Custom Search

Home

Order Golf Tips
 

 

 

Engraved Ball Marker, Divot Repair Tool, Hat Clip
    ·Ball Marker Engraved

Engraved Ball Marker, Divot Repair Tool, Hat Clip

 

Send to Friend

 

Mental Game

Golf Draws
Golf Fitness
Ask the Expert
FAQ
Calculate Handicap
Newsletter Archive
Trajectory Software

 

 

 

Will Tiger Beat Jack's Record?

 


If you're a visitor, Subscribe to the Probable Golf Newsletter, or, sign up a friend. He/she will be sent a verification to opt in email.

First Name:
Last Name:
Email:
Handicap:

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

 


 

 

 

 

 

        Probable Golf Instruction

 

May 2014

Add this site to your favourites!

 

Click on any of the following Newsletter topics or just scroll down the page:

Maximum Height Same for All Clubs

New Technology Trampoline Effect for Distance

Cool Mornings -- Hot Afternoons

New Social Golfer Foursome Pairings Solved

 




Click HERE to order yours now.

$149.95

Swing Speed Radar with Tempo Timer

 

$119.95

Swing Speed Radar

Purchase a Swing Speed Radar and I'll throw in a complimentary pair of Putting Glasses AND Swing Like a Genius T-shirt. Both are valued at $29.95.

IT'S NOT HOW HARD YOU SWING, BUT How well you sequence your swing!

The  Swing Speed Radar®  is a small, affordable microwave Doppler radar velocity sensor that measures the swing speed of golfers.

    • Optimize your clubhead speed with your own personal  Swing Speed Radar®  as you practice on your own in the backyard, garage, basement, etc, as well as on the driving range or during practice rounds.
    • No need to hit an actual golf ball -use a wiffle ball, Birdie Ball, sponge ball or equivalent to simulate a real ball, but swing at a ball replica to release the club properly.
    • No need to attach device(s)to the clubhead or shaft.  Use any club-switch clubs conveniently and keep swinging.

 

Trajectory Height Same for All Clubs

Would you believe that you hit your Driver as high as your full pitching wedge? Doesn't it seem like you hit your wedge much higher? It's all perception.

In fact, you hit each club in your bag (with a full swing) about the same maximum height. Why is this? And why does it appear that you hit your short irons so much higher than your longer clubs?

Take a look at the PGA Tour Average Statistics below. Observe how the maximum height for each club is about the same. The LPGA Tour Average heights have a similar pattern except the heights are less.

 

 

It all has to do with what you are observing. What's very different between your Driver and full wedge is the launch angle. The full wedge trajectory has a much greater launch angle. Therefore, the ball climbs to its maximum height in a much short distance. The Driver trajectory climbs gradually. Once the ball is at its peak, it's a long ways away, and therefore it appears to be low.

It's much like a distant mountain. It appears to not be very high because it is a long ways away and low on the horizon. But, from experience, your know it is high. Likewise other objects at a distance such as trees and buildings appear very low on the horizon, but you know there are actually high.

A golf ball launched by a short iron like a wedge climbs very quickly, thus it is very high relative to the horizon. You need to be looking more upwards, at a greater angle, to follow its flight than the flight of the Driver. The angle at which you need to look up is greater.

Look at the trajectory graph below. The 3 trajectories are average PGA Tour trajectories as determined by Trackman. The various values such as maximum height, carry distance, launch angle, etc are consistent with the Trackman data above.

Take a look at the trajectory graph below of just the 5-iron and 9-iron trajectories. The trajectory that carries 200 yards is an average 5-iron trajectory for a PGA Tour player. I've marked on each trajectory the angle above the horizon as seen by the golfer during each second of flight.

 

So, after 1 second, the 9-iron is higher but has travelled less distance (because the ball is not moving as fast as when struck with a 5-iron). Thus, the angle you need to look up at is significantly greater: 20 degrees for the 9-iron and 13 degrees for the 5-iron.

