2.4mR NMKIII One Design
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One-Design Class Type: Keelboat
Was this boat built to be sailed by youth or adults? Both
Approximately how many class members do you have? 20
Photo Credit:Fran Bernstein
Photo Credit: Fran Bernstein
About 2.4mR NMKIII One Design
The 2.4 meter is perhaps the best, most fun single handed boat you will ever sail. It can be as tactical, technical, and fast as you want it to be. In many ways, it is like sailing your own small 12 meter. Anyone who has sailed a 2.4 meter will tell you that they are exciting to sail, very competitive to race, and offer loads of FUN… The class includes former Americas Cup sailors, one-design champions, disabled sailors, cruising class sailors, and people of all ages and genders who love to sail. The best thing about the 2.4 meter is that each sailor competes on an equal level of sailing ability – not agility. Some have called this boat “the great equalizer” because it really levels the playing field for sailors of all ages and abilities.
Boats Produced: 800+
Class boat builder(s):
KAPH Group/Charger Sailing Edge Sailing
Approximately how many boats are in the USA/North America? 60
Where is your One-Design class typically sailed in the USA? List regions of the country:
South Florida North East US
Does this class have a spinnaker or gennaker? No
How many people sail as a crew including the helm? 1
Ideal combined weight of range of crew: any
Boat Designed in 1990
Length (feet/inches): 14
Beam: 33″
Weight of rigged boat without sails: 600
Draft: 3’6″
Mast Height: 16′
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The 2.4 Metre originated from Stockholm 1983 by local yacht designers who used the "R Metre" rule to create a single-handed keelboat, 2.4mR. The helm sits down in the boat facing forward with all the controls within arms reach, the sailing is not physically demanding and racing is done in one open class with men, women, young and old, abled and disabled sailors racing together.
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US 2.4 Meter
The International 2.4mR Racing Sailboat
US 2.4mR Class Info
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Canadian 2.4mR Sailing Association
2.4mR Sailboat Class
The 2.4 Metre originated from Stockholm in 1983 by local yacht designers who used the “R Metre” rule to create a single-handed keelboat the 2.4mR. It is a thoroughbred racer that has the complexity of a sophisticated keelboat, without the high costs, and the fingertip feeling of a dinghy. As a sister to the bigger 6m, 8m and 12m yachts, she possesses the typical powerful Metre boat sailing style.
Level Playing Field
Since the helmsperson sits down in the boat facing forward with all the trim controls within arms reach, the sailing is not physically demanding and racing is done in one open class with men, women, young and old, able and disabled sailors racing together. Because the crew weight is always close to its centre of gravity, the 2.4mR is insensitive to differences in size of the helmsperson. Instead, 2.4mR racing focuses on sophisticated sail trim, tactics and strategy.
The 2.4mR soon became a popular class for its unique qualities and has now spread world wide. In 1992, the 2.4 Metre Class attained “International Status”, and official World Championships have been held annually since then, attracting 60-100 boats. Since the 2.4mR is so well suited for sailors with physical disabilities, it has been selected as the single-handed class at the Paralympics in Sydney 2000 where sailing for the first time was a full medal sport. The biggest fleets are found in the Scandinavian countries, Italy, England and Australia.
Construction Class
Because the 2.4 Metre has been a construction class, the boats have developed much in the early years, and are today superior in performance and safety compared to the earlier “Mini 12” versions. Being a construction class, there are different designs built by various boat builders. Some designs are built by “hobby-builders” and they contribute to the healthy development of the Class. However, the Norlin Mark III-design has been dominating the result lists since 1991 and today 90% of the active boats are Norlin Mark III’s. There are production boat builders in Finland, USA and Australia that manufacture the Norlin Mark III 2.4mR and in Sweden where the Stradivari 2.4m and Eide 2.4m are built.
The Class Association regularly works on the Class Rules to detect and avoid any loop holes in the rules and prevent “break through” designs that would make existing designs obsolete. While the “R Metre” rule has been around for almost 100 years and has undergone extensive elaboration, especially during the America’s Cup 12 Metre period, the 2.4 Metre Class Rule is kept very “strict”. For example, it does not allow wing keels or exotic materials. However, the Class Rule does allow variations in equipment to level the playing field between physical differences of strength, size and abilities of the sailors, yet keeping the equipment at reasonable cost at the same time.
