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95-484: Solheim began PING golf as a garage business in 1959. His frustration during the game of golf resulted from his difficulty putting with the equipment of the era. The engineer from General Electric invented a new putter in his garage known as the "PING 1A". Instead of attaching the shaft at the heel of the blade, he attached it in the center. He applied scientific principles to golf club design, which had previously been based largely on trial and error, transferring much of

190-400: A ball into a series of holes on a course in as few strokes as possible. Golf, unlike most ball games , cannot and does not use a standardized playing area, and coping with the varied terrains encountered on different courses is a key part of the game. Courses typically have either 9 or 18 holes , regions of terrain that each contain a cup , the hole that receives the ball. Each hole on

285-435: A "bogey golfer" (handicap around 20) would be expected to play than a "scratch golfer" relative to their handicap. The goal is to play as few strokes per round as possible. A golfer's number of strokes in a hole, course, or tournament is compared to its respective par score, and is then reported either as the number that the golfer was "under-" or "over-par", or if it was "equal to par". A hole in one (or an "ace") occurs when

380-421: A backpack, and often bags have retractable legs that allow the bag to stand upright when at rest. The golf swing is outwardly similar to many other motions involving swinging a tool or playing implement, such as an axe or a baseball bat. However, unlike many of these motions, the result of the swing is highly dependent on several sub-motions being properly aligned and timed. These ensure that the club travels up to

475-415: A ball that has stopped on it; "doglegs", which are changes in the direction of the fairway that often require shorter shots to play around them; bunkers (or sand traps); and water hazards such as ponds or streams. In stroke play competitions each player plays their ball until it is holed no matter how many strokes that may take. In match play it is acceptable to simply pick up one's ball and "surrender

570-455: A checklist of the player's physical characteristics, common problems, and distances. The 2011 checklist at the Ping website contained approximately 100 data inputs and was part of a 5-step fitting process covering everything from driver to putter. To make custom fitting more feasible, Ping manufactures some iron clubheads with a small notch in the clubhead. The notch allows the clubhead to be bent to

665-536: A complete round; with most holes having a par of 4, and a smaller number of par-3 and par-5 holes. Additionally, courses may be classified according to their play difficulty, which may be used to calculate a golfer's handicap . The two primary difficulty ratings in the U.S. are the Course Rating, which is the expected score for a zero-handicap "scratch golfer", and the Slope Rating, which is a measure of how much worse

760-432: A course has a teeing ground for the hole's first stroke, and a putting green containing the cup. There are several standard forms of terrain between the tee and the green, such as the fairway, rough (tall grass), and various hazards that may be water, rocks, or sand-filled bunkers . Each hole on a course is unique in its specific layout. Many golf courses are designed to resemble their native landscape, such as along

855-418: A full 18. In sudden death, a player who scores lower on a hole than all of their opponents wins the match. If at least two players remain tied after such a playoff using a pre-determined number of holes, then play continues in sudden death format, where the first player to win a hole wins the tournament. Investment casting Investment casting is an industrial process based on lost-wax casting , one of

950-566: A golf club at a small ball with the aim of sinking it into a hole. The game is thought to have been introduced into Europe during the Middle Ages. Another early game that resembled modern golf was known as cambuca in England and chambot in France. The Persian game chowkan is another possible ancient origin, albeit being more polo -like. In addition, kolven (a game involving a ball and curved bats)

1045-420: A golf course, and which club is used to accomplish the shot, are always completely at the discretion of the golfer; in other words, there is no restriction whatsoever on which club a golfer may or may not use at any time for any shot. Golf balls are spherical, usually white (although other colours are allowed), and minutely pock-marked by dimples that decrease aerodynamic drag by increasing air turbulence around

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1140-410: A golfer sinks their ball into the cup with their first stroke from the tee. Common scores for a hole also have specific terms. In a typical professional tournament or among "scratch" amateur players, "birdie-bogey" play is common; a player will "lose" a stroke by bogeying a hole, then "gain" one by scoring a birdie. Eagles are uncommon but not rare; however, only 18 players have scored an albatross in

1235-453: A great deal of difference in how well the ball is hit and how straight it travels. The general goal of a player making a full swing is to propel the clubhead as fast as possible while maintaining a single "plane" of motion of the club and clubhead, to send the clubhead into the ball along the desired path of travel and with the clubhead also pointing that direction. Accuracy and consistency are typically stressed over pure distance. A player with

