Learn how to lower your score, not by hitting balls, but by learning how to make better choices on the course. Based on the latest scientific golf research.

Wednesday, August 04, 2004

How to hit a high lob shot & August Giveaway

Hi Probable Golfer,

My latest newsletter is now online. It's Part 6 on my series on short game improvement. The topic is hitting high lob shots around the green. Is it all feel? Or, is there a more scientific system that one can apply? Check it out at the link below.
http://www.probablegolfinstruction.com/PGI%20Newsletter/news08-02-04.htm

Congratulations to Arthur Williams III of Winston-Salem, NC, who won the July contest and a copy of Using The Mental Keys, an audio CD valued at $70. http://www.myaffiliateprogram.com/u/golfkeys/b.asp?id=1229

If you'd still like to order a copy of the CD, you can purchase them from my site at a 10% discount (send me an email & I'll send you a special link), and you'll be entered into August's contest for Mental Toughness, a CD Rom by Dr. Fran Pirozzolo and endorsed by Justin Leonard, 1997 British Open Champion.http://www.directyourmind.com/scripts/d.php?bannerid=12&addcode=CD19

In my last newsletter, I explained a method of hitting controlled partial wedge shots various distances without relying totally on feel. Review the newsletter here.http://probablegolfinstruction.com/PGI%20Newsletter/news07-19-04.htm

Download any of my PGI Golf Tips or Reports. Buy a copy of the CD, Hit Down Dammit!, a supply of Stinger Tees, or some CaddyPatch Impressions. http://probablegolfinstruction.com/Stinger%20Tees/stingertees.htm
You'll be entered into my August contest.

Until my next newsletter, hope you play lots and play well.
Best regards,
Ken Tannar

Thursday, July 15, 2004

Read other Parts from the Technology & Distance series and Short Game series here, Archives.
http://probablegolfinstruction.com/golf_newsletter_archive.htm

The Short Game Part 4: Putting Contours

IV. What if the slope of the green changes between your ball and the hole?


In my last newsletter, I explained how to read putts using the plumb bobbing technique and a matrix
http://probablegolfinstruction.com/reading_putts.htm#matrix
I have developed to translate the plumb read to how much the putt actually breaks. This method, which I advocate is quite accurate as long as your plumbing is accurate, does assume the slope of the green is the same everywhere. As your probably aware, however, green contours change.

Take for instance a putt where the balls in on a mound and the slope at the hole is much less. Plumbing such a putt would not give anywhere near an accurate read. This is a putt where the slope is high early in the putt and low late. Early in a putt, the ball will be moving quite quickly and therefore will not be as greatly affected compared to when the ball is moving slowly. Late in the putt, as the ball slows, even a little slope will cause a lot of break. The slope of the mound, in this case, won't cause the ball to break very much.

The opposite case is the ball being on a part of the green which has little slope and the hole on a part which has a lot of slope. In this case, the largest slope occurs late in the putt (when the ball is moving slowly) and the ball will be greatly affected (it will break a lot).

What about uphill and downhill putts? An uphill putt with break will break less than a downhill putt with similar slope. On a downhill putt, the ball is struck by the putter with less force and is thus going more slowly. The ball, therefore, takes more time to get to the hole and is more greatly affected by the slope (ball breaks more). Experience will tell you how much more or less putts break depending on whether they are downhill or uphill.

On downhill putts that are quite fast, I have had a lot of success by putting the ball off the toe of the putter (about halfway between the sweet spot and the end of the blade). I find I can still make a normal stroke (long and smooth) without fearing hitting the ball way past the hole. I have found that when taking a normal stroke, it's easy to not follow through and pull the putt out of fear of hitting it too far. In addition, I find I don't need to shorten my stroke up to compensate for the downhill. I just make a normal putt for the length and in effect mis-hit the ball off the toe of the blade.

Another thing I have found helpful on severe uphill and downhill putts (tiered greens) is to imagine a position short or long of the hole at which to aim. On a downhill putt, trying to hit to a position short of the hole compensates for the amount of downhill. Likewise, trying to hit to a position long of the hole compensates for the amount of uphill. The amount short or long one aim's depends on the change in elevation.
http://probablegolfinstruction.com/downhill_uphill_putts.htm


Next time, I'll provide you with more great tips dealing wedge play, specifically distance control. How do you swing to hit 60 yards compared with 40 Yards? Is it just fee? It doesn't have to be!!

Purchase my Longest Golf Ball Report (over 300 sold so far) in which I statistically analyze distances of over 90 different golf balls with differing constructions. The balls were hit using a mechanical hitting machine.
http://www.probablegolfinstruction.com/longest_golf_ball.htm


Best regards,

Ken Tannar

Thursday, April 22, 2004



Distance & Technology Part 5: Optimize in All Weather























































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Welcome



Thanks for supporting Probable
Golf Instruction
.
I know it's a little
late, but congratulations
to Phil Mickelson for
winning his first major
and Masters. I hope everyone
is now on the links.
My course just opened
last week.



Order Golf Tips



Want more great golf
tips? Please come
to PGI
Golf Tips
to see the details.
You can download them
immediately.Prepare for
your own game by getting a season's
supply of tees. Golf
tees do make a difference
in how far you hit the
ball. Order your Stinger
Tees
here for only about 5 cents each.

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


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


My latest study is finished. See
some of the details of
the reports HERE.

