Golf ball

People have used many kinds of balls for golf.

Long ago, some balls were made of wood. Others were leather bags filled with feathers.

These feather balls were very hard to make. Making just one took a long time. Later, people used sap from a tree. This sap was easy to shape.

Today, balls have tiny holes called dimples. These dimples help the ball fly far and straight. It is fun to see them fly!

Golf is a game played with a special ball.

Rules say the ball must be a certain size and weight. It must also be a round shape.

Early balls were very different from what we see now. People once used hard wood. Others used leather bags filled with feathers.

These were called featheries. They were hard to make. One ball could cost as much as twenty dollars today.

Later, makers used sap from a tree. This was called a guttie. People found that tiny nicks on the surface helped the ball fly. This led to dimples. Dimples are small holes on the ball. They help the ball fly far and straight. They also help the ball spin.

Modern balls use new materials like resin. Some have many layers. Others have one solid core. Companies like Titleist and Callaway make many types. Some have round dimples. Others have shapes like hexagons. These shapes help the ball move through the air. Some new balls are even made from cornstarch to help the earth.

A golf ball is a special tool used in the game of golf. It must follow strict rules to be used in contests. These rules are set by groups called the R&A and the USGA. A legal ball cannot weigh more than 1.62 ounces. It also cannot be smaller than 1.68 inches in diameter. The ball must be a round, symmetrical shape. This ensures that every player has a fair chance to play.

Making golf balls has changed a lot over many years. Long ago, people used hard wood from trees like beech. Other players used leather pouches stuffed with feathers. These were called featheries, and they were very expensive. A single featherie could cost the same as $10 or $20 today.

Making them was a slow and hard job for makers. An expert could only finish a few balls in one day.

In 1848, a man named Dr. Robert Adams Paterson changed things. He invented the gutta-percha ball, which people called a guttie. This ball was made from dried sap from a Malaysian tree. It was cheaper and easier to shape using heat and molds.

People noticed that nicks on the surface helped the ball fly better. Makers started using tools to carve patterns into the surface. These textured balls were called brambles because they looked like blackberry fruit.

Another big change came in 1898 thanks to Coburn Haskell. He discovered that winding rubber thread into a ball made it fly high. This led to the wound rubber ball used for many years. These balls had a core covered in a shell made of balatá sap.

Later, makers added dimples to the surface. Dimples help the ball fly farther by reducing drag. They also create lift through something called the Magnus effect. This helps the ball spin and stay in the air longer.

Today, we use very advanced materials to make golf balls. Many balls use synthetic resins like Surlyn or urethane covers. Some balls have one solid core, while others have many layers.

Companies like Titleist and Callaway design different dimple patterns. Some use circles, while others use hexagons to move through the air. There are even new balls made from cornstarch to help the earth. These modern balls are much tougher and more reliable than the old ones.

A golf ball is a precision-engineered object designed for the game of golf. To be used in official competitions, a ball must follow strict regulations set by two governing bodies: The R&A and the United States Golf Association (USGA). These rules ensure that the equipment remains fair for all players. According to the rules, a conforming ball must have a mass no more than 1.62 ounces. It must also have a diameter of at least 1.68 inches. Furthermore, the ball must be spherically symmetrical, meaning its shape and its dimple arrangement must be balanced.

The way a golf ball moves through the air is a complex process of physics. When a club hits the ball, the impact lasts less than one millisecond. This brief moment determines the ball's velocity, launch angle, and spin rate. As the ball travels, it encounters two primary aerodynamic forces: lift and drag. Lift is an upward force that helps the ball stay airborne. Drag is a force that resists the ball's forward motion. Modern engineering focuses on balancing these forces to create the perfect flight.

Dimples are essential components that manage these aerodynamic forces. A smooth ball experiences high pressure drag because of a wide, low-pressure wake behind it. Dimples change this by causing the boundary layer of air to transition from laminar to turbulent. This turbulent boundary layer stays attached to the ball's surface longer. This creates a narrower wake, which reduces drag and allows the ball to travel further. Additionally, backspin creates lift through the Magnus effect. This effect deforms the airflow around the ball, much like an airplane wing, to increase lift.

Historically, golf balls were made from simple, biodegradable materials. From the 14th through the 17th centuries, players likely used hard wooden balls made from beech or boxwood. It is also possible they used leather balls filled with cow hair. Later, the "featherie" became popular. This was a hand-sewn leather pouch stuffed with boiled chicken or goose feathers. Because making them was so tedious, they were very expensive. A single featherie could cost the equivalent of US$10–$20 today.

In 1848, Dr. Robert Adams Paterson introduced a major change with the gutta-percha ball, or "guttie." This ball was made from the dried sap of the Malaysian sapodilla tree. The sap was heated and shaped in a mold to create a sphere. Gutties were cheaper and more durable than featheries. Makers eventually discovered that surface nicks improved flight consistency. This led to the creation of "bramble" balls, which had intentional indentations carved with knives or chisels.

A massive breakthrough occurred in 1898 when Coburn Haskell developed the wound rubber ball. This design featured a core of liquid or solid rubber wound with rubber thread. The core was then covered in a shell made of balatá sap, a viscous material from trees in Central and South America. In the early 1900s, manufacturers began adding dimples to these wound balls. This allowed players to use more lofted clubs to create backspin. This spin helped the ball stop more quickly once it reached the green.

Modern golf balls utilize advanced synthetic materials and complex layering. In the mid-1960s, materials like Surlyn (an ionomer of ethylene acid) and urethane blends replaced the soft balatá sap. These new materials are much more resistant to being cut by clubfaces. Today, balls are classified by their layers as two-piece, three-piece, or four-piece designs. Companies use specific dimple patterns to achieve different goals. For example, Titleist Pro V1 uses a 388-dimple design for aerodynamics. The Taylormade TP5 uses circular and hexagonal dimples to reduce drag. Callaway uses a hexagonal design for straighter flights.

Technological shifts have also changed how balls are constructed internally. Early liquid-core balls sometimes contained caustic liquids that could cause injuries. By the 1970s, some liquid cores contained crystalline materials that could cause injuries if the ball exploded during dissection. In 1967, Jim Bartsch patented a solid golf ball design. Spalding later used chemical engineering to create a resin that allowed for solid-core "2-piece" balls. While most players now use these durable solid cores, some new biodegradable options are appearing. These include balls made from wood, cornstarch, or even lobster shells.