1330-439: A higher degree of loft and a comparatively shorter distance. The actual physical length of each club is longer or shorter, depending on the distance the club is intended to propel the ball. Golf clubs have traditionally been arranged into three basic types. Woods are large-headed, long-shafted clubs meant to propel the ball a long distance from relatively "open" lies, such as the teeing ground and fairway. Of particular importance

1425-453: A higher launch angle and a more forgiving nature. A maximum of 14 clubs is allowed in a player's bag at one time during a stipulated round. The choice of clubs is at the golfer's discretion, although every club must be constructed in accordance with parameters outlined in the rules. (Clubs that meet these parameters are usually called "conforming".) Violation of these rules can result in disqualification. The exact shot hit at any given time on

1520-406: A men's major championship. One of the rarest feats in golf is the condor, which has never occurred in a professional tournament. Only five condors have been verified to have ever occurred, although none of the courses involved were professionally accredited. There are two basic forms of golf play, match play and stroke play. Stroke play is more popular. Two players (or two teams) play each hole as

1615-409: A metal head primarily consisting of a flat, angled striking face. Traditionally the clubhead was forged from iron; modern iron clubheads are investment-cast from a steel alloy. Irons of varying loft are used for a variety of shots from virtually anywhere on the course, but most often for shorter-distance shots approaching the green, or to get the ball out of tricky lies such as sand traps. The third class

1710-483: A player's obligation to contribute to the care of the course. Though there are no penalties for breach of etiquette rules, players generally follow the rules of golf etiquette in an effort to improve everyone's playing experience. Penalty strokes are incurred in certain situations and are counted towards a player's score as if there were extra swing(s) at the ball. Either one or two strokes are added for most rule infractions or for taking relief from various situations, with

1805-513: A round. At some courses, gas or electric golf carts are used to travel between shots, which can speed-up play and allows participation by individuals unable to walk a whole round. On other courses players generally walk the course, either carrying their bag using a shoulder strap or using a "golf trolley" for their bag. These trolleys may or may not be battery assisted. At many amateur tournaments including U.S. high school and college play, players are required to walk and to carry their own bags, but at

1900-500: A sea coast (where the course is called a links ), within a forest, among rolling hills, or part of a desert . Golf is played for the lowest number of strokes by an individual, known as stroke play , or the lowest score on the most individual holes in a complete round by an individual or team, known as match play . Stroke play is the most commonly seen format at all levels, especially at the elite level. The modern game of golf originated in 15th century Scotland . The 18-hole round

1995-400: A separate contest against each other in what is called match play . The party with the lower score wins that hole, or if the scores of both players or teams are equal the hole is "halved" (or tied). The game is won by the party that wins more holes than the other. In the case that one team or player has taken a lead that cannot be overcome in the number of holes remaining to be played, the match

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2090-469: A straight drive that travels only 220 yards (200 m) will nevertheless be able to accurately place the ball into a favourable lie on the fairway, and can make up for the lesser distance of any given club by simply using "more club" (a lower loft) on their tee shot or on subsequent fairway and approach shots. However, a golfer with a drive that may go 280 yards (260 m) but often does not fly straight will be less able to position their ball advantageously;

2185-452: A stroke; it is fundamentally important in being able to play a stroke effectively. The stance adopted is determined by what stroke is being played. All stances involve a slight crouch. This allows for a more efficient striking posture whilst also isometrically preloading the muscles of the legs and core; this allows the stroke to be played more dynamically and with a greater level of overall control. When adopting their stance golfers start with

2280-479: A typical par-3 hole is less than 250 yards (230 m) in length, with a par-4 hole ranging between 251–450 yards (230–411 m), and a par-5 hole being longer than 450 yards (410 m); for women these boundaries are lower, and for professionals they are much increased. The rare par-6s can stretch well over 650 yards (590 m). These distances are based on the typical scratch golfer's drive distance of between 240 and 280 yards (220 and 260 m). Although length

2375-412: A vacuum to improve the quality of the casting and minimize porosity . Typically VPC machines consist of an upper and a lower chamber—the upper chamber, or melting chamber, housing the crucible, and the lower casting chamber housing the investment mould. Both chambers are connected via a small hole containing a stopper. A vacuum is pulled in the lower chamber, while pressure is applied in the upper, and then

