| Design: | Development class |
| Crew: | 3 |
| Loa: | 6.5m (21.3feet) |
| Lwl: | minimum 5.2m (17.1feet) |
| Draft: | 1m (03feet) |
| Hull: | minimum 600kg (1,300lb) |
| Mainsailandjib: | maximum 30m2 |
| Updated: | 19-APR-2010 |
| Olympic: | former |
The International Six point Five 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 the French rule called Jauge chemin de fer.
The 6.5m was used as an Olympic Class during the 1920 Olympics.
The first formula of the 6.5m, was worked out by Louis Dyèvre, member of the Société des régates de Vannes, naval architect and member of the French delegation to the congress of London of 1906, is inspired by the formula of the New York Yacht Club in 1903:
| Lf ⋅ \sqrt{S | |
Lf represents the waterline length (LWL), S the measured sail area, D displacement.
The principal restrictions are:
| - | 1920 Antwerp | Netherlands (NED) Joop Carp Berend Carp Petrus Wernink | France (FRA) Albert Weil Robert Monier Félix Picon | No further competitors |