The 470 (Four-Seventy) is a double-handed

monohull right A monohull is a type of boat having only one hull, unlike multihulled boats which can have two or more individual hulls connected to one another. Fundamental concept Among the earliest hulls were simple logs, but these were generally unstab ...

planing

dinghy A dinghy is a type of small boat, often carried or Towing, towed by a Watercraft, larger vessel for use as a Ship's tender, tender. Utility dinghies are usually rowboats or have an outboard motor. Some are rigged for sailing but they diffe ...

with a

centreboard A centreboard or centerboard (US) is a retractable hull appendage which pivots out of a slot in the hull of a sailboat, known as a ''centreboard trunk'' (UK) or ''centerboard case'' (US). The retractability allows the centreboard to be raised t ...

Bermuda rig Bermuda rig, Bermudian rig, or Marconi rig is a type of sailing rig that uses a triangular sail set abaft (behind) the mast. It is the typical configuration for most modern sailboats. Whilst commonly seen in sloop-rigged vessels, Bermuda rig is ...

, and centre sheeting. Equipped with a

spinnaker A spinnaker is a sail designed specifically for sailing off the wind on courses between a Point of sail#Reaching, reach (wind at 90° to the course) to Point of sail#Running downwind, downwind (course in the same direction as the wind). Spinna ...

trapeze A trapeze is a short horizontal bar hung by ropes, metal straps, or chains, from a ceiling support. It is an aerial apparatus commonly found in circus performances. Trapeze acts may be static, spinning (rigged from a single point), swinging or ...

and a large sail-area-to-weight ratio, it is designed to

plane Plane most often refers to: * Aero- or airplane, a powered, fixed-wing aircraft * Plane (geometry), a flat, 2-dimensional surface * Plane (mathematics), generalizations of a geometrical plane Plane or planes may also refer to: Biology * Plane ...

easily, and good teamwork is necessary to sail it well. The name comes from the boat's length of . The 470 is a

World Sailing World Sailing is the international sports governing body for sailing (sport), sailing; it is recognized by the International Olympic Committee (IOC) and the International Paralympic Committee (IPC). History The creation of the International Yac ...

International Class and has been an

Olympic Olympic or Olympics may refer to Sports Competitions * Olympic Games, international multi-sport event held since 1896 ** Summer Olympic Games ** Winter Olympic Games * Ancient Olympic Games, ancient multi-sport event held in Olympia, Greece bet ...

class since the 1976 games.

History

The 470 was designed by the Frenchman André Cornu in 1963 (four years after the

420 420 may refer to: Science and technology * 420 (number), in mathematics * 420 Bertholda, a main-belt asteroid * 4:2:0, a chroma subsampling layout Cannabis culture * 420 (cannabis culture), informal reference to cannabis use and celebrations ...

, its smaller sister) as a modern fibreglass planing dinghy to appeal to sailors of different sizes and ages. This formula succeeded, and the boat spread around the world. In 1969, the class was given international status and it has been an Olympic class since 1976. In 1988, the first Olympic women's sailing event used the 470.

Sailing

To sail the 470, good physical fitness but not too much physical strength is required. The optimal weight of the combined crew ranges between 110 and 145 kg, making it a suitable boat for men, women and youth teams. Due to various options for sail trimming one can sail the boat well at 1 to 6

Beaufort scale The Beaufort scale ( ) is an empirical measure that relates wind speed to observed conditions at sea or on land. Its full name is the Beaufort wind force scale. It was devised in 1805 by Francis Beaufort a hydrographer in the Royal Navy. It ...

, slightly above by experienced teams. For racing the 470 is a tactically demanding class, since differences in boat speed are small and the boat does not lose much speed during manoeuvers. Good teamwork between helm and crew is essential for successful racing.

Races

World and Continental Championships are organised every year with separate starts for women and men/mixed teams. There is also a World Championship for juniors and a Master World Championship. The 470 is used in regional championships such as the Asian, Mediterranean, and PanAm Games. Entries are limited in important international races, encouraging more competition by requiring qualifying races in most countries. In the World Championships more than 30 countries have been represented. There are 65 member nations in the International Class Association and more than 40,000 boats have been built in 20 countries. The 470 may be raced in a mixed fleet of boats, its performance being adjusted by the Portsmouth Yardstick handicapping scheme. In the

RYA The Royal Yachting Association (RYA) is a United Kingdom Sports governing body, national governing body for sailing (sport), sailing, dinghy sailing, yacht and motor cruising, sail racing, Rigid inflatable boat, RIBs and sportsboats, windsurf ...

-administered scheme, the 470 has a Portsmouth number of 973. In the

US Sailing The United States Sailing Association (US Sailing) is the national governing body for sailing in the United States. Founded in 1897 and headquartered in Bristol, Rhode Island, US Sailing is a 501(c) (3) non-profit organization. US Sailing offe ...

-administered scheme, it has a D-PN of 86.3.

Construction

The 470 is a strict one-design class, and its builder must be approved a Licensed Builder by World Sailing. The class design may evolve, but its intent is to use proven, economical, and environmentally sound materials, currently

fibreglass Fiberglass (American English) or fibreglass ( Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass c ...

with integral buoyancy tanks for the hull. The 470 dinghy is long with a mast. Its weight without sails is .

Events

Olympics

At the

Olympic Games The modern Olympic Games (Olympics; ) are the world's preeminent international Olympic sports, sporting events. They feature summer and winter sports competitions in which thousands of athletes from around the world participate in a Multi-s ...

, the 470 Class was initially has been used at every games since 1976 games with various gender requirement. It remain on the program were it will be the mandatory mixed gender event at

2028 Olympic Games The 2028 Summer Olympics, officially the Games of the XXXIV Olympiad and commonly known as Los Angeles 2028 or LA 28, is an upcoming international multi-sport event scheduled to take place July 14–30, 2028, in the United States. Los Angeles ...

Open Gender

Male

Female

Mixed

470 World Championships

470 Junior World Championships

References

External links

Official class website

International Sailing Federations 470 Microsite
{{Authority control Dinghies 1960s sailboat type designs Sailboat type designs by French designers