2470-498: A wax pattern compound of excellent properties, developed an investment material, and invented an air-pressure casting machine. In the 1940s, World War II increased the demand for precision net shape manufacturing and specialized alloys that could not be shaped by traditional methods, or that required too much machining. Industry turned to investment casting. After the war, its use spread to many commercial and industrial applications that used complex metal parts. Investment casting

2565-557: Is 1.3–4 micrometres (50–125 μin) RMS. The history of lost-wax casting dates back thousands of years. Its earliest use was for idols , ornaments and jewellery , using natural beeswax for patterns, clay for the moulds and manually operated bellows for stoking furnaces. Examples have been found across the world, such as in the Harappan Civilisation (2500–2000 BC) idols, Egypt 's tombs of Tutankhamun (1333–1324 BC), Mesopotamia , Aztec and Mayan Mexico , and

2660-426: Is about two hours for a 9-hole round and four hours for an 18-hole round. Playing a hole on a golf course is initiated by putting a ball into play by striking it with a club on the teeing ground (also called the tee box, or simply the tee). For this first shot on each hole, it is allowed but not required for the golfer to place the ball on a tee prior to striking it. A tee is a small peg that can be used to elevate

2755-656: Is certified as the oldest golf course in the world by Guinness World Records . The oldest surviving rules of golf were compiled in March 1744 for the Company of Gentlemen Golfers, later renamed The Honourable Company of Edinburgh Golfers , which was played at Leith , Scotland. The world's oldest golf tournament in existence, and golf's first major, is The Open Championship , which was first played on 17 October 1860 at Prestwick Golf Club, in Ayrshire, Scotland, with Scottish golfers winning

2850-412: Is deemed to be won by the party in the lead, and the remainder of the holes are not played. For example, if one party already has a lead of six holes, and only five holes remain to be played on the course, the match is over and the winning party is deemed to have won "6 & 5". At any given point, if the lead is equal to the number of holes remaining, the party leading the match is said to be "dormie", and

2945-515: Is drawn from below the top of the pool, so the metal is free from dross and slag (which are lower density (lighter) and float to the top of the pool). The pressure differential helps the metal flow into every intricacy of the mould. Finally, lower temperatures can be used, which improves the grain structure. This process is also used to cast refractory ceramics under the term vacuum casting . Vacuum pressure casting ( VPC ), properly referred to as vacuum assist direct pour , uses gas pressure and

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3040-424: Is known as "conventional". There are many variations of conventional including overlap, where the golfer overlaps the off hand index finger onto off the dominant pinky; interlock, where the offhand index finger interlocks with the dominant pinky and ring finger; double or triple overlap and so on. Recently, "cross handed" putting has become a popular trend amongst professional golfers and amateurs. Cross handed putting

3135-516: Is not considered an amateur and may not participate in competitions limited solely to amateurs. However, amateur golfers may receive expenses that comply with strict guidelines and they may accept non-cash prizes within the limits established by the Rules of Amateur Status. In addition to the officially printed rules, golfers also abide by a set of guidelines called golf etiquette . Etiquette guidelines cover matters such as safety, fairness, pace of play, and

3230-441: Is still there today. Every round of golf is based on playing a number of holes in a given order. A "round" typically consists of 18 holes that are played in the order determined by the course layout. Each hole is played once in the round on a standard course of 18 holes. The game can be played by any number of people, although a typical group will have 1–4 people playing the round. The typical amount of time required for pace of play

3325-444: Is the driver or "1-wood", which is the lowest lofted wood club, and in modern times has become highly specialized for making extremely long-distance tee shots, up to 300 yards (270 m), or more, in a professional golfer's hands. Traditionally these clubs had heads made of a hardwood, hence the name, but virtually all modern woods are now made of metal such as titanium, or of composite materials. Irons are shorter-shafted clubs with

3420-407: Is the putter , which evolved from the irons to create a low-lofted, balanced club designed to roll the ball along the green and into the hole. Putters are virtually always used on the green or in the surrounding rough/fringe. A fourth class, called hybrids , evolved as a cross between woods and irons, and are typically seen replacing the low-lofted irons with a club that provides similar distance, but

3515-439: Is the idea that the dominant hand is on top of the grip where the weak hand is on the bottom. This grip restricts the motion in your dominant hand and eliminates the possibility of wrist breakdowns through the putting stroke. Other notable putting styles include "the claw", a style that has the grip directly in between the thumb and index finger of the dominant hand while the palm faces the target. The weak hand placed normally on

