What is a curling stone made out of

what is a curling stone made out of

Every Curling Stone Ever Used In The Olympics Has Come From One Tiny Island

Feb 22,  · The stones, also known as rocks, are made from granite. Where does curling stone granite come from? Curling stone granite exclusively comes from Author: Phil Haigh. Feb 15,  · Ever wonder how curling stones are made? Get the full history and 'making of' right here!Subscribe to Discovery UK for more great clips:medatlove.com

Every four years, one winter sport in w manages to capture the international zeitgeist for the briefest of moments before disappearing into obscurity until the next Oof.

Nestled in between events that require athletes to hurl themselves from the tops of mountains and launch themselves into the air with blades attached to their feet, curling functions as a mental reprieve for those of kade who are more athletically challenged.

However, as what is a curling stone made out of undemanding what is a curling stone made out of curling is on the body, the same cannot be said for the curling stones themselves. It turns out there are very few types of rock in existence that can withstand mase stress of gliding along melting ice and curlign into more rock.

Most granite is iut quartz-rich for it to withstand the impact under curling conditions, which is what makes the granite found on a tiny deserted island off the Scottish coast so special. And it turns out that the unique makeup of the rock left behind is uniquely suited for making curling stones.

Kays of Scotland has been making curling stones since and has the exclusive rights to the Ailsa Craig granite, which is why it has provided the stones for every single competition at the Olympic Winter Games. About every what are the different religions years, Kays extracts several thousand tons of the distinctive blue and green varieties. The blue hone, whose tight molecular structure makes it impervious to water and melting ice, is used for the insert and running band of the stone, while the green granite makes up the body.

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They are made of this - This is Ailsa Craig, an uninhabited island of about acres about 10 miles offshore in the Firth of Clyde in Scotland. Around 60% of curling stones are made from Ailsa Craig granite, which is 'harvested' every few years b. Feb 18,  · And it turns out that the unique makeup of the rock left behind is uniquely suited for making curling stones. There are three subgroups of the water-resistant microgranite that can can be mined from the island: Ailsa Craig Common Green Granite, Ailsa Craig Blue Hone Granite and Ailsa Craig Red Hone Granite.

Curling is a sport in which players slide stones on a sheet of ice toward a target area which is segmented into four concentric circles.

It is related to bowls , boules and shuffleboard. Two teams, each with four players, take turns sliding heavy, polished granite stones, also called rocks , across the ice curling sheet toward the house , a circular target marked on the ice. The purpose is to accumulate the highest score for a game ; points are scored for the stones resting closest to the centre of the house at the conclusion of each end , which is completed when both teams have thrown all of their stones.

A game usually consists of eight or ten ends. The player can induce a curved path, described as curl , by causing the stone to slowly turn as it slides. The path of the rock may be further influenced by two sweepers with brooms or brushes, who accompany it as it slides down the sheet and sweep the ice in front of the stone. A great deal of strategy and teamwork go into choosing the ideal path and placement of a stone for each situation, and the skills of the curlers determine the degree to which the stone will achieve the desired result.

This gives curling its nickname of " chess on ice". Evidence that curling existed in Scotland in the early 16th century includes a curling stone inscribed with the date found along with another bearing the date when an old pond was drained at Dunblane, Scotland.

The word curling first appears in print in in Perth, Scotland , in the preface and the verses of a poem by Henry Adamson. Kilsyth Curling Club claims to be the first club in the world, having been formally constituted in ; [13] it is still in existence today. In the early history of curling, the playing stones were simply flat-bottomed stones from rivers or fields, which lacked a handle and were of inconsistent size, shape and smoothness.

The sport was often played on frozen rivers although purpose-built ponds were later created in many Scottish towns. In Darvel , East Ayrshire , the weavers relaxed by playing curling matches using the heavy stone weights from the looms' warp beams , fitted with a detachable handle for the purpose. Many a wife would keep her husband's brass curling stone handle on the mantelpiece, brightly polished until the next time it was needed.

Outdoor curling was very popular in Scotland between the 16th and 19th centuries because the climate provided good ice conditions every winter. Scotland is home to the international governing body for curling, the World Curling Federation in Perth , which originated as a committee of the Royal Caledonian Curling Club, the mother club of curling.

