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bitiandeni122010-02-14 22:10:16 +0000 #1
"Although I can not know much about golf, but I think that the future of my efforts will certainly be a better understanding of it and do it." How to say these words in English?
people's simulation program2010-02-14 22:17:22 +0000 #2
is the kind of circular groove

sizes generally have a 400 groove ball around

Golf (Ball) is a texture hard, flexible, solid white ball. There are also yellow, red ball, a personal favorite. The diameter of the ball shall not be less than 42.67mm, the quality may not exceed 45.93g, the standard ball for 75m / s.

If you get too once made golf, you will find golf balls covered with a small groove. Do you know what the role of these small grooves do?

In fact, these small grooves can reduce the air resistance and to provide lift, so that golf balls fly farther. A smooth surface of the golf, hit by the professional players, the flight distance of the surface covered only about half of the ball groove.

Ball flight path will be gravity (the weight of the ball itself), and the impact of air resistance. Therefore, how to reduce the air resistance will be the key.

The air for any movement in which the objects (such as golf) would dictate; try to shake out your hands, you feel the air resistance. Aerodynamics home (research scientists, the air flow) to the air on the movement of objects dictate divided into two parts: the lift and drag. The role of the direction of drag force and movement in the opposite direction, while the lift of the role of the direction is upward perpendicular to the direction of motion.

A high-speed flight of golf, its front there will be a high-pressure zone. Air flows through the ball behind the leading edge of re-flow will be separated with the ball. At the same time, the ball will be a turbulent wake behind the zone, undulating flow disturbance in this region, resulting in pressure on the rear lower; the end of the range will affect the flow drag force size. Allows the air to form a small pit close to the ball form a thin layer of turbulent boundary layer, making a smooth air flow over backward to go down the ball some, while reducing the scope of wake, it is suffered by the drag the ball pit force, only about half of the smooth sphere.


When the ball spins, would, like airplane wings to generate lift as air deflection, while the ball can spin the ball under pressure higher than the above, this imbalance can produce a bottom-up thrust. Golf spin provided about half of the lift, while the other half came from a small cavity, it can provide the best lift.

Golf ball is the main body of golf equipment. Golf ball is round or ancestor is said to oval-shaped stones, and later through the hand-carved wooden ball. Some researchers even believe that golf history, early golf is made of beech wood, the kind of trees in northern temperate zones in Western Europe is more common.

There are written records of the earliest feather golf ball should be (featherieball). This ball is a few patches of skin dermis (mapi or leather) sutures made of. In the production, it will be boiling over into the wet feathers fill hemisphere, and then stitched the two hemispheres. Suture, the skin will be shrinkage of the ball, ball slightly smaller; only after Seiko craftsman hand stitching will achieve better roundness. As an artisan sewing only a few balls a day, so hand-expensive, sometimes as high as over a club. Feather-made golf available from the 17th century, has experienced the process of around 200 years before "mission accomplished."

As mentioned earlier, changes in the material sphere direct impact on its performance, but also requires matching clubs. Therefore, the ball itself, the development of situation has also brought the ball with the relevant development, and even golf course design should be corresponding. Feather ball has been used into the mid-19th century, some people use this ball shot at St Andrews Old Course had 87 achievements, it should be noted that the feather golf in the rain system will become soft, and therefore not easy to use. Nevertheless, some historians and even golf textual out it had from 1400 to 1850 was used four centuries. Around 1840, people began experimenting with the use of a rubber ball.

In 1848, a process known as gutta-percha balls (gutta percha) for a new generation of golf on stage, be regarded as epoch-making event in the history of golf. The main material gutta-percha ball gum derived by the ancient tower, after a "harmony" that the material on the highly flexible. In the system, the ball the process, it is easy to be pressed into ball, hard texture after cooling. Gutta-percha of the production costs significantly lower than the feather ball, so that more people can play play golf.

Thus, this new golf ball has brought breakthrough development. Gutta-percha ball in the production and improvement of the process begun to focus on "standardization" that is produced by the ball in size and weight, etc. should be made gradually meet certain specifications. This new material easy to shape the ball is part of its pursuit of normalization premise. There is another advantage of gutta-percha ball, the ball once it hit the body deformation or rupture, but also to restore original shape after melting, so that damaged the ball back from the dead. Golfers have proven concluded: Renewable ball and sometimes completely smooth-to-earth than the original ball has a better flight performance.

At first, players were all using the smooth spherical ball, and later found to have spherical but with better lines, which was deliberately added in the production of homogeneous or tap into shape as needed, according to the St. Andrews Old Course preservation historical records, a. Robertson (allan robertson) 1858 Nian gutta-percha ball with this shot a 79 record of success. Generally speaking, when the gutta-percha ball, weighing about 1.3-1.5 ounces (Note: 1 ounce = 28.349 grams), slightly lighter than today's golf. Sphere with a small protrusion (pimples) of the ball has been called "European ink berry" (bramble).

1900 on the eve of, a new declaration of the ball has been popular for many years to replace the hard rubber gutta-percha balls (gutty). c. Haskell (coburn haskell) during a visit to the United States Akron, Ohio, a rubber factory, after being inspired by, decided to create a rubber-core ball, that is, using a thin rubber to winding up a small plastic ball protruding coat. In 1989, Kazakhstan period of Kerr and reported the successful development of a patent. The advantages of this new ball is very prominent, more than the previous ball can fly 20 meters away. And easy to control.

Despite the emphasis has always been traditional for the player say Haskell golf ball changed the game features, but the first one triggered Haskell inspiration Goodrich Rubber Company was launched to produce the new ball. In 1901, Walter Travis (walter travis) to use this new ball in one stroke to win the U.S. Amateur champion, defending successfully. The following year, Kazakhstan period of the ball Kerr British Isles, Britain's Hill Di Hede (sandy herd) using the new ball in gooimeer Royal Liverpool golf course obtain British Open champion, defeated already using the old ball, as three times winner of the famous Harry Vardon (harry vardon). Since then, the Haskell ball was a firm foothold, and the end of the ball who is superior to the old and new arguments.

For the Haskell ball, people have been moving to experiment with a view to be improved. As a result, the updated surface of the ball to the ball dents (dimples) instead of the small protrusions, so that good results can not only maintain the same aerodynamic properties, but also can give the ball to be more precise. The original sphere of small protrusions cause he missed the ball. Have adopted today's standards, the surface of dent-type golf ball's diameter and depth are different, brands vary, but the difference was very small. Manufacturers in the promotional war, often with special emphasis on the differences due to different flight performance. Experts in the wind tunnel to test the aerodynamic properties of the ball, the principles similar to the test an airplane wing. Golfers hit the ball, each ball to obtain a backward rotation of force, which is closely related to the dent, as if the bottom of the ball to form a thick, like air pillow. Some people tried to play the ball can only be smooth flying 65 meters away, there is dent the ball can be hit 275 meters far.



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