3610-450: Is the primary factor in calculating par, other factors are taken into account; however the number of strokes a scratch golfer should take to make the green remains foremost. Factors affecting the calculation include altitude, gradient of the land from the tee to green, and forced " lay-ups " due to dog-legs (sharp bends) or obstacles (e.g. bunkers, water hazards). Getting the ball onto the green in two strokes less than par, and hence meeting

3705-407: Is typically positioned more to the "front" of the player's stance (closer to the leading foot) for lower-lofted clubs, with the usual ball position for a drive being just behind the arch of the leading foot. The ball is placed further "back" in the player's stance (toward the trailing foot) as the loft of the club to be used increases. Most iron shots and putts are made with the ball roughly centered in

3800-550: Is used in the aerospace and power generation industries to produce turbine blades with complex shapes or cooling systems. Blades produced by investment casting can include single-crystal (SX), directionally solidified (DS), or conventional equiaxed blades. Investment casting is also widely used by firearms manufacturers to fabricate firearm receivers, triggers, hammers, and other precision parts at low cost. Karsten Solheim famously revolutionized golf club design through his company PING by incorporating investment casting for

3895-406: Is used to transport golf clubs and the player's other or personal equipment. Golf bags have several pockets designed for carrying equipment and supplies such as tees, balls, and gloves. Golf bags can be carried, pulled on a trolley or harnessed to a motorized golf cart during play. Golf bags usually have both a hand strap and shoulder strap for carrying, others may be carried over both shoulders like

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3990-406: Is valued for its ability to produce components with accuracy, repeatability, versatility and integrity in a variety of metals and high-performance alloys. The fragile wax patterns must withstand forces encountered during the mould making. Much of the wax used in investment casting can be reclaimed and reused. Lost-foam casting is a modern form of investment casting that eliminates certain steps in

4085-557: The Benin civilization in Africa where the process produced detailed artwork of copper, bronze and gold. By far, one of the earliest identified uses of the investment casting process was seen in objects found in the 'Cave of Treasure', discovered in Southern Israel. These items were identified as being made around 3700 BC using Carbon-14 dating techniques. The earliest known text that describes

4180-510: The Loggia dei Lanzi in Florence , Italy . Investment casting came into use as a modern industrial process in the late 19th century, when dentists began using it to make crowns and inlays, as described by Barnabas Frederick Philbrook of Council Bluffs, Iowa in 1897. Its use was accelerated by William H. Taggart of Chicago, whose 1907 paper described his development of a technique . He also formulated

4275-562: The PGA Championship . While the modern game of golf originated in 15th century Scotland , the game's ancient origins are unclear and much debated. Some historians trace the sport back to the Roman game of paganica , in which participants used a bent stick to hit a stuffed leather ball. One theory asserts that paganica spread throughout Europe as the Romans conquered most of the continent, during

4370-665: The United States Golf Association (USGA). With the aim of simplifying the rules, in 2017 the USGA and R&A undertook a complete rewrite. The new rule book came into effect in January 2019. The underlying principle of the rules is fairness. As stated on the back cover of the official rule book: There are strict regulations regarding the amateur status of golfers. Essentially, anybody who has ever received payment or compensation for giving instruction, or played golf for money,

4465-410: The "general penalty" defined as two-strokes, and disqualification for severe or repeated rule breaches. Examples include: Golf clubs are used to hit a golf ball . Each club is composed of a shaft with a lance (or "grip") on the top end and a club head on the bottom. Long clubs, which have a lower amount of degree loft, are those meant to propel the ball a comparatively longer distance, and short clubs

4560-505: The 1960s came with K1 stainless cast steel iron set. During a White House meeting between President Donald Trump and Norwegian Prime minister Erna Solberg on January 10, 2018, Solberg gave Trump a Ping "Bergen" Putter as a gift as a symbol of the close ties between the nations, and the history of Norwegian immigration to the United States. Born in Norway, Ping's founder Karsten Solheim

4655-499: The King that he playit with". To many golfers, the Old Course at St Andrews , a links course dating to before 1574, is considered to be a site of pilgrimage. In 1764, the standard 18-hole golf course was created at St Andrews when members modified the course from 22 to 18 holes. Golf is documented as being played on Musselburgh Links , East Lothian, Scotland as early as 2 March 1672, which