Today, the sport is most firmly established in Canada , having been taken there by Scottish emigrants. The Royal Montreal Curling Club , the oldest established sports club still active in North America , [25] was established in The first curling club in the United States was established in , and the sport was introduced to Switzerland and Sweden before the end of the 19th century, also by Scots.

The first world championship for curling was limited to men and was known as the Scotch Cup , held in Falkirk and Edinburgh , Scotland , in The first world title was won by the Canadian team from Regina, Saskatchewan , skipped by Ernie Richardson.

The skip is the team member who calls the shots; see below. Curling was one of the first sports that was popular with women and girls. It currently includes men's, women's and mixed doubles tournaments the mixed doubles event was held for the first time in In February , the International Olympic Committee retroactively decided that the curling competition from the Winter Olympics originally called Semaine des Sports d'Hiver , or International Winter Sports Week would be considered official Olympic events and no longer be considered demonstration events.

Thus, the first Olympic medals in curling , which at the time was played outdoors, were awarded for the Winter Games, with the gold medal won by Great Britain, two silver medals by Sweden, and the bronze by France. A demonstration tournament was also held during the Winter Olympic Games between four teams from Canada and four teams from the United States, with Canada winning 12 games to 4.

Since the sport's official addition in the Olympics, Canada has dominated the sport with their men's teams winning gold in , , and , and silver in and The women's team won gold in and , a silver in , and a bronze in and The mixed doubles team won gold in The shorter borders of the sheet are called the backboards.

Because of the elongated shape, several sheets may be laid out side by side in the same arena, allowing multiple games to be played simultaneously. A target, the house , is centred on the intersection of the centre line , drawn lengthwise down the centre of the sheet and the tee line , drawn 16 feet 4.

These lines divide the house into quarters. The house consists of a centre circle the button and three concentric rings, of diameters 4, 8 and 12 feet, formed by painting or laying coloured vinyl sheet under the ice and are usually distinguished by colour.

A stone must at least touch the outer ring in order to score see Scoring below ; otherwise the rings are merely a visual aid for aiming and judging which stone is closer to the button. Two hog lines are drawn 37 feet 11 m from, and parallel to, the backboard. The hacks , which give the thrower something to push against when making the throw, are fixed 12 feet 3. On indoor rinks, there are usually two fixed hacks, rubber-lined holes, one on each side of the centre line, with the inside edge no more than 3 inches 76 mm from the centre line and the front edge on the hack line.

A single moveable hack may also be used. The ice may be natural but is usually frozen by a refrigeration plant pumping a brine solution through numerous pipes fixed lengthwise at the bottom of a shallow pan of water. Most curling clubs have an ice maker whose main job is to care for the ice.

At the major curling championships, ice maintenance is extremely important. It is common for each sheet of ice to have multiple sensors embedded in order to monitor surface temperature, as well as probes set up in the seating area to monitor humidity and in the compressor room to monitor brine supply and return temperatures.

A key part of the preparation of the playing surface is the spraying of water droplets onto the ice, which form pebble on freezing. The pebbled ice surface resembles an orange peel, and the stone moves on top of the pebbled ice. The amount of curl commonly referred to as the feet of curl can change during a game as the pebble wears; the ice maker must monitor this and be prepared to scrape and re-pebble the surface prior to each game.

The curling stone also sometimes called a rock in North America is made of granite and is specified by the World Curling Federation, which requires a weight between 38 and 44 pounds This concave bottom was first proposed by J.

Russell of Toronto, Ontario, Canada sometime after , and was subsequently adopted by Scottish stone manufacturer Andrew Kay. Blue Hone has very low water absorption, which prevents the action of repeatedly freezing water from eroding the stone. In the past, most curling stones were made from Blue Hone but the island is now a wildlife reserve and the quarry is restricted by environmental conditions that exclude blasting.

Kays of Scotland has been making curling stones in Mauchline, Ayrshire, since and has the exclusive rights to the Ailsa Craig granite, granted by the Marquess of Ailsa , whose family has owned the island since According to the Census , Andrew Kay employed 30 people in his curling stone factory in Mauchline.

Kays have been involved in providing curling stones for the Winter Olympics since Chamonix in and has been the exclusive manufacturer of curling stones for the Olympics since the Winter Olympics. Trefor granite comes in shades of pink, blue and grey. A handle is attached by a bolt running vertically through a hole in the centre of the stone. The handle allows the stone to be gripped and rotated upon release; on properly prepared ice the rotation will bend curl the path of the stone in the direction in which the front edge of the stone is turning, especially as the stone slows.

