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A little history of Bell Helmets!
Do you know that the company that makes Bell helmets did not start out making helmets? It was a company that sold auto parts -- Bell Auto Parts -- started by George Wight in Bell, California, in 1923. In 1933, Rogy Richter went to work for Wight....
“Bodybuilding Sins” That Cause Back Pain and Missed Workouts: Part 3
“Bodybuilding Sins” That Cause Back Pain and Missed Workouts: Part 3 by Jesse Cannone, CFT, CPRS and Steve Hefferon, CMT Welcome to article number 2 in our series “Bodybuilding Sins That Cause Back Pain and Missed Workouts”. In this article we are...
Finding Quality Batting Cages for Sale
Batting cages are an essential tool for any softball or baseball
organization. They are used both by batting coaches and by
recreational athletes to help improve a batter's speed or to
improve his or her accuracy in hitting a ball. However,...
My God...It's Full of Stars!
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Traditional Wooden Baseball Bats
Wood baseball bats are available for all leagues and levels. Some believe wood baseball bats embody the art or the poetry of baseball. Precision crafted wood bats are replete with the spine-tingling crack of a home run or the splintered remains of...
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In baseball, how does a pitcher throw a curveball?
In baseball, how does a pitcher throw a curveball?
A successful major league batter gets a hit only 30 percent of the time he comes to bat. One of the ways pitchers lower these chances even further is by throwing a curveball. A curveball is a pitch that appears to be moving straight toward home plate but that is actually moving down and to the right or left by several inches. Obviously, a pitch that curves is going to be harder to hit than a fastball that is moving straight.
There are two basic factors involved in creating a curveball:
Proper grip
Air resistance
Any baseball pitch begins with how the pitcher grips the ball. To throw a curveball, a pitcher must hold the baseball between his thumb and his index and middle fingers, with the middle finger resting on the baseball seam. When the pitcher comes through his motion to throw the ball, he snaps his wrist downward as he releases the ball, which gives the ball topspin. If the pitcher throws properly, the back of the his hand will be facing the batter at the end of the motion. The ball will break down and away from a right-handed batter if thrown by a right-handed pitcher.
The spinning action created when the
pitcher releases the ball is the secret behind the curveball. This spinning causes air to flow differently over the top of the ball than it does under the ball. The top of the ball is spinning directly into air and the bottom of the ball is spinning with the air flow. The air under the ball is flowing faster than air on top of the ball creating less pressure, which forces the ball to move down or curve. This imbalance of force is called the Magnus Effect, named for physicist Gustav Magnus, who discovered in 1852 that a spinning object traveling through liquid is forced to move sideways.
Adding to the air pressure exerted on the ball are the 108 red stitches that hold the cover on the ball. Because they are raised, the stitches increase the amount of friction created as the air passes around the ball and places more air pressure on top of the ball. A well thrown curveball can move as much as 17 inches either way. If you've ever seen a batter jump out of the way of a baseball that ends up crossing over the plate, you've seen a good curveball.
About the author:
http://www.a1-baseball-4u.info/
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