Match Racing
The combination of keel boat and dinghy qualities makes the 2.4mR the perfect boat for single-handed match racing. This format is a very demanding and effective way to test and improve one’s tactical skills in both match and fleet racing. Furthermore, the 2.4mR is ideal to race on short courses close to shore. Spectacular match racing regattas with a race announcer is relatively easy and inexpensive to put together. But most importantly, 2.4mR sailing is all up to the helmsperson. There is no need for an elite level crew that is otherwise necessary if one wants to be competitive in match racing.
Class Associations
International
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- CLASSIFIEDS
- NEWSLETTERS
- SUBMIT NEWS
The 2.4 Metre originated from Stockholm 1983 by local yacht designers who used the "R Metre" rule to create a single-handed keelboat, 2.4mR. The helm sits down in the boat facing forward with all the controls within arms reach, the sailing is not physically demanding and racing is done in one open class with men, women, young and old, abled and disabled sailors racing together.
| Pos | Crew | Mast | Boom | Spi Pole | Main | Jib | Spinnaker | Rudder | Board | Hull |
|---|
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- Sailboat Guide
Norlin Mark III (2.4 Meter)
Norlin Mark III (2.4 Meter) is a 13 ′ 8 ″ / 4.2 m monohull sailboat designed by Peter Norlin and built by Gavia Yachts starting in 1990.
Rig and Sails
Auxilary power, accomodations, calculations.
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL
Sail Area / Displacement Ratio
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64) 2/3
- SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D : Displacement in pounds.
Ballast / Displacement Ratio
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
Displacement / Length Ratio
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
Comfort Ratio
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )
- D: Displacement of the boat in pounds
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
Capsize Screening Formula
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
The NORLIN MARK III is the most popular 2.4 METER design.
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US 2.4 Meter Racing Sailboat. The 2.4 meter is 13 feet 8 inches long. Designed for competitive sailing, it is easily handled, trailered, launched and stored. The 2.4 meter is perhaps the best, most fun single handed boat you will ever sail. It can be as tactical, technical, and fast as you want it to be.
A ONE-PERSON KEELBOAT FOR ALL The 2.4mR is a one-person sailboat that offers even the most accomplished competitive sailors a unique opportunity to test their sailing skills. As complex and challenging as an Etchells or a Dragon without the high maintenance costs or the need for crew, it can be use
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The 2.4mR is a one-person keelboat that offers even the most accomplished competitive sailors a unique opportunity to test their sailing skills. As complex and challenging as an Etchells or a Dragon without the high maintenance costs or the need for crew, it can be used as a platform to further develop team and fleet racing. resembles that of ...
The 2.4 meter is 13 feet 8 inches long. It is easily handled, trailered, launched and stored. It is designed for competitive sailing, falling under broad technical and class administration of the International 2.4mR Class Association and the International Sailing Federation (ISAF). The class has been recognized by the ISAF (formerly the IYRU ...
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About 2.4mR NMKIII One Design. The 2.4 meter is perhaps the best, most fun single handed boat you will ever sail. It can be as tactical, technical, and fast as you want it to be. In many ways, it is like sailing your own small 12 meter. Anyone who has sailed a 2.4 meter will tell you that they are exciting to sail, very competitive to race, and ...
2.4m. The 2.4 Metre originated from Stockholm 1983 by local yacht designers who used the "R Metre" rule to create a single-handed keelboat, 2.4mR. The helm sits down in the boat facing forward with all the controls within arms reach, the sailing is not physically demanding and racing is done in one open class with men, women, young and old ...
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Matt Koblenzar wins 2024 US Sailing Disabled Singlehanded championship; 2024 World Championship Preview; 2024 Sandy Bay Invitational Wrap Up; 2.4 Meter Open House at Sandy Bay Yacht Club; Categories. News & Announcements (96) Photos (4) Regatta Results (26) Regattas (10)
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The Boat. The 2.4 Metre originated from Stockholm in 1983 by local yacht designers who used the "R Metre" rule to create a single-handed keelboat the 2.4mR. It is a thoroughbred racer that has the complexity of a sophisticated keelboat, without the high costs, and the fingertip feeling of a dinghy. As a sister to the bigger 6m, 8m and 12m ...
2.4m. The 2.4 Metre originated from Stockholm 1983 by local yacht designers who used the "R Metre" rule to create a single-handed keelboat, 2.4mR. The helm sits down in the boat facing forward with all the controls within arms reach, the sailing is not physically demanding and racing is done in one open class with men, women, young and old ...
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Kelsall Sailing Performance (KSP): Another measure of relative speed potential of a boat. It takes into consideration "reported" sail area, displacement and length at waterline. The higher the number the faster speed prediction for the boat. A cat with a number 0.6 is likely to sail 6kts in 10kts wind, a cat with a number of 0.7 is likely ...
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