4750-616: The Ping brand of clubs in Phoenix, Arizona . The patent for the PING Anser putter came on March 21, 1967. The first major championship to be won using a PING putter came in 1969 at the Masters . In 1969, Ping introduced irons based on the same principle of perimeter weighting, and these were quickly successful. The other golf equipment manufacturers soon followed Ping's innovations, which became industry standards. The last major innovation by PING during

4845-560: The Scots language and the Old English word hlinc ("rising ground, ridge"): traditionally these are coastal sand dunes but sometimes open parkland. This gave rise to the term "golf links", particularly applied to seaside courses and those built on naturally sandy soil inland. The first 18-hole golf course in the United States was on a sheep farm in Downers Grove, Illinois , in 1892. The course

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4940-533: The Solheims moved from Redwood City, California to Phoenix, Arizona where the company would find a permanent home. Despite the increasing sales of the PING putter, Solheim continued to create his putters single-handedly in his garage after departing General Electric . In the same year, he invented his first set of irons which he named "69", which he considered to be a good round of golf. Solheim continued to experiment with

5035-432: The balance in muscles. Putting is considered to be the most important component of the game of golf. As the game of golf has evolved, there have been many different putting techniques and grips that have been devised to give golfers the best chance to make putts. When the game originated, golfers would putt with their dominant hand on the bottom of the grip and their weak hand on top of the grip. This grip and putting style

5130-442: The ball by taking their stance to the side of it and (except when the ball lies in a hazard) grounding the club behind the ball. The golfer then takes their backswing, rotating the club, their arms and their upper body away from the ball, and then begins their swing, bringing the clubhead back down and around to hit the ball. A proper golf swing is a complex combination of motions, and slight variations in posture or positioning can make

5225-590: The ball comes to rest, the golfer strikes it again as many times as necessary using shots that are variously known as a "lay-up", an "approach", a "pitch", or a " chip ", until the ball reaches the green, where the golfer then " putts " the ball into the hole (commonly called "sinking the putt" or "holing out"). The goal of getting the ball into the hole ("holing" the ball) in as few strokes as possible may be impeded by obstacles such as areas of longer grass called "rough" (usually found alongside fairways), which both slows any ball that contacts it and makes it harder to advance

5320-425: The ball in line with the desired path; that the clubface is in line with the swing path; and that the ball hits the centre or "sweet spot" of the clubface. The ability to do this consistently, across a complete set of clubs with a wide range of shaft lengths and clubface areas, is a key skill for any golfer, and takes a significant effort to achieve. Stance refers to how the golfer positions themselves in order to play

5415-559: The ball in motion, which delays "boundary layer" separation and reduces the drag-inducing "wake" behind the ball, thereby allowing the ball to fly farther. The combination of a soft "boundary layer" and a hard "core" enables both distance and spin. A tee is allowed only for the first stroke on each hole, unless the player must hit a provisional tee shot or replay their first shot from the tee. Many golfers wear golf shoes with metal or plastic spikes designed to increase traction, thus allowing for longer and more accurate shots. A golf bag

5510-482: The ball may "hook", "pull", "draw", "fade", "push" or "slice" off the intended line and land out of bounds or in the rough or hazards, and thus the player will require many more strokes to hole out. A golf stroke uses the muscles of the core (especially erector spinae muscles and latissimus dorsi muscle when turning), hamstring , shoulder , and wrist . Stronger muscles in the wrist can prevent them from being twisted during swings, whilst stronger shoulders increase

5605-413: The ball slightly above the ground up to a few centimetres high. Tees are commonly made of wood but may be constructed of any material, including plastic. Traditionally, golfers used mounds of sand to elevate the ball, and containers of sand were provided for the purpose. A few courses still require sand to be used instead of peg tees, to reduce litter and reduce damage to the teeing ground. Tees help reduce

5700-412: The bounds of the legal tee area, fairway , rough and other hazards , and the putting green surrounded by the fringe with the pin (normally a flagstick) and cup. The levels of grass are varied to increase difficulty, or to allow for putting in the case of the green. While many holes are designed with a direct line-of-sight from the teeing area to the green, some holes may bend either to the left or to