At the 2 second point, the 9-iron angle is about the same, but by 3 seconds, the angle is less at about 13 degrees so it appears that the ball is now falling, while in fact, it's at its maximum height. The 5-iron ball can be seen at 14 degrees, just before it reach maximum height.

Note that between 2 and 4 seconds, the 9-iron angle changes as 20-18-13 while the 5-iron changes as 15-14-11. The 9-iron angle changes more quickly. The 5-iron angle is more steady. The Driver angle, in comparison, is even more steady, hardly changing at all, thus the ball appears to just hang there in flight.

So, there you have it. Another "golf myth" revealed for what it really is. So, next time you hit the high full wedge shot, remember, it's not any higher than your other clubs, it just appears to be because of your perspective of the angle of the ball above the horizon.

Other than curiosity and the need to know, how helpful is this fact of trajectory height for your different clubs. Well, consider choosing a club to hit over a tree. You can hit over the same height tree with a 5-iron as a 9-iron; you just need to be further back with a 5-iron. Knowing where your peak trajectory is for you various clubs is really important when you're trying to clear trees. I'll have more on this in my next newsletter.

Disclaimer: Now, the maximum height for your clubs might not be as clustered as those of the average PGA Tour player. You might actually some of your irons higher due to your swing. PGA Tour players hit their irons with a descending blow (club is moving downwards at impact). You might "scoop" your irons more, releasing your wrists more quickly and increasing the loft of the club. Plus, let's face it, your launch angles (and therefore peak heights) are probably not very consistent. One shot goes high, then low, then really high, .......

If you have access to a club monitor (like a Trackman or Flightscope), see if you can get a profile done of your trajectories. What are your launch angles? maximum heights? etc.

Cool Mornings -- Hot Afternoons

Now that summer is here, we can have some major temperature changes between morning and afternoon, especiallyif you find your self in a desert like region. Temperatures can be 50 to 60 degrees at dawn and then 100 to 110 degrees Fahrenheit by afternoon. Hotter temperatures mean the ball will fly farther (and roll farther) compared to the cool mornings. So, make sure you adjust by at least 1/2 club with your irons.

You can use my Golf Club Distance Temperature Calculator to calculate the exact effects.

 

Clubs that use the Trampoline Effect

There is no disputing that technology in recent years has increased how far golfers can hit the ball, especially the professionals. There is countless stories of older PGA players hitting the ball in their later years the same or farther than when they were playing in their youthful prime.

There have been improvements in the golf ball as well as the golf club. This newsletter will focus on the improvements in the golf club. Check out my last newsletter for more on the golf ball.

The significant gain in distance with the Driver came with the invention of hollow, metal face "woods." The hollow metal made possible a "trampoline effect" with the impact of the club face on the ball. This in effect increased the collision time between the club face and the ball (although still very short in the order of micro-seconds), which increases the efficiency of energy transfer, resulting in higher ball speeds.

 

The measure of efficient transfer is call the coefficient of restitution, or COR. As soon as manufacturers realized the effect, they began to experiment with larger club faces (thus increasing the trampoline effect), so much so that the USGA had to place a limit on it. The old wooden Drivers had CORs on the order of about 0.75 (75% efficiency). The limit set by the USGA is 0.83 (83% efficiency).

Imagine yourself jumping on a trampoline. The flex of the trampoline tarp enables you to bounce and gain significantly more height, especially from the center. Move off towards the outer edges, and the effect is not as greater, plus, you are forced towards the center of the trampoline instead of straight up.

This is an exagerated image of how much the club face flexes as the ball collides with the face.  

With the larger faces also came further distance on mis-hits (when the ball doesn't make contact with the sweet spot of the Driver). Effectively, the sweet spot size was increased, which really benefited those that have the greatest number of mis-hits (higher handicappers). So, distance gained on sweet spot shots and on mis-hits, thus the average distance increase.

Low Handicap Misses Mid to High Handicap Misses

Research with golf robots has shown that there is a significant loss in distance when the ball strikes even 1/4 inch away from the center of the sweetspot, especially when towards the toe of the club. Below is a graphic which shows those losses for a 100 mph swing speed.

