# 2.4 Metre

(Redirected from 2.4 Metre (keelboat))
Development Class symbol International 2.4mR Development class 1 1 m (3 ft 3.370 in) (Mark III) 260 kg (570 lb) 4.16 m (13 ft 8 in) (Mark III) 0.805 m (2 ft 7.7 in) 4.65 m (15.3 ft) 7.5 m2 (81 sq ft) (Mark III) 1250[1]

The International 2.4mR is a one-person keelboat. The class is a development class governed by the 2.4mR rule. The rule is controlled by World Sailing (ISAF) since it is one of few classes designated as an International class. The class rule is closely related to the 12mR rule that was used in the America's Cup and the shape often resembles the larger sister.

While there is a small but active group of amateur designer/builders around the world, around 90% of boats are the commercially produced Norlin Mark III designed by yacht designer Peter Norlin of Sweden. Recently, new designs have come into production, such as the Stradivari III and the Proton.

The boat is primarily used for racing and the class holds highly competitive national events in many countries. World and European championships (only when the World Championship is not in Europe) are attracting around 100 boats every year. In some countries it features mainly as a class for sailors with a disability.

The 2.4mR is ideal for adapted sailing since the sailor does not move in the boat, and everything is adjustable from right in front of the sailor. Both hand-steering and foot-steering are possible. The boat's ability in integrated sailing has been proven on the result lists of several World Championships. In 2002 and 2005 there were handicapped World Champions. The boat is sailed without a spinnaker, but with a whisker-pole for the jib.

## History

After the 1980 America's Cup, people in the Newport, RI area started sailing boats called Mini-12s named for the 12-Metre yachts used in the America's Cup. As the class developed, word of it spread to Sweden, home of yacht designer Peter Norlin. Norlin tweaked the design, and along with other naval architects he created the 2.4 meter yacht class. Although the 2.4mR is a construction class, Peter Norlin is in practice the totally dominating designer, and the class is therefore often mistaken as a one design class. In addition to all the sailing aspects of the boat, Norlin has worked the design to incorporate features for the physically disabled to use the boat.

## One-design

In recent years an attempts have been made to develop a one design class based on the Norlin III. This is primarily because of the need for competition within the paralympics for racing to be about the sailor and not a technical development race. This led to the introduction of (Appendix K to the Class rules) and now a group is working on a set of stand alone One-design rules. This is still at the early stages but it is likely a new one design class is formed alongside the development class.

## Rating formula

As an open class rather than a one-design, all boat designs must meet the following formula.[2]

${\displaystyle R={\dfrac {L+2d-F+{\sqrt {S}}}{2.37}}}$

Where (all measurements in mm)

• L = the "corrected" length of the hull (see rule D.6.3)
• d = the midship girth difference (see rule D.6.4)
• F = the average freeboard height (see rule D.6.5)
• S = the total rated area of the mainsail and jib combined.

## Events

### World Championships

Year
Gold Silver Bronze
1993 Kokkola  Patrik Forsgren (SWE)  Peter Norlin (SWE)  Ralf Casen (FIN)
1994 Rutland Water  Bo Hedensjö (SWE)  Carl-Gustaf Fresk (SWE)
1995 Aahus  Carl-Gustaf Fresk (SWE)  Marko Dahlberg (FIN)
1996 Cannes  Peter Norlin (SWE)  Bo Hedensjö (SWE)  Imma Björndahl (FIN)
1997  Marko Dahlberg (FIN)  Peter Norlin (SWE)  Patrik Forsgren (SWE)
1998 Tampere  Rikard Bjurström (FIN)
1999  Tom Björndahl (FIN)  Marko Dahlberg (FIN)  Peter Norlin (SWE)
2000 Melbourne  Stellan Berlin (SWE)  Rikard Bjurström (FIN)  Peter Norlin (SWE)
2001 Tønsberg  Heiko Kroeger (GER)  Stellan Berlin (SWE)  Peter Norlin (SWE)
2002 Miami  Stellan Berlin (SWE)  Hans Meyers (USA)  Tom Brown (USA)
2003  Marko Dahlberg (FIN)  Damien Seguin (FRA)  Stellan Berlin (SWE)
2004  Stellan Berlin (SWE)  Ulf Arvidsson (SWE)
2005  Nick Scandone (USA)  Stellan Berlin (SWE)  Helena Lucas (GBR)
2006 Helsinki  Stellan Berlin (SWE)  Thierry Schmitter (NED)  Harri Malm (FIN)
2007 Kolding  Lennart Heselius (SWE)  Stellan Berlin (SWE)  Ulf Arvidsson (SWE)
2008 Gran Canaria  Stellan Berlin (SWE)  Damien Seguin (FRA)  Hans Asklund (SWE)
2009 Fort Myers  John Ruf (USA)  Carl Horrocks (USA)  Paul Tingley (CAN)
2010 Hoorn  Paul Tingley (CAN)  Stellan Berlin (SWE)  Hans Asklund (SWE)
2011 Ålesund  Stellan Berlin (SWE)  Marko Dahlberg (FIN)  Rikard Bjurström (FIN)
Peter Andersson (SWE)  Stellan Berlin (SWE)  Megan Pascoe (GBR)
2013 Poole  Stellan Berlin (SWE)  Helena Lucas (GBR)  Megan Pascoe (GBR)
2014 Toronto  Stellan Berlin (SWE)  Bjørnar Erikstad (NOR)  Helena Lucas (GBR)
2015 Rauma  Stellan Berlin (SWE)  Bjørnar Erikstad (NOR)  Heiko Kröger (GER)
2016 Hobart  Megan Pascoe (GBR)  Matt Bugg (AUS)  Paul Francis (NZL)

### Para World Sailing Championships

The 2.4 metre has been used a number of times as equipment for the One-Person Technical Disabled displine which holds an annual World Championships.

Year
Gold Silver Bronze
2017 Kiel[3]  Heiko Kröger (GER)  Matthew Bugg (AUS)  Damien Seguin (FRA)

### Paralympics

Since 2000 the 2.4 Metre has been the official single-crew class boat for sailing at the Summer Paralympics although it has been used in a more one design form utilising the Norlin Mk3 design.

## References

1. ^ "Portsmouth Number List 2012". Royal Yachting Association. Retrieved 31 July 2012.
2. ^ Marie. "International 2.4 mR Class Rules (2006)" (PDF). Inter24metre.org. Archived from the original (PDF) on 2009-08-22. Retrieved 2009-08-16.
3. ^ "Kieler Woche 2017 manage2sail". www.manage2sail.com.