacity in tons (at 35 cubic feet per ton) or, as some believe, in tuns. Sail area was not included, of course, nor were any credits given for less efficient rigs so, naturally, in the yacht-racing field the cutters predominated. Eventually, this rule was modified in 1854 as the Thames Measurement Rule:

{{Thames Tonnage}} = \frac {({length}-{beam}) \times {beam}^2} {188}

where:

  • length is the length, in feet, from the stempost to sternpost;
  • beam is the maximum beam, in feet.

Godinet rule[edit]

Lérina during a sailing competition
Modification to the rule in 1901

The Godinet rule was adopted in 1892 by the "Union des yachts français", and was quickly adopted by other nations from the European continental. It allowed the classifications of yachts by tons, with a formula established by Auguste Godinet which considers displacement, length, and the total sail area.

T=\frac {(L- 0.25P) \cdot P \cdot \sqrt{S}} {130}

where:

  • L = LWL
  • P = girth of the hull
  • S = Sail area
  • T = Rule in tons

The Société Nautique de Genève, which was an early adopter of the rule, amended it in 1901 to include the skin girth instead of the chain girth.

This new French rule was adopted in December 1892 by Switzerland followed by Germany, Denmark, Finland and Sweden in March 1893. Belgium and Spain completed the list. In March 1894 the Godinet rule is first noted in the United States, at the construction of the Vendenesse, the world's first aluminium yacht.

Some yacht in existence that were designed to the Godinet rule:

  • Bona Fide: designed by Charles Sibbick in 1898 to rate as a 5-tonner. It was built at the Albert Yard, Cowes, for J.Howard Taylor, who laterwon the Gold medal in the category 3 to 10 tons at the 1900 Olympics. This yacht was authentically restored between 1999 and 2003 by the Cantiere Navale dell'Argentario, in Tuscany and is the last 19th century Godinet rater.
  • Calypso: designed and built in 1911 to rate as a 3-tonner

Olympic Games[edit]

The Ton classes where Olympic classes 1900 and probably also on that of 1896. Unfortunately due to weather conditions the yacht races in 1896 where cancelled and much information of that event is not longer available. For the 1900 events, sailing categories are established based on the Godinet rule:

  • 0.5 Ton
  • 0.5 – 1 Ton
  • 1 - 2 Ton
  • 2 - 3 Ton
  • 3 - 10 Ton
  • 10 – 20 Ton
  • Open Class

1900 Olympics France[edit]

Event Gold Silver Bronze
NO Class insigna.png

1900: Open class
details

 Great Britain (GBR)
Lorne Currie
John Gretton
Linton Hope
Algernon Maudslay

 Germany (GER)
Paul Wiesner
Georg Naue
Heinrich Peters
Ottokar Weise

 France (FRA)
Émile Michelet

NO Class insigna.png

1900: 0 to .5 ton
Race: 1
details

 France (FRA)
Pierre Gervais

 France (FRA)
Texier (helmsman)
Texier (crew)
Jean-Baptiste Charcot
Robert Linzeler

 France (FRA)
Henri Monnot
Léon Tellier
Gaston Cailleux

NO Class insigna.png

1900: 0 to .5 ton
Race: 2
details

 France (FRA)
Émile Sacré

 France (FRA)
Texier (helmsman)
Texier (crew)
Jean-Baptiste Charcot
Robert Linzeler

 France (FRA)
Pierre Gervais

NO Class insigna.png

1900: .5 to 1 ton
Race: 1
details

 Great Britain (GBR)
Lorne Currie
John Gretton
Linton Hope
Algernon Maudslay

 France (FRA)
Jules Valton
Félix Marcotte
William Martin
Jacques Baudrier
Jean Le Bret

 France (FRA)
Émile Michelet
Marcel Meran

NO Class insigna.png

1900: .5 to 1 ton
Race: 2
details

 France (FRA)
Louis Auguste-Dormeuil

 France (FRA)
Émile Michelet
Marcel Meran

 France (FRA)
Jules Valton
Félix Marcotte
William Martin
Jacques Baudrier
Jean Le Bret

NO Class insigna.png

1900: 1 to 2 ton
Race: 1
details

 Switzerland (SUI)
Hermann de Pourtalès
Hélène de Pourtalès
Bernard de Pourtalès

 France (FRA)
François Vilamitjana
Auguste Albert
Albert Duval
Charles Hugo

 France (FRA)
Jacques Baudrier
Lucien Baudrier
Dubosq
Édouard Mantois

NO Class insigna.png

1900: 1 to 2 ton
Race: 2
details

 Germany (GER)
Paul Wiesner
Georg Naue
Heinrich Peters
Ottokar Weise

 Switzerland (SUI)
Hermann de Pourtalès
Hélène de Pourtalès
Bernard de Pourtalès

 France (FRA)
François Vilamitjana
Auguste Albert
Albert Duval
Charles Hugo

NO Class insigna.png

1900: 2 to 3 ton
Race: 1
details

 Mixed team (ZZX)
William Exshaw
Frédéric Blanchy
Jacques Le Lavasseur

 France (FRA)
Léon Susse
Jacques Doucet
Auguste Godinet
Henri Mialaret

 France (FRA)
Ferdinand Schlatter
de Cottignon
Émile Jean-Fontaine

NO Class insigna.png

1900: 2 to 3 ton
Race: 2
details

 Mixed team (ZZX)
William Exshaw
Frédéric Blanchy
Jacques Le Lavasseur

 France (FRA)
Léon Susse
Jacques Doucet
Auguste Godinet
Henri Mialaret

 France (FRA)
Auguste Donny

NO Class insigna.png

1900: 3 to 10 ton
Race: 1
details

 France (FRA)
Henri Gilardoni

 Netherlands (NED)
Henri Smulders
Chris Hooykaas
Arie van der Velden

 France (FRA)
Maurice Gufflet
A. Dubois
J. Dubois
Robert Gufflet
Charles Guiraist

NO Class insigna.png

1900: 3 to 10 ton
Race: 2
details

 Great Britain (GBR)
Howard Taylor
Edward Hore
Harry Jefferson

 France (FRA)
Maurice Gufflet
A. Dubois
J. Dubois
Robert Gufflet
Charles Guiraist

 United States (USA)
H. MacHenry

NO Class insigna.png

1900: 10 to 20 ton
details

 France (FRA)
Émile Billard
Édouard de Rothschild
Paul Perquer

 France (FRA)
Jean, duc Decazes

 Great Britain (GBR)
Edward Hore

NO Class insigna.png

1900: 20+ ton
details

 Great Britain (GBR)
Cecil Quentin

 Great Britain (GBR)
Selwin Calverley

 United States (USA)
Harry Van Bergen

See also[edit]

References[edit]