Manufacturers today are experimenting with variable thickness club faces to increase the sweet spot even more. This is most beneficial to higher handicap golfers.

So, if you haven't bought a new Driver in the past 5 years, I'd suggest you do so this year, even if it'one of last year's models. But, make sure you test some Drivers using a golf ball monitor (such as Trackman or Flightscope), because the launch angle and amount of backspin is crucial for maximizing your distance (this is influenced with weight placement in the head to alter the center of gravity).

 

 

Proper alignment can be learned. It can be mastered. You just need to know how you're aligning. You need a measuring tool to let you know.

You need a Laser Putting Alignment System.

Take a look at the Laser Putting Device that I use and consider getting one for yourself

Order yours TODAY! Regular Only $49.95 ..... Newsletter Members ONLY $29.95

Only $29.95 for Members (that's you)

 

Loft, Launch Angle and Driver Length

 

Other than club head speed (which is a consequence of your swing), the distance you hit a Driver depends on:

*the amount of trampoline effect due ot the flexible face
*the loft angle of the face
*the location of the center of gravity

What's important is your combination of launch angle, backspin and ball speed. Lower ball speeds will go farther if launched at higher angles than high ball speed. Even many professionals are switching to higher loft Drivers which now are able to launch the ball with lower backspin than before.

I really encourage you to stay away from the long shaft Drivers. Longer shafts will enable most golfers to have higher clubhead speed, but at the same time there will be a change in launch angle and a greater number of mishits. So, when you hit one off the sweet spot, the ball will go farther, but, you'll hit less balls off the sweetspot and end up in the rough (trees and water) more often.

Fellow Canadian Don Irving publish his study last year called, "Driver Test Study," for his Masters Degree. He tested a full range of handicap golfers and found very few benefited from the longer Driver. If you'd like to read the study, email me, and I'll send you a copy.

If you play with a long Driver, please let me know if you find it beneficial to your game.

Below is a table from research done by Tom Wishon, golf clubmaker guru. Note that there is no significant distance gained by using a longer Driver, regardless of handicap group. This would be due to the fact that even if the golfer were able to increase clubhead speed, the golfer would hit the sweetspot less often, and thus lose any distance gained by increased clubspeed. But, there is a signficant amount of increase in lateral dispersion (hitting the ball right or left of the center of the fairway).

Handicap
Driver Length (in)
Average Distance (yds)
Average Lateral Dispersion (yds)
24 - 36

45

44

43

206

207

207

25

21

17

18 - 23

45

44

43

214

215

216

26

23

17

12 - 17

45

44

43

221

223

223

24

18

15

6 - 11

45

44

43

227

228

228

18

16

12

0 - 5

45

44

43

239

238

238

16

12

10

 

Another good example of this is single length golf clubs. I play a set of single length irons, with every club being the same length as a standard 7-iron. I hit all of these clubs about the same distance as a regulation set of irons, that vary in length. By far the most significant determinant of distance with irons is the loft of the club. And, the single length clubs are also all the same weight, thus they all feel exactly the same to swing.

 

Looking for a new start this season. How about a set of irons that are all exactly the same length and weight? You'll only need one swing and one swing plane.

Go to the 1 Iron website to learn more and order here.

Enter the code 10504 and receive a complimentary e-book

For a short time, One Iron golf clubs will have free worldwide shipping. And, notify me of your purchase by email, and I'll send you a complimentary 2 Swing Like a Genius T-shirts AND 2 pair of "Putting Glasses."

Free shipping ends soon! Save $125. Get your 30-day free trial.

 

Club Dispersion -- What's yours?

If you were to hit 50 balls with the same club (say a 7-iron) and then covered the ending position of all the shots with a large tarp, how big would the tarp be? What would be the shape of the tarp?

If you then did the same with an 8-iron and a 6-iron, would the tarps overlap?

 

Dr. Lephart has a Ph.D. in Biomechanics and has been in university teaching in that field for over 35 years. He spent 28 years at the University of Melbourne in Australia in the Human Performance, Physical Education, Zoology and Psychology Departments. His last two years have been as a Lecturer in P.E. at the University of Wisconsin Oshkosh.

