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Skateboard Truck
A skateboard is a type of sports equipment used for skateboarding. They are usually made of a specially designed 7-8 ply maple plywood deck and polyurethane wheels attached to the underside by a pair of skateboarding trucks. The skateboarder moves by pushing with one foot while the other foot remains balanced on the board, or by pumping one's legs in structures such as a bowl or half pipe. A skateboard can also be used by simply standing on the deck while on a downward slope and allowing gravity to propel the board and rider. If the rider's leading foot is their right foot, they are said to ride "goofy". The two main types of skateboards are the longboard and the shortboard. The shape of the board is also important: the skateboard must be concaved to perform tricks. History Skateboarding started in California in the 1950s. The first skateboards were made from roller skates attached to a board. Skateboarding gained in popularity because of surfing: in fact, skateboarding w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skateboarder In The Air
Skateboarding is an action sport originating in the United States that involves riding and performing tricks using a skateboard, as well as a recreational activity, an art form, an entertainment industry job, and a method of transportation. Skateboarding has been shaped and influenced by many skateboarders throughout the years. A 2009 report found that the skateboarding market is worth an estimated $4.8 billion in annual revenue, with 11.08 million active skateboarders in the world. In 2016, it was announced that skateboarding would be represented at the 2020 Summer Olympics in Tokyo, for both male and female teams. Since the 1970s, skateparks have been constructed specifically for use by skateboarders, freestyle BMXers, aggressive skaters, and more recently, scooters. However, skateboarding has become controversial in areas in which the activity, although illegal, has damaged curbs, stoneworks, steps, benches, plazas, and parks. History 1940s–1960s The first skateboard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silicon Nitride
Silicon nitride is a chemical compound of the elements silicon and nitrogen. is the most thermodynamically stable and commercially important of the silicon nitrides, and the term "silicon nitride" commonly refers to this specific composition. It is a white, high-melting-point solid that is relatively chemically inert, being attacked by dilute HF and hot . It is very hard (8.5 on the mohs scale). It has a high thermal stability with strong optical nonlinearities for all-optical applications. Production Silicon nitride is prepared by heating powdered silicon between 1300 °C and 1400 °C in a nitrogen atmosphere: :3 Si + 2 → The silicon sample weight increases progressively due to the chemical combination of silicon and nitrogen. Without an iron catalyst, the reaction is complete after several hours (~7), when no further weight increase due to nitrogen absorption (per gram of silicon) is detected. In addition to , several other silicon nitride phases (with chemica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wakeboard
Wakeboarding is a water sport in which the rider, standing on a wakeboard (a board with foot bindings), is towed behind a motorboat across its wake and especially up off the crest in order to perform aerial maneuvers. A hallmark of wakeboarding is the attempted performance of midair tricks. Wakeboarding was developed from a combination of water skiing, snowboarding and surfing techniques. The rider is usually towed by a rope behind a boat, but can also be towed by cable systems and winches, and be pulled by other motorized vehicles like personal watercraft, cars, trucks, and all-terrain vehicles. The gear and wakeboard boat used are often personalized to each rider's liking. Though natural watercourses such as rivers, lakes and areas of open water are generally used in wakeboarding, it is possible to wakeboard in unconventional locations, such as flooded roads and car parks, using a car as the towing vehicle. Wakeboarding is done for pleasure and competition, ranging from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surfboard
A surfboard is a narrow plank used in surfing. Surfboards are relatively light, but are strong enough to support an individual standing on them while riding an ocean wave. They were invented in ancient Hawaii, where they were known as ''papa he'e nalu'' in the Hawaiian language, and were usually made of wood from local trees, such as Acacia koa, koa. They were often over in length and extremely heavy. Major advances over the years include the addition of one or more fins (skegs) on the bottom rear of the board to improve directional stability, and numerous improvements in materials and shape. Modern surfboards are made of polyurethane or polystyrene foam covered with layers of fiberglass cloth, and polyester or epoxy resin. The result is a light and strong surfboard that is buoyant and maneuverable. Recent developments in surfboard technology have included the use of carbon fiber and kevlar composites, as well as experimentation in biodegradable and ecologically friendly resins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snowboard
Snowboards are boards where the user places both feet, usually secured, to the same board. The board itself is wider than most skis, with the ability to glide on snow."snowboarding." Dictionary.com Unabridged (v 1.1). Random House, Inc. 17 Mar. 2009. . Snowboards widths are between 6 and 12 inches or 15 to 30 centimeters. Snowboards are differentiated from monoskis by the stance of the user. In monoskiing, the user stands with feet inline with direction of travel (facing tip of monoski/downhill) (parallel to long axis of board), whereas in snowboarding, users stand with feet transverse (more or less) to the longitude of the board. Users of such equipment may be referred to as ''snowboarder''s. ''Commercial snowboards'' generally require extra equipment such as bindings and special boots which help secure both feet of a snowboarder, who generally ride in an upright position. These types of boards are commonly used by people at ski hills, mountains, backcountry, or resorts for l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slalomboard
