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Hot Saw
Hot Saw is an event or discipline in logging sports. It is also used to describe the type of saw used in the event, a high-powered chainsaw. Overview This event is often the crowd's favourite, and certainly the loudest. Compared to other logging sports using an axe or manual saw, this event uses a motor-powered chainsaw. However, to stick to the traditional ethos, the chainsaw must be either completely homemade or self-modified in some way, within certain restrictions; one required modification is for the competitor to add a super engine. The chainsaws are large and methanol-run. The saws used by top competitors are typically snowmobile or watercraft engines cut in half, and are far heavier than regular chainsaws. The event has been described as " re of an engineering challenge than a day-of competition" because of this. In it, competitors will cut cookies — circular disks from logs — of certain specifications as quickly as they can. Competitors view it as the hardest event, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chainsaw
A chainsaw (or chain saw) is a portable gasoline-, electric-, or battery-powered saw that cuts with a set of teeth attached to a rotating chain driven along a guide bar. It is used in activities such as tree felling, limbing, Log bucking, bucking, pruning, cutting firebreaks in wildland fire suppression, and harvesting of Wood fuel#Firewood, firewood. Chainsaws with specially designed bar-and-chain combinations have been developed as tools for use in Chainsaw carving, chainsaw art and chainsaw mills. Specialized chainsaws are used for cutting concrete during construction developments. Chainsaws are sometimes used for cutting ice; for example, ice sculpture and winter swimming in Finland. History In surgery The origin of chain saws in surgery is debated. A "flexible saw", consisting of a fine serrated link chain held between two wooden handles, was pioneered in the late 18th century (c. 1783–1785) by two Scottish doctors, John Aitken and James Jeffray, for symphysiotomy and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferry Svan 01
A ferry is a ship, watercraft or amphibious vehicle used to carry passengers, and sometimes vehicles and cargo, across a body of water. A passenger ferry with many stops, such as in Venice, Italy, is sometimes called a water bus or water taxi. Ferries form a part of the public transport systems of many waterside cities and islands, allowing direct transit between points at a capital cost much lower than bridges or tunnels. Ship connections of much larger distances (such as over long distances in water bodies like the Mediterranean Sea) may also be called ferry services, and many carry vehicles. History In ancient times The profession of the ferryman is embodied in Greek mythology in Charon, the boatman who transported souls across the River Styx to the Underworld. Speculation that a pair of oxen propelled a ship having a water wheel can be found in 4th century Roman literature "''Anonymus De Rebus Bellicis''". Though impractical, there is no reason why it could not work ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stradivarius
A Stradivarius is one of the violins, violas, cellos and other string instruments built by members of the Italian family Stradivari, particularly Antonio Stradivari (Latin: Antonius Stradivarius), during the 17th and 18th centuries. They are considered some of the finest instruments ever made, and are extremely valuable collector's items. According to their reputation, the quality of their sound has defied attempts to explain or equal it, though this belief is disputed. The many blind experiments from 1817 to as recently as 2014 have found no difference in sound between Stradivari's violins and high-quality violins in comparable style of other makers and periods, nor has acoustic analysis. The fame of Stradivarius instruments is widespread, appearing in numerous works of fiction. Construction Stradivari made his instruments using an inner form, unlike the French copyists, such as Vuillaume, who employed an outer form. It is clear from the number of forms throughout his c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stihl
Stihl (, ) is a German manufacturer of chainsaws and other handheld power equipment including trimmers and blowers. Their headquarters are in Waiblingen, Baden-Württemberg, near Stuttgart, Germany. Stihl was founded in 1926 by Andreas Stihl, an important innovator in early chain saw production. Stihl claims to be the world's best-selling brand of chain saws, and the only chain saw manufacturer to make its own saw chains and guide bars. Andreas Stihl AG is a privately held company owned by the descendants of Andreas Stihl. Stihl operates the Stihl Timbersports Series. Company history Andreas Stihl designed and hand built his first chainsaw in 1926. The saw was electrically powered, and weighed about . Stihl grew slowly initially, as the chainsaws came to the market about the same time as the Great Depression; with manpower cheap, and old two-man saws proven, there was no need for power saws. In 1930, Stihl created the first ever chainsaw that could be operated by only one pers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaps
Chaps ( or ) are sturdy coverings for the legs consisting of leggings and a belt. They are buckled on over trousers with the chaps' integrated belt, but unlike trousers, they have no seat (the term "assless chaps" is a Tautology (language), tautology) and are not joined at the crotch. They are designed to provide protection for the legs and are usually made of leather or a leather-like material. Their name is a shortened version of the Spanish word ''chaparajos''. ''Chaparajos'' were named after the chaparral (thick, thorny, low brush) from which they were designed to protect the legs while riding on horseback. Like much of western American horse culture, the origin of ''chaparajos'' was in the south of Spain, from which it then passed on to the part of New Spain that later became Mexico, and has been assimilated into cowboy culture of the American west. They are a protective garment to be used when riding a horse through brushy terrain. In the modern world, they are worn for both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chainsaw Safety Clothing
