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Ken Tannar, PGI Creator

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Feb/Mar PGI Contest

For Feb/Mar, the winner will receive a $50 credit towards anything sold from my site. Download any of my PGI Golf Tips or Reports. Buy a copy of the CD, Hit Down Dammit!, a supply of CaddyPatch Impressions, Swing Machine Golf, or Swing Speed Detector .

After you make a purchase, just email me a message at probablegolf@yahoo.ca with the subject heading, "PGI Member." You need to be a newsletter subscriber to qualify.

Congratulations to Dr. John Garvey of Australia who won the Dec/Jan $50 prize.

You owe it to your game to make the best of your abilities; become " Master of Your Own Game". Stand out and improve, even without hitting any balls!!

Here's to a long lasting life of great golf!

It's exciting that another season is now in full swing with all the tours in action.

A Brief Message      Feb 7/05

  • Congratulations to Justin Leonard for winning the Bob Hope Desert Classic.
  • My last newsletter revealed my view on what golfers should focus their money on to improve. And, for those that want the easier route, I made some suggestions for new equipment! Click here. This newsletter is about new golf balls and dimple patterns.
  • I have an ebook I'd like to suggest to you. It's called "Think and Grow Rich." At first, I thought it was going to be all about making money. As I've read it, though, I've found the ideas can be applied to many situations in everyday life. I've found it quite inspirational. You can get your free copy HERE.


    Order yours here
    Receive a free copy of "How to hit the Longest Golf Ball Using New Golf Club Technology"

    View the left hand side of this page for some other great golf gift ideas. Get some great golf books from amazon.com. View my recommended golf science books.


Off Season Golf Part 5: Do Dimples Make Difference?

Read other Parts from the Technology & Distance series and Short Game series here, Archives.

Email me if you'd if there's anything you'd like to see discussed or analyzed in the next or future newsletters. Now on to this week's topic.

V. Do Your Dimples Make a Difference?

    The topic of this newsletter is golf ball dimples. Do the different dimple patterns on the various golf balls actually make a difference?

   Firstly, having a dimpled golf ball is essential to hitting it long. A well hit dimpled ball would fly about 250 yds, while a smooth ball would only fly about 100 yards. The dimples reduce the amount of air drag on the ball so that it remains in the air longer and flies farther.

   In 2001, Beasley and Camp of Clemson University conducted a study to investigate golf ball dimples called "Effect of Dimple Design on the Aerodynamic Performance of a Golf Ball." It was published in Science and Golf IV of the Scientific Congress of Golf.

   Beasley and Camp investigated a dimple pattern used my some Dunlop and Slazenger balls; the pattern has 392 dimples, having two different sizes. The measured the amount of lift and drag on the various balls and then used those values to simulate how far the balls would fly.

   The dimple diameters of the balls did not differ significantly, but the dimple depths did. The depths of the dimples varied from 0.188 mm to 0.208 mm. The distances of the balls ranged from 225 yards to 239 yards. The greater distances were correlated quite strongly with the shallow dimple depths. The balls with deeper dimple depths, flew higher and did not carry as far.

    On the market, there are hundreds of different balls, that have widely different dimple patterns. Some balls are advertised as low trajectory and some as high trajectory. The ball that is high trajectory could have deeper dimples or could just spin more, thus have greater backspin. Ball manufacturers don't provide many of the specifications of the balls clearly.


  How far a golfer hits the ball depends on ball speed, backspin and initial trajectory angle. A golfer that already hits the ball high, may benefit by hitting a low trajectory ball (low spin and/or deep dimples). A golfer that already hits the ball low, may benefit by hitting a high trajectory ball (high spin and/or shallow dimples). For you? You'll need to experiment. 

    If the conditions are windy, a low trajectory ball will keep the ball from being as greatly affected by the wind.

    Unfortunately, manufacturers don't specify the depths of their dimples so it's difficult to determine which balls truly fly lower. Suffice to say, however, that for most golfers, the difference between playing low trajectory and a high trajectory balls is not that great. Long ball hitters would realize the greatest difference.

    Don't concern yourself about the number of dimples on the ball. There isn't a significant difference in the effects of the number of dimples (i.e 392 vs 450). Ball manufacturers wouldn't produce a ball with an "inefficient" number of dimples.

If you are more interested in finding out which golf ball is best for you and your game, consider the following:

Longest Golf Ball Report -- a statistical analysis of different golf balls hit by an
                                    Iron Byron Robot machine.

Discover the secret "missing link" in your golf game. Understand which golf balls REALLY make a difference in each stroke!

I'll provide some more suggestions about new technology in my next newsletter.

A list of resources that have been used to produce this newsletter can be found on my website here.

The focus of my site is to utilize science and math to lower your score. New technology is one way to achieve this, but to be honest, the technology is one small piece of the puzzle.

To actually improve significantly, we all need to:

1. Improve our swings using CD Interactive, Hit Down Dammit!

2. Learn how to swing simpler like the Iron Byron with the great coffee table book, Swing Machine Golf!

3. Improve our physical fitness and strength.
The Golf Trainer Power Performance Programô
and Ultimate Golf Fitness Ebook

4. Improve our mental games. Golf Mind Software

5. Improve our Probable Golf games. Learn how to make better choices on the course through knowing how shot patterns and reading the elements and course better.

Click on the links above to take a look at ways that I personally use myself and recommend you try as well.

Hope I provided some useful ways for to become better prepared for you best golf season ever.

Ken Tannar

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