5795-981: The ceramic mould is made of water glass quartz sand. Silica sol method dewaxes into the flash fire, and silica sol zircon sand makes the ceramic mould. Silica sol method costs more but has the better surface than the water glass method. The process can be used for both small castings of a few ounces and large castings weighing several hundred pounds. However, it is most suitable for small parts at large volumes. It can be more expensive than die casting or sand casting , but per-unit costs decrease with large volumes. Investment casting can produce complicated shapes that would be difficult or impossible with other casting methods. It can also produce products with exceptional surface qualities and low tolerances with minimal surface finishing or machining required. Castings can be made from an original wax model (the direct method) or from wax replicas of an original pattern that need not be made from wax (the indirect method). The following steps describe

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5890-477: The committee may designate a maximum score possible for a hole for the same reasons, while formalizing the surrender or "pick-up" rule. The total distance from the first teeing ground to the 18th green can be quite long; total yardages "through the green" can be in excess of 7,000 yards (6,400 m), and when adding in the travel distance between the green of one hole and the tee of the next, even skilled players may easily travel 5 miles (8.0 km) or more during

5985-458: The earliest majors . Two Scotsmen from Dunfermline , John Reid and Robert Lockhart, first demonstrated golf in the U.S. by setting up a hole in an orchard in 1888, with Reid setting up America's first golf club the same year, Saint Andrew's Golf Club in Yonkers, New York. A golf course consists of either 9 or 18 holes, each with a teeing ground or "tee box" that is set off by two markers showing

6080-500: The effects of good heel-toe weighting in his irons and also milled a cavity into the steel back of the irons for added forgiveness. The first PGA Tour victory while using a PING club came in 1962 at the Cajun Classic Open Invitational by John Barnum . Sales of the PING putters rose as the popularity steadily increased. The Golf World Cup of 1965 brought even greater sales of the garage-made PING putters as many of

6175-463: The first century BC, and eventually evolved into the modern game. Others cite chuiwan (捶丸; "chui" means striking and "wan" means small ball) as the progenitor, a Chinese game played between the eighth and fourteenth centuries. A Ming Dynasty scroll by the artist Youqiu dating back to 1368 entitled "The Autumn Banquet" shows a member of the Chinese Imperial court swinging what appears to be

6270-541: The first time for clubheads. Quickly the process became an industry standard to allow weight distribution around the perimeter of the clubhead. Other industries that use standard investment-cast parts include military, aerospace, medical, jewelry, airline, automotive and golf clubs especially since the start of 3D printing technology. With the increased availability of higher-resolution 3D printers , 3D printing has begun to be used to make much larger sacrificial moulds used in investment casting. Planetary Resources has used

6365-541: The gravity pouring technique is to fill the mould using a vacuum. A common form of this is called the Hitchiner process after the Hitchiner Manufacturing Company that invented the technique. In this technique, the mould has a downward fill pipe that is lowered into the melt. A vacuum draws the melt into the cavity; when the important parts have solidified, the vacuum is released, and the unused material leaves

6460-427: The hardness of refractory materials used, investment casting can produce products with exceptional surface qualities, which can reduce the need for secondary machine processes. Water glass and silica sol investment casting are the two primary investment casting methods currently in use. The main differences are the surface roughness and cost of casting. Water glass method dewaxes into the high-temperature water, and

6555-475: The hole" after enough strokes have been made by a player that it is mathematically impossible for the player to win the hole. It is also acceptable in informal stroke play to surrender the hole after hitting three strokes more than the "par" rating of the hole (a "triple bogey" – see below); while technically a violation of Rule 3–2, this practice speeds play as a courtesy to others, and avoids "runaway scores" and excessive frustration. Alternatively, in competition,

6650-494: The hole. The primary factor for classifying the par of a relatively straight, hazard-free hole is the distance from the tee to the green, and calculates the number of strokes a skilled golfer is expected to require to reach the green with an additional allowance of 2 putts. As such, the minimum par of any hole is 3; one stroke for the tee shot and two putts. Par 3, 4 and 5 holes are commonplace on golf courses; far more rarely, courses may feature par-6 and even par-7 holes. For men,

6745-577: The indirect process, which can take two to seven days to complete. The main disadvantage is the overall cost, especially for short-run productions. Some of the reasons for the high cost include specialized equipment, costly refractories, and binders, many operations to make a mould, a lot of labor is needed and occasional minute defects occur. However, the cost is still less than producing the same part by machining from bar stock ; for example, gun manufacturing has moved to investment casting to lower costs of producing pistols . Additionally: The variation on

