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Ken Tannar, PGI Creator

Golf in Canada


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        Probable Golf Instruction

Monitor your swing improvements with Radar.

Swing Speed Radar -- Tap HERE

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May/June PGI Contest

To register for the newsletter contest, all you need to do is visit this page and enter your name and email.

Congratulations to Robert Ruby of The Woodlands, TX for winning the April prize of $50 off the new BreakMaster for measuring the slope of the green. He has the option of also ordering the Laser Putting Alignment System.

The May/June prize is $100 off any product I sell from my site, such as the BreakMaster for measuring the slope of the green. It comes with a great DVD that explains how a putt breaks and how the BreakMaster can be used to greatly improve your putting.

Refer friends to my newsletter, and you'll be entered as many times as the number of friends you refer.

Just submit the name(s) of your friend(s) on the registration page.

Download any of my PGI Golf Tips or Reports. Buy a copy of the CD, Hit Down Dammit!, the new BreakMaster for measuring green break, or Swing Speed Radar Detector or anything else, and you'll be entered once for every dollar value of your purchase.

We golfers are always losing balls. But sometimes in life, we lose more important things. Here's a way to make some new golfing friends.

Custom Clubs w/ Patented Shot Alignment Tecnology

For a great video of the alignment process, click HERE.


A Brief Message      May 29 /07

  • Congratulations to Rory Sabbatini for winning the Crowne Plaza Invitational, beating out two veterans, Jim Furyk and Bernhard Langer in a playoff.
  • My last newsletter I summarized my experience with 1 Iron Golf Clubs; the irons I told you about a few months ago that all have the same shaft length. As well, some great stats on the backspin of various golf balls on the market. View the previous newsletter here.
  • This newsletter is loaded with lots of facts that debunk the myths about golf and golf technology.

  • Featured Product

    There's much more to learning this game than hitting it long and straight.

    Tour quality putting will teach you how to read greens, read speed, develop and simple, consistent stroke, a sink more putts.

    Tour Quality Golf

    Tour quality putting will teach you how to read greens, read speed, develop a simple, consistent stroke, and sink more putts.

    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.

    Golf Laser Putter
    Laser Putting Device

    There are other laser putting devices out there that cost over $100. The one above works great and is only $50.

Golf Physics & Technology -- Myths and Facts

Send me any suggestions you have for the next or future newsletters. Just submit your ideas using this simple form.

    There are lots of apparent "facts" out there about golf and golf technology. Unfortunately, many of them are only "myths" some of which have been propagated by golf club & ball companies in their advert campaigns (some out of ignorance and some intentional stretching of the truth).

If you have knowledge of any "myths" that I haven't mentioned, please email me and I'll include them in the next newsletter.

MYTH #1: Golf Ball Distance doesn't vary much with Temperature

Golf ball distance depends on air temperature as well as golf ball and club temperature. Once in flight, the air density determines how much air friction resists the ball flight. Air density decreases as temperature rises. In fact, you'll realize about 2 yards more for every 10 degree Farhrenheit increase in temperature. The difference between 50 and 80 degrees is about 6 yards; that's a at least half a club. Longer ball hitters will notice a more significant difference. The carry distances in the table below are in yards.

Temperature (degrees F)
Driver 110 mph
Driver 100 mph
Driver 90 mph

The difference in distance also depends on the trajectory of the shot, so the various different lofted irons are affected differently. I can calculate your own unique distances using my mathematical golf ball projectile model. Take a look HERE.

When the ball and club are colder, they both compress differently than when warm. The resulting COR is less when cold and there is a higher energy loss in the collision. The result is less ball speed and thus less distance. When playing in cold weather, try to keep your golf balls warm (keep three in your pocket and alternate them between holes).

MYTH #2: Longer Golf Shafts produce more distance.

As I've discussed in two previous newsletters (including the last one, newsletter here ), the length of the shaft does not make a significant difference to clubhead speed. For instance, a Driver that is 1 inch longer might give you 1% more clubhead speed (depends how your swing is affected by the increased length), but you'll also increase the likelihood of missing the sweetspot. Missing the sweetspot by a mere 1/4 inch will cause you a much larger loss in distance than a 1% increase in clubhead speed. You can learn much more about new club technology HERE.

MYTH #3: Iron grooves greatly influence the amount of backspin.