Safety practices generally recommend that chainsaw users wear protective clothing, also known as personal protective equipment or PPE, while operating chainsaws. There is general agreement worldwide on what clothing is suitable, but local jurisdictions have specific rules and recommendations. Clothing Helmet The helmet offers some protection for the user's head against impact by the cutter bar of the chainsaw should a 'kickback' occur. Kickback is when the running chainsaw jumps up unexpectedly out of the cut, thus endangering the saw operator. Helmet protection can only be successful if the chain brake has been operated to stop the saw chain, since a chain running at full speed can easily cut into the helmet. The helmet, and its eye protection guard, also protect against impacts from small falling or flying objects, such as dead twigs and branches from a tree being felled. Exposure to the sun causes the plastic of the helmet to weaken over time, so it is recommended that a h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chainmail
Chain mail (properly called mail or maille but usually called chain mail or chainmail) is a type of armour consisting of small metal rings linked together in a pattern to form a mesh. It was in common military use between the 3rd century BC and the 16th century AD in Europe, and longer in Asia and North Africa. A coat of this armour is often called a hauberk, and sometimes a byrnie. History The earliest examples of surviving mail were found in the Carpathian Basin at a burial in Horný Jatov, Slovakia dated at 3rd century BC, and in a chieftain's burial located in Ciumești, Romania. Its invention is commonly credited to the Celts, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stihl Timbersports
The Stihl Timbersports Series is a series of woodsman or wood chopping competitions where the athletes compete in the use of axes and saws in manners typical for lumberjacks. It was founded in 1985, and currently includes six different disciplines, with both professional and collegiate divisions. The terms 'timbersports' and 'timber sports' are trademarked by Stihl Inc. History Stihl Timbersports began in 1985, and the earliest broadcasts were made from a field in Wisconsin, United States, using a single camera on a forklift. At this time, there was no overall Series championship. Instead, awards were given for performances in individual events on venues around the country. Stihl, however, had a vision of a series that would bring the best athletes together and let them compete in several events and thus determine who was the best overall lumberjack. With the help of Granite State Lumberjack Shows, the Series evolved and has become a very prestigious competition. Athletes from all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horsepower
Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the mechanical horsepower (or imperial horsepower), which is about 745.7 watts, and the metric horsepower, which is approximately 735.5 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to include the output power of other types of piston engines, as well as turbines, electric motors and other machinery. The definition of the unit varied among geographical regions. Most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on 1 January 2010, the use of horsepower in the EU is permitted only as a supplementary unit. History The development of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-cylinder Engine
A single-cylinder engine, sometimes called a thumper, is a piston engine with one cylinder. This engine is often used for motorcycles, motor scooters, go-karts, all-terrain vehicles, radio-controlled vehicles, portable tools and garden machinery (such as lawnmowers, cultivators, and string trimmers). Single-cylinder engines are made both as 4-strokes and 2-strokes. Characteristics Compared with multi-cylinder engines, single-cylinder engines are usually simpler and compact. Due to the greater potential for airflow around all sides of the cylinder, air cooling is often more effective for single cylinder engines than multi-cylinder engines. This reduces the weight and complexity of air-cooled single-cylinder engines, compared with liquid-cooled engines. Drawbacks of single-cylinder engines include a more pulsating power delivery through each cycle and higher levels of vibration. The uneven power delivery means that often a single-cylinder engine requires a heavier flywheel than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuned Exhaust
In an internal combustion engine, the geometry of the exhaust system can be optimised ("tuned") to maximise the power output of the engine. Tuned exhausts are designed so that reflected pressure waves arrive at the exhaust port at a particular time in the combustion cycle. Two-stroke engines Expansion chambers In two-stroke engines where the exhaust port is opened by being uncovered by the piston (rather than by a separate valve), a tuned exhaust system usually consists of an expansion chamber. The expansion chamber is designed to produce a negative pressure wave to assist in filling the cylinder with the next intake charge, and then to produce a positive pressure wave which reduces the amount of fresh intake charge that escapes through the exhaust port (''port blocking''). Uniflow scavenging An alternate design of two-stroke engines is where the exhaust port is opened/closed using a poppet valve and the intake port is piston-controlled (opened by being uncovered by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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