6840-492: The interference of the ground or grass on the movement of the club making the ball easier to hit by elevating the ball from the playing surface. When the initial shot on a hole is intended to move the ball a long distance, typically more than 225 yards (210 m), the shot is commonly called a "drive" and is generally made with a long-shafted, large-headed wood club called a "driver". Shorter holes may be initiated with other clubs, such as higher-numbered woods or irons . Once

6935-521: The investment casting process (Schedula Diversarum Artium) was written around 1100 A.D. by Theophilus Presbyter , a monk who described various manufacturing processes, including the recipe for parchment . This book was used by sculptor and goldsmith Benvenuto Cellini (1500–1571), who detailed in his autobiography the investment casting process he used for the Perseus with the Head of Medusa sculpture that stands in

7030-413: The match is continued until the party increases the lead by one hole or ties any of the remaining holes, thereby winning the match, or until the match ends in a tie with the lead player's opponent winning all remaining holes. When the game is tied after the predetermined number of holes have been played, it may be continued until one side takes a one-hole lead. The score achieved for each and every hole of

7125-414: The most common. In industrial use, the size limits are 3 g (0.1 oz) to several hundred kilograms. The cross-sectional limits are 0.6 mm (0.024 in) to 75 mm (3.0 in). Typical tolerances are 0.1 mm for the first 25 mm (0.005 in for the first inch) and 0.02 mm for the each additional centimeter (0.002 in for each additional inch). A standard surface finish

7220-483: The mould. The technique can use substantially less material than gravity pouring because the sprue and some gating need not solidify. This technique is more metal efficient than traditional pouring because less material solidifies in the gating system. Gravity pouring only has a 15 to 50% metal yield compared to 60 to 95% for counter-gravity pouring. There is also less turbulence, so the gating system can be simplified since it does not have to control turbulence. The metal

7315-583: The non-dominant side of the body facing the target (for a right-hander, the target is to their left). Setting the stance in regard to the position of the ball, and placing the clubhead behind the ball, is known as being at address; when in this position the player's body and the centerline of the club face are positioned parallel to the desired line of travel, with the feet either perpendicular to that line or slightly splayed outward. The feet are commonly shoulder-width apart for middle irons and putters, narrower for short irons and wider for long irons and woods. The ball

7410-430: The oldest known metal-forming techniques. The term "lost-wax casting" can also refer to modern investment casting processes. Investment casting has been used in various forms for the last 5,000 years. In its earliest forms, beeswax was used to form patterns necessary for the casting process. Today, more advanced waxes, refractory materials and specialist alloys are typically used for making patterns. Investment casting

7505-483: The other PING models had a special bend in the shaft located under the grip which was thought to give players a special advantage in the putting stroke. Acceptance came when Julius Boros won the PGA Tour 's Phoenix Open , using Solheim's "Anser" putter in early 1967. Later that year, Solheim resigned from G.E., moved his business from his garage to a factory and established Karsten Manufacturing Corporation (KMC) makers of

7600-507: The par calculation criteria, is called making "green in regulation" or GIR. Missing a GIR does not necessarily mean a golfer will not make par, but it does make doing so more difficult as it reduces the number of putts available; conversely, making a GIR does not guarantee a par, as the player might require three or more putts to "hole out". Professional golfers typically make between 60% and 70% of greens in regulation. Eighteen-hole courses typically total to an overall par score of 70 to 72 for

7695-409: The process. Investment casting is so named because the process invests (surrounds) the pattern with refractory material to make a mould, and a molten substance is cast into the mold. Materials that can be cast include stainless steel alloys, brass, aluminium, carbon steel and glass. The cavity inside the refractory mould is a slightly oversized but otherwise exact duplicate of the desired part. Due to

7790-426: The professional and top amateur level, as well as at high-level private clubs, players may be accompanied by caddies , who carry and manage the players' equipment and who are allowed by the rules to give advice on the play of the course. The rules of golf are internationally standardised and are jointly governed by The R&A , spun off in 2004 from The Royal and Ancient Golf Club of St Andrews (founded 1754), and

7885-447: The putter. Anchored putting, a style that requires a longer putter shaft that can be anchored into the player's stomach or below the chin; the idea is to stabilize one end of the putter thus creating a more consistent pendulum stroke. This style has been banned on professional circuits since 2016. A hole is classified by its par, which gives an indication of the number of strokes a skilled golfer may be expected to need to complete play of

