A multihull is a ship or boat with more than one hull, whereas a vessel with a single hull is a monohull.
The Tornado is a double handed multihull class recognised as an International Class by the International Sailing Federation. It was used for the Catamaran discipline at the Olympic Games from 1976 to 2008.
An airfoil or aerofoil is the cross-sectional shape of a wing, blade, or sail.
In aeronautics and aeronautical engineering, camber is the asymmetry between the two acting surfaces of an aerofoil, with the top surface of a wing commonly being more convex. An aerofoil that is not cambered is called a symmetric aerofoil. The benefits of cambering were discovered and first utilized by Sir George Cayley in the early 19th century.
The NACA airfoils are airfoil shapes for aircraft wings developed by the National Advisory Committee for Aeronautics (NACA). The shape of the NACA airfoils is described using a series of digits following the word "NACA". The parameters in the numerical code can be entered into equations to precisely generate the cross-section of the airfoil and calculate its properties.
The Route du Rhum is a transatlantic single-handed yacht race, which takes place every 4 years in November. The course is between Saint Malo, Brittany, France and Pointe-à-Pitre, Guadeloupe. The first competition, won by Canadian Michael Birch in his boat Olympus Photo by a margin of 98 seconds over second-placed Michel Malinovsky in Kriter V was held in 1978, and was marked in tragedy by the disappearance of Alain Colas during the crossing.
A wingsail is a variable-camber aerodynamic structure that is fitted to a marine vessel in place of conventional sails. Wingsails are analogous to airplane wings, except that they are designed to provide lift on either side to accommodate being on either tack. Whereas wings adjust camber with flaps, wingsails adjust camber with a flexible or jointed structure. Wingsails are typically mounted on an unstayed spar—often made of carbon fiber for lightness and strength. The geometry of wingsails provides more lift, and a better lift-to-drag ratio, than traditional sails. Wingsails are more complex and expensive than conventional sails.
The Transat Jacques Vabre is a yachting race that follows the historic coffee trading route between France and Brazil. it is named after a French brand of coffee.
The SL 16 is a 4.80 m long fiberglass sailing catamaran. It is designed to be sailed by two people. The SL 16 was selected by ISAF in 2005 for youth world championships.
James Wharram is a multihull pioneer and designer of catamarans.
The Viper is a performance catamaran used for racing it is a one design within the Formula 16 class. It is recognised as a class by the International Sailing Federation.
John Marples is a multihull sailboat designer who collaborates with Jim Brown.
Jim Brown is a multihull sailboat designer who collaborates with John Marples.
The cant of a railway track or camber of a road is the rate of change in elevation (height) between the two rails or edges. This is normally greater where the railway or road is curved; raising the outer rail or the outer edge of the road providing a banked turn, thus allowing vehicles to maneuver through the curve at higher speeds than would otherwise be possible if the surface is flat or level.
A quadrimaran is a four hulled watercraft. Its defining factor is four hulls, placing it within the multihull category. It has one more hull than a trimaran, and one less hull than a pentamaran. Conventional western vessels, by contrast, are monohulls.
The Constant Camber 37 is a trimaran sailboat designed by John Marples in the 1980s.
Constant Camber 26 is a 26 ft (7.9 m) cruising sloop trimaran sailboat designed in the 1970s by John Marples featuring berths for two adults and two children. The constant camber hull is constructed using a single master template to produce each panel, resulting in a design with unchanging curvature, imparting extraordinary strength similar to an eggshell. The panels are laminated using a vacuum bagging technique, as described in Marples' article, "Backyard Vacuum Bagging," written for WoodenBoat Magazine. A unique and appealing feature, aside from its modular construction, is that her cross arms fold up and in, reducing her beam to just under 8 ft (2.4 m), making this trimaran fully trailerable.
Constant Camber 32 is a 32 ft (9.8 m) high performance day-racing / fast cruiser sloop trimaran sailboat designed in the 1970s for protected water and featuring berths for two adults.
