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Kneeboarding (surfsport)
Kneeboarding is a discipline of surfing where the rider paddles on his or her belly into a wave on a ''kneeboard'', then rides the wave face typically on both knees. The typical kneeboard is between in length, with a wide round nose and constructed of Glassfibre over a polyurethane foam core. Kneeboard designers however are known for their wild experimental excess and so most modern materials including various aerospace elements such as Titanium alloys (for fins), carbon fibre and kevlar in epoxy matrices are not unusual. Modern kneeboards may have a rubber pad for the rider's knees, preventing undue wear of the knees, also preventing slipping to help the rider maintain control. Kneeboarders also typically use swimfins and an ankle surfleash. Kneeboarding popularity increased markedly with the release of the surf movie "Crystal Voyager" by the most prominent of kneeboard riders, Californian, George Greenough. The music of Pink Floyd's "Meddle" combined with spectacular slow-motio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surfing
Surfing is a surface water sport in which an individual, a surfer (or two in tandem surfing), uses a board to ride on the forward section, or face, of a moving wave of water, which usually carries the surfer towards the shore. Waves suitable for surfing are primarily found on ocean shores, but can also be found in standing waves in the open ocean, in lakes, in rivers in the form of a tidal bore, or in wave pools. The term ''surfing'' refers to a person riding a wave using a board, regardless of the stance. There are several types of boards. The Moche of Peru would often surf on reed craft, while the native peoples of the Pacific surfed waves on alaia, paipo, and other such water craft. Ancient cultures often surfed on their belly and knees, while the modern-day definition of surfing most often refers to a surfer riding a wave standing on a surfboard; this is also referred to as stand-up surfing. Another prominent form of surfing is body boarding, where a surfer rides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyurethane
Polyurethane (; often abbreviated PUR and PU) refers to a class of polymers composed of organic chemistry, organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene, polyurethane is produced from a wide range of starting materials. This chemical variety produces polyurethanes with different chemical structures leading to many List of polyurethane applications, different applications. These include rigid and flexible foams, varnishes and coatings, adhesives, Potting (electronics), electrical potting compounds, and fibers such as spandex and Polyurethane laminate, PUL. Foams are the largest application accounting for 67% of all polyurethane produced in 2016. A polyurethane is typically produced by reacting an isocyanate with a polyol. Since a polyurethane contains two types of monomers, which polymerize one after the other, they are classed as Copolymer#Alternating copolymers, alternating copolymers. Both the isocy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swimfins
Swimfins, swim fins, diving fins, or flippers are finlike accessories worn on the feet, legs or hands and made from rubber, plastic, carbon fiber or combinations of these materials, to aid movement through the water in water sports activities such as swimming, bodyboarding, bodysurfing, float-tube fishing, kneeboarding, riverboarding, scuba diving, snorkeling, spearfishing, underwater hockey, underwater rugby and various other types of underwater diving. Swimfins help the wearer to move through water more efficiently, as human feet are too small and inappropriately shaped to provide much thrust, especially when the wearer is carrying equipment that increases hydrodynamic drag. Very long fins and monofins used by freedivers as a means of underwater propulsion do not require high-frequency leg movement. This improves efficiency and helps to minimize oxygen consumption. Short, stiff-bladed fins are effective for short bursts of acceleration and maneuvering, and are useful fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Greenough
George Hamilton Perkins Greenough (born November 6, 1941) is an influential surfer known during the 1960s and 1970s for his designs and work in film, board design, fin characteristics, and other creations for the aquatic medium. Greenough's and McTavish's contributions to developing the shortboards resulted in a wave of new advancements in surfing technology and shapes used to design boards. Personal life George Greenough was born in Santa Barbara, California on November 6th 1941 to Hamilton Perkins Greenough and Helen Marie Greenough, née Jensen. George’s father, Hamilton Perkins Greenough, spent part of his career as a shipwright, building wooden picket boats for the U.S. Navy during World War II. Contrary to what many people have written, George Greenough is not a direct descendant of the famous American sculptor, Horatio Greenough. George Greenough and Horatio Greenough are Half Second Cousins Four Times Removed. George underwent open-heart surgery at age ten and became kn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surfing
Surfing is a surface water sport in which an individual, a surfer (or two in tandem surfing), uses a board to ride on the forward section, or face, of a moving wave of water, which usually carries the surfer towards the shore. Waves suitable for surfing are primarily found on ocean shores, but can also be found in standing waves in the open ocean, in lakes, in rivers in the form of a tidal bore, or in wave pools. The term ''surfing'' refers to a person riding a wave using a board, regardless of the stance. There are several types of boards. The Moche of Peru would often surf on reed craft, while the native peoples of the Pacific surfed waves on alaia, paipo, and other such water craft. Ancient cultures often surfed on their belly and knees, while the modern-day definition of surfing most often refers to a surfer riding a wave standing on a surfboard; this is also referred to as stand-up surfing. Another prominent form of surfing is body boarding, where a surfer rides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bodyboard
Bodyboarding is a water sport in which the surfer rides a bodyboard on the crest, face, and curl of a wave which is carrying the surfer towards the shore. Bodyboarding is also referred to as ''Boogieboarding'' due to the invention of the "Boogie Board" by Tom Morey in 1971. The average bodyboard consists of a short, rectangular piece of hydrodynamic foam. Bodyboarders typically use swim fins for additional propulsion and control while riding a breaking wave. Origin Bodyboarding originates from an ancient form of riding waves (surfing) on one's belly. Indigenous Polynesians rode "''alaia''" (pronounced ah-lie-ah) boards either on their belly, knees, or feet (in rare instances). ''Alaia'' boards were generally made from the wood of ''Acacia koa'' and varied in length and shape. They are distinct from the modern stand-up surfboards in that they had no ventral fins. Captain Cook recorded seeing Hawaiian villagers riding such boards when he came to Hawaii in 1778. The boards he witn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