7980-429: The required specification without the danger of breaking the clubhead as was the problem for previous models. Ping has maintained endorsement deals with many professional golfers playing on the leading tours , including Tony Finau , Viktor Hovland , Louis Oosthuizen , Sahith Theegala , Bubba Watson and Lee Westwood . Golf Golf is a club-and-ball sport in which players use various clubs to hit

8075-554: The right. This is commonly called a "dogleg", in reference to a dog's knee. The hole is called a "dogleg left" if the hole angles leftwards and "dogleg right" if it bends right. Sometimes, a hole's direction may bend twice; this is called a "double dogleg". A regular golf course consists of 18 holes, but nine-hole courses are common and can be played twice through for a full round of 18 holes. Early Scottish golf courses were primarily laid out on links land, soil-covered sand dunes directly inland from beaches. The word "links" derives from

8170-423: The round or tournament is added to produce the total score, and the player with the lowest score wins in stroke play . Stroke play is the game most commonly played by professional golfers. If there is a tie after the regulation number of holes in a professional tournament, a playoff takes place between all tied players. Playoffs either are sudden death or employ a pre-determined number of holes, anywhere from three to

8265-413: The stance, while a few mid- and short-iron shots are made with the ball slightly behind the centre of the stance to ensure consistent contact between the ball and clubface, so the ball is on its way before the club continues down into the turf. The golfer chooses a golf club, grip, and stroke appropriate to the distance: Having chosen a club and stroke to produce the desired distance, the player addresses

8360-471: The stopper is removed. This creates the greatest pressure differential to fill the moulds. The most common materials for vacuum casting process are the high nickel-based alloy and super alloys. Turbocharger products are a common applications for this casting process, though it is also regularly used in the manufacture of silver and gold jewellery. Investment casting is used with almost any castable metal. However, aluminium alloys, copper alloys, and steel are

8455-482: The top players used the PING putters during the televised event in Japan . In 1966, Solheim had an idea for a new putter flash in his mind. As he was unable to find a piece of paper, the design for his new putter was sketched on the dust cover of a 78 RPM record. After Solheim had finalized the design, he was still in need for a name. Solheim's wife Louise suggested the name "Answer" for the new putter as it "was an answer for

8550-408: The turning force. Weak wrists can also transmit the force to elbows and even neck and lead to injury. (When a muscle contracts, it pulls equally from both ends and, to have movement at only one end of the muscle, other muscles must come into play to stabilize the bone to which the other end of the muscle is attached.) Golf is a unilateral exercise that can break body balances, requiring exercises to keep

8645-495: The vexing problems in putting". As the name "Answer" would be too long to fit on the putter, the name was shortened to just "Anser". Additionally, without a W, Anser could be trademarked. PING faced a major obstacle at the end of 1966 as the USGA , golf's governing body for rules and equipment, outlawed all PING putters other than the Anser for tournament and handicap play. The decision came as

8740-415: The weight of the club head to the perimeter. The name "PING" came from the sound that Solheim heard as the metal struck the ball. Popular musician-golfer Murray Arnold shared in 1960 that the clubhead, on striking the ball, rings out with the 440 pitch used in tuning pianos. By the end of 1960, Solheim had 6 designs, intentionally muffled the "ping", and had made over 2,000 putters in his garage. In 1961,

8835-544: Was created at the Old Course at St Andrews in 1764. Golf's first major , and the world's oldest golf tournament, is The Open Championship , also known as The Open, which was first played in 1860 at the Prestwick Golf Club in Ayrshire, Scotland. This is one of the four major championships in men's professional golf, the other three being played in the United States: The Masters , the U.S. Open , and

8930-506: Was from Austrheim, outside Bergen ; as a toddler, he moved with his family to Seattle , Washington . Ping was the first manufacturer to offer high-quality cast clubs using investment casting which both reduced costs, allowed better quality control for high tech features, and set the stage for manufactured fitting. Ping was also the first to offer factory fitting, via a variety of clubheads in different lies and offsets. Beginning about 1980, Ping began offering their fitting program based on

9025-558: Was played annually in Loenen, Netherlands, beginning in 1297, to commemorate the capture of the assassin of Floris V , a year earlier. The modern game originated in Scotland , where the first written record of golf is James II 's banning of the game in 1457, as an unwelcome distraction to learning archery. James IV lifted the ban in 1502 when he became a golfer himself, with golf clubs first recorded in 1503–1504: "For golf clubbes and balles to

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