Can't back it up on the green?. Think those "square grooves" will enable you to do so. Sorry. It's clubhead speed and angle of attack (Hit Down on the Ball Dammit) that makes the most difference.. The loft of the club and the roughness of the face produce the spin on the ball.  Studies over the last 25 years using identically lofted clubheads, with and without grooves, produced the same relative amount of backspin.   It should be noted, at very slow clubhead speeds, such as those generated by a short pitch shot, it is possible for grooves (in particular square grooves) to generate a noticeable amount of backspin over the same club without grooves.  At the slower speed of a short pitch shot the ball slides so little up the face that it can be grabbed by the edges of the grooves.  So keep your clubs clean and the faces rough. Oh, and make sure your clubs are dry; water greatly reduces backspin.

MYTH #4: Clubhead speed is the sole determiner of Driver distance.

Driver distance is dependent upon clubhead speed, loft, angle of descent/ascent of club, location of the club's center of mass and the golf ball. Yes, more clubhead speed with a given club and ball will yield more distance. But to optimize distance, there is an ideal combination of all these factors for your clubhead speed. Lower speed swings need a higher loft to maximize distance. Ideally, the club should contact the ball at the bottom of its arc or on the upswing. To determine your optimum combination, you need to get yourself tested with a launch monitor trying different drivers.

Ball Speed in MPH
Optimal Launch Angle in degrees
 Optimal Backspin Rates in RPM’s
14 to 16
3500 to 3800
13 to 15
3300 to 3550
12.5 to 14
3000 to 3300
12 to 13.5
2750 to 3200
11 to 12
2500 to 2700
9.5 to 10.5
2350 to 2600
8.5 to 10
2000 to 2400
7 to 9
1950 to 2150
6 to 8.5
1700 to 2000

MYTH #5: PGA Tour Pros sink 80% of their 6 foot putts.

PGA Tour Pros only sink less than 60% of their 6 foot putts. Why does it seem they sink so many more? Because ususally the ones you're watching on TV are the leaders, and they're sinking a higher percentage of their putts; that's why they're the leaders. Click HERE for a graph of percentage putting.

The major cause of missed putts amongst amateurs is alignment. Amateurs don't align their putter faces properly. They either aim a little left or right. Angling the face 1 degree left or right will result in a missed putt unless the stroke compensates. Practice your alignment to improve your putting.

Golf Laser Putter
Laser Putting Device

There are other laser putting devices out there that cost over $100. I use the one above, itworks great and is only $50.

Here are some stats on the number of putts in an average round. Just think how many strokes you'd shave off your score if you improved your short putt percentage by a mere 10%. You can do so. It's within your reach. All amateurs can significantly improve their putting.

PGA Tour
0-5 Hdcp
6-10 Hdcp
11-15 Hdcp
16-25 Hdcp
# putts of 5 ft and less per round
% of total putts

The above stats are compliments of SHOT by SHOT.

If you want to track your full game, there's a great golf statistics analysis software called SHOT BY SHOT. I've made arrangements for a $34 discount off the annual subscription rate. And, you can try out the software first if you like. What I like so much about this software is that it compares your game to a huge database of other golfers (over 35 000 rounds).

Click here to learn more and/or order: SHOT BY SHOT Full Game Analysis

 The simplest, most effective analysis of your entrie golf game.Great Golf Game Analysis


Trying to find answers on my website? Here's how.

1. Go to my Frequently Asked Questions (FAQ) page. There's a link to it on my pages from the left hand menu near the top of the page, just below the Search icon. It's called "FAQs." You then click on the graphic icon and you'll be taken to my database page. For your convenience, here it is:

I've answered hundreds of questions over the past 6 years and have created a fairly large database. You can search it out. If you can't find the answer you're looking for, submit a question and I'll answer it.

2. On all of my web pages, there is a search feature in the top left section, right underneath my LOGO. Just place your search keywords in the search box, select "This Site" below it, and then press "Search." What will come up is a Google search of the pages on my site with relevance. You can also search the entire internet by selecting "Web" instead.
Go to my main page now: Home or just check the top left menu of this page.

3. Also, directly under the Google Search area, you'll find a pop down menu called "Your Topic." Select the topic of interest and press "Go."

I would suggest you bookmark my main page and/or your specific areas of interest so that you can find them easily in the future. On each page at the very top, there is a link you can click on:
"Click here to add this page to your favourites"

Hope you find all you're looking for.

You can learn more from NEW Titleist Pro-V1 by clicking HERE.

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

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

Ken Tannar

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