In his study, he analyzed the variability of golf shots for a 45 year old male golfer with a 12 handicap. The golfer hit irons 1 thru 9. Below is a sample of the resulting shot pattern of the 3 iron and 4 iron. The vertical axis represents the amount of lateral (left/right) variability in the shots. The horizontal axis represents the amount of variability and distance hit by the club.

The average distance for the 3 iron was 172 yards while the variability of distance ranged from about 151 yards to 193 yards. The variability in lateral (left/right) error was from about 19 yards left to 10 yards right.

From his research, Dr. Lephart concluded that:

† The distance interval between clubs was about 10 yards, the the amount of variability in length was about 20 yards and nearly the same for each club.
† The angular error for all clubs remained relatively constant at just over
+/- 3 degrees.
† Almost all clubs showed the tendency for balls that were left of the target to travel further and those to the right to fall shorter.
† The dispersion could be shown as an elliptical pattern.

Another interesting finding was the high degree of overlap in the distance that different clubs can be hit. For example, although the golfer may estimate that he could hit a 5 iron a distance of 158 yards, he would do well to remember that only about two thirds of his 5 iron shots will fall within a distance of 148 to 168 yards, while fully one third will fall outside this range. The 6 iron shot would fall in that same 148 to 168 yard range about half the time. The 4 iron shots would also fall into the 148 to yard range. For most shots, more than one club could easily be selected which would get the job done.

This study confirms that understanding one's shot patterns is essential to choosing the best club for each shot. Sometimes, one can get away with hitting the "wrong club" (because it is hit unusually far or short of average). To achieve the lowest average score, however, one must "play the odds." Since most golfers underclub, it's best to select the longer hitting club, especially if the trouble is in front of the green. In some ways, golf is like a crap shoot.

I've written a little spreadsheet program to keep track of your putting statistics. Make a purchase of anything I sell from my site and I'll send it to you as a BONUS. Just send me an email after your purchase to let me know you'd like it. OR, you can purchase it for only $9.99.

$9.99

 

 

The slope of the green is the single biggest factor in how much your putt will break on the way to the hole, but the fact is:   most golfers have a hard time reading break.

The number one tool chosen by more and more Tour Pros and Caddies to measure greens is the BreakMaster Digital Green Reader.

Learn More -- Click Here

Regular:$119.95 + shipping

Post Masters 2 Days Only $79.95 + free shipping

 

Golf Balls & Temperature -- Learn how temperature affects the distance a golf ball carries.

 

 

Amazon.com Widgets

 

 

 

 

To learn more about Intermediate Focus Golf, CLICK HERE

 

Stages of the Golf Swing

Review the different important stages of the golf swing. Are you getting into the proper positions?. Click on the links below.

Lesson #1: Golf Grip -- The Connection

Lesson #2: Golf Stance & Set-up -- The Foundation

Lesson #3: Golf Swing Plane -- The Swing Slot

Lesson #4: Golf Swing Weight Transfer -- The Athletic Move

Lesson #5: Golf Swing BackSwing -- The Takeaway & Coil

Lesson #6: Golf Swing DownSwing -- Maintain Angles & Transition Period

Lesson #7: Tempo Timing Rhythm -- Backswing/Downswing Ratio

 

Email this Newsletter to a Friend :

 

 

Titleist Pro V1 s

Used Golf Ball Deals

 

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:
FAQI'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.

 

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

If you are interested in receiving a newsletter dedicated to the ideas of this site, use the form below to subscribe.

First Name:
Last Name:
Email:
Handicap:
Signup Remove
Privacy Statement: We will not use your mailing address for bulk mailings (spam). We will send information you have requested only. Furthermore, the frequency we will deliver the information will be small (about one email message per month). We will not pass your email address to third parties under any circumstances.

 

 
Copyright © 2010 [Probable Golf Instruction]
Web site designed by: Dan's Web Templates / AllWebTemplate.com