A slalomboard is a skateboard, usually 60–80 cm long, with great manoeuvring capability. It enables the rider to brake or propel the board without touching the ground. This is achieved by correct body weight placement, together with short, intense swings (sometimes referred to as " pumping"). Slalomboards are typically used in slalom skateboard racing, where riders race through a slalom course set with plastic cones. Slalomboards are practical as a means of city transportation since the board can easily be taken onto public transport and ridden on sidewalks. Skateboards {{Skateboarding-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-balancing Scooter
A self-balancing scooter (also hoverboard, self-balancing board, segway or electric scooter board) is a self-balancing personal transporter consisting of two motorized wheels connected to a pair of articulated pads on which the rider places their feet. The rider controls the speed by leaning forward or backward, and direction of travel by twisting the pads. Invented in its current form in early 2013, the device is the subject of complex patent disputes. Volume manufacture started in China in 2014 and early units were prone to catching fire due to an overheating battery which resulted in product recalls in 2016, including over 500,000 units sold in the United States by eight manufacturers. History Shane Chen, an American businessman and founder of Inventist filed a patent for a device of this type in February 2013 and launched a Kickstarter fund-raising campaign in May 2013. The devices' increasing popularity in Western countries has been attributed, initially, to endorsemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoverboard
A hoverboard (or hover board) is a levitating board used for personal transportation, first described in science-fiction, and made famous by the appearance of a skateboard-like hoverboard in the film '' Back to the Future Part II''. Many attempts have been made to invent a functioning hoverboard. In fiction Hoverboards were first described by author M. K. Joseph in a 1967 science fiction novel. In 1984, a hoverboard appeared in the shoot 'em up arcade video game ''SWAT'', developed by Coreland and distributed by Sega in Japan and Bally Midway in North America. The hoverboard was popularized by the '' Back to the Future'' film franchise, with its appearance in '' Back to the Future Part II'' (1989). During the 1990s there were rumors, fueled by the film's director Robert Zemeckis, that hoverboards were in fact real, but not marketed because they were deemed too dangerous by parents' groups. These rumors have been conclusively debunked. Hoverboards have appeared in various ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Skateboard
An electric skateboard is a personal transporter based on a skateboard. The speed is usually controlled by a wireless hand-held throttle remote or rider body weight-shifting between front of the board for forward motion and rear for braking. As for the direction of travel to the right or left, it is adjusted by tilting the board to one side or the other. The classification of electric skateboards (e.g. whether they qualify as a 'vehicle') and legality of their use on roads or pavements varies between countries. History Early incarnations The MotoBoard, which was gasoline-powered, was released in the summer of 1975 but was banned in California in 1997 due to noise and pollution. Modern electric devices Louie Finkle of Seal Beach, California is often cited as an originator of the modern electric skateboard, offering his first wireless electric skateboard in 1997 and a patent filed in April 1999, however it was not until the 2004–2006 that electric motors and batteries were avai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caster Board
A caster board, vigorboard or waveboard is a two-wheeled, human-powered land vehicle. Other names are J-board and RipStik (sometimes written ripstick or rip stick), both of which are derived from commercial brands. A caster board has two narrow platforms known as "decks" that are joined by a torsion bar, which consists of a metal beam, usually coated by rubber, that houses a strong spring. One polyurethane wheel is mounted to each deck with a caster so that each wheel can steer independently, and each caster has a steering axis that is tilted about 30° back from the vertical. Movement The motion requires that the board be twisted back and forth so as to move either just the back foot or both the front and back feet side to side, essentially pushing the board forward at the outside of the movement, before the foot is brought back in the other direction. In principle, the act is similar to what is required to propel one who is riding inline skates forward, as opposed to how sk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skate Shop
320px, Ridin' High Skate Shop in Burlington, Vermont A skate shop or skateshop is a store that sells skateboards and skateboarding apparel. When financially possible, skate shops sponsor local riders and promote skateboarding locally through skate videos and demonstrations, referred to as "demos". History In 1962, the surf shop "Val-Surf" in Hollywood became the first skate shop when they carried the first self-produced skateboards. These boards, sold complete, featured a surfboard shape and roller skate trucks. Professional skateboarder Jeff Grosso referred to skate shops as " Jedi temples for skateboarding". Notable skate shops * Rip City Skates - Santa Monica, CA * ZJ Boarding House - Santa Monica, CA * 510 Skateboarding - Berkeley, CA * 66 6th - San Francisco, CA *Cal Skate Skateboards - Portland, OR *Labor Skateshop - New York City, NY *KCDC Skateshop - Brooklyn, NY *Skate Brooklyn - Brooklyn, NY * Supreme - New York City, NY *Uncle Funkys Boards - New York City, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steering
Steering is a system of components, linkages, and other parts that allows a driver to control the direction of the vehicle. Introduction The most conventional steering arrangement allows a driver to turn the front wheels of a vehicle using a hand–operated steering wheel positioned in front of the driver. The steering wheel is attached to a steering column, which is linked to rods, pivots and gears that allow the driver to change the direction of the front wheels. Other arrangements are sometimes found on different types of vehicles; for example, a tiller or rear-wheel steering. Tracked vehicles such as bulldozers and tanks usually employ differential steering, where the tracks are made to move at different speeds or even in opposite directions, using clutches and brakes, to achieve a change of direction. Land vehicle steering Basic geometry Ackerman Steering Linkage.gif, Ackermann steering Bell-Crank Steering Linkage.gif, Bell-crank steering Rack-And-Pinion Steering Link ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