Handles are coloured to identify each team, two popular colours in major tournaments being red and yellow. In competition, an electronic handle known as the eye on the hog may be fitted to detect hog line violations. This electronically detects whether the thrower's hand is in contact with the handle as it passes the hog line and indicates a violation by lights at the base of the handle see delivery below.

The eye on the hog eliminates human error and the need for hog line officials. The curling broom , or brush , is used to sweep the ice surface in the path of the stone see sweeping and is also often used as a balancing aid during delivery of the stone. Prior to the s, most curling brooms were made of corn strands and were similar to household brooms of the day.

In , Fern Marchessault of Montreal inverted the corn straw in the centre of the broom. This style of corn broom was referred to as the Blackjack. Artificial brooms made from man-made fabrics rather than corn, such as the Rink Rat , also became common later during this time period. Prior to the late sixties, Scottish curling brushes were used primarily by some of the Scots, as well as by recreational and elderly curlers, as a substitute for corn brooms, since the technique was easier to learn.

In the late sixties, competitive curlers from Calgary , Alberta , such as John Mayer, Bruce Stewart, and, later, the world junior championship teams skipped by Paul Gowsell , proved that the curling brush could be just as or more effective without all the blisters common to corn broom use.

Eventually, the brush won out with the majority of curlers making the switch to the less costly and more efficient brush.

Today, brushes have replaced traditional corn brooms at every level of curling; it is rare now to see a curler using a corn broom on a regular basis.

Curling brushes may have fabric, hog hair, or horsehair heads. Modern curling brush handles are usually hollow tubes made of fibreglass or carbon fibre instead of a solid length of wooden dowel. These hollow tube handles are lighter and stronger than wooden handles, allowing faster sweeping and also enabling more downward force to be applied to the broom head with reduced shaft flex.

New, "directional fabric" brooms, which players are worried will alter the fundamentals of the sport by reducing the level of skill required, have been accused of giving players an unfair advantage. The new brooms give sweepers unprecedented control over the direction the stone goes. Curling shoes are similar to ordinary athletic shoes except for special soles; the slider shoe usually known as a "slider" is designed for the sliding foot and the "gripper shoe" usually known as a gripper for the foot that kicks off from the hack.

The slider is designed to slide and typically has a Teflon sole. It is worn by the thrower during delivery from the hack and by sweepers or the skip to glide down the ice when sweeping or otherwise traveling down the sheet quickly. Stainless steel and "red brick" sliders with lateral blocks of PVC on the sole are also available as alternatives to Teflon. Most shoes have a full-sole sliding surface, but some shoes have a sliding surface covering only the outline of the shoe and other enhancements with the full-sole slider.

Some shoes have small disc sliders covering the front and heel portions or only the front portion of the foot, which allow more flexibility in the sliding foot for curlers playing with tuck deliveries.

Ordinary athletic shoes may be converted to sliders by using a step-on or slip-on Teflon slider or by applying electrical or gaffer tape directly to the sole or over a piece of cardboard. This arrangement often suits casual or beginning players.

The gripper is worn by the thrower on the foot that kicks off from the hack during delivery and is designed to grip the ice. It may have a normal athletic shoe sole or a special layer of rubbery material applied to the sole of a thickness to match the sliding shoe. The toe of the hack foot shoe may also have a rubberised coating on the top surface or a flap that hangs over the toe to reduce wear on the top of the shoe as it drags on the ice behind the thrower.

The purpose of a game is to score points by getting stones closer to the house centre, or the "button", than the other team's stones. An end is complete when all eight rocks from each team have been delivered, a total of sixteen stones. If the teams are tied at the end of regulation, often extra ends are played to break the tie. The winner is the team with the highest score after all ends have been completed see Scoring below. A game may be conceded if winning the game is infeasible.

International competitive games are generally ten ends, so most of the national championships that send a representative to the World Championships or Olympics also play ten ends. However, there is a movement on the World Curling Tour to make the games only eight ends. In international competition, each side is given 73 minutes to complete all of its throws.

Each team is also allowed two minute-long timeouts per end game. If extra ends are required, each team is allowed 10 minutes of playing time to complete its throws and one added second timeout for each extra end.

3 Comments:

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