A Brief Message
       Apr
21/04





  • Ken here from Probable
    Golf Instruction.
    In my last newsletter,
    I explained how
    weather affects
    how far a golf
    ball travels.
    Review the newsletter here.




  • In this issue,
    I'll explain
    the difference
    advances in
    golf ball technology.


  • About 3 weeks ago, I received a copy of Swing
    Machine Golf
    .
    The author,
    Paul Wilson,
    uses a unique
    teaching
    method with
    his students.
    He has been
    featured
    a number
    of times
    on The Golf
    Channel.
    He models
    his teaching
    swing after
    the machine,
    Iron Byron.
    His emphasis
    is on simplicity.
    I think it
    is an excellent
    book (one
    of the best
    I've read).
    I think you'd
    be impressed,
    too. Take a look at it here, Swing
    Machine Golf



  • Have you played any matches yet? Do you
    find you are at
    a real disadvantage
    on some holes because
    you don't get a
    shot or have to
    give away a shot?
    It could be your
    holes' difficulty
    rankings do no
    reflect reality
    of how golfers
    play them. Find
    out your course's
    true hole
    rankings here
    .










Distance & Technology Part 6: The Golf
Ball



Read
Part 1 of this series
here, Clubhead
Mass
.

Read Part 2 of this
series here, Clubhead
Loft
.


Read
Part 3 of this series
here, Clubhead
Shaft
.


Read
Part 4 of this series
here, Clubface
Area
.


Read
Part 5 of this series
here, Weather.

If you'd
like one on
one explanations
about the topic,
sign up for the PGI
Member Select Club
and
I'll answer all your
questions. Now on
to this week's topic.


VI. Distance
& the Golf Ball



     Two
things have led
to PGA Tour players
hitting the ball
significantly farther
in the last 15
years: new driver
technology and
new golf ball technology.
Most of the newsletters
in this series
have focused on
drivers. This issue
will focus on the
new golf ball and
its benefits to
all golfers.


     In
Hogan and Snead's
era, the golf balls
used were 3 piece
construction. A
small rubber core
filled with fluid,
wrapped by hundreds
of feet of elastic,
with a soft cover
made of balata.
Then came a harder
cover made of surlyn
for durability.
then the two piece
ball was developed
which consisted
on a solid core
surrounded by a
surlyn cover. The
benefit of the
surlyn cover was
a longer lasting
ball (especially
on mishit irons)
but it lacked a
feeling of softness
and definitely
lacked backspin
for stopping on
greens. The two
piece construction
led to greater
distance but again
itlacked
backspin.


     Today,
the 3 piece ball
with elastic windings
has all but vanished.
The solid core
balls are much
less expensive
to produce and
the material used
compresses and
expands (that's
what happens to
the golf ball when
hit) without losing
as much energy.
The result is more
energy is transferred
from the club to
the ball resulting
in greater distance.


     PGA
Tour players now
hit it farther
because of the
much better driver
technology (most
significant reason)
and because they
can now play a
high spin ball
without the ball
being a wound
ball with a balata
cover. Amateurs,
on the other hand,
have been playing
with harder 2-piece
balls for years,
therefore their
new found distance
is mainly the result
of club technology.
Better amateurs
that previously
played with soft,
wound balls have
realized additional
gains, like the
pros, since they
can now play a
soft, high spin
ball that is still
durable and goes
a long ways.


     What
is the longest
golf ball out there?
That's a very popular
search by surfers
with the search
engines. Pretty
well every ball
manufacturer claims
to have the longest
ball. They can't
all be the longest.
I'd like to suggest
to you two avenues
to pursue if this
question is important
to you.


1.
Purchase my Longest
Golf Ball Report
in
which I statistically
analyze distances
of over 70 different
golf balls with
differing constructions.
The balls were
hit
using a mechanical
hitting machine.


2.
Take a look at
the results of
Equip2Golf.com,
an independent
golf testing company.
They have tested
many of the new
golf balls using
golfers and launch
monitor equipment.
Below is a sample
of their results.













































 
Driver
Carry
Driver
Spin
6-iron
Carry
6-iron
Spin
Maxfli Noodle
Spin
229
3406
159
4901
Titleist Pro
V1
233
3114
166
5232
Pinnacle Exception
235
2660
170
4682
Strata Tour
Ace
237
3142
163
5444
Nike One
232
3342
163
5164

The
Pro V1 and the
Nike One are both
expensive balls.
The others listed
are much cheaper.
Note that the carry
distances are not
that different.
The distances all
depend on ball
speed and ball
spin. Just a slight
caution that the
results are from
human testing (not
machine testing)
therefore there
is more variance
in the tests and
more uncertainty.
My Longest
Golf Ball Report
explains
what this uncertainty
does to concluding
whether one golf
ball is in fact
longer than another
for all golfers.


Another
characteristic
of a golf ball
that
has a slight effect
on distance is the
size and depth of
the dimple. Without
any dimples at all,
a drive would only
carry about 100 yards
.
It has been determined
that the deeper the
dimple, the greater
the distance, although
it is only a few
yards. On today's
new balls, the size
and number of dimples
does not affect distance
significantly. The
different patterns
are mainly for aesthetics.


Play
with my Driver
Distance Calculator
.
You can input such
variables as loft
and clubhead speed
to determine the
optimum loft. I'll
be adding to it
soon so that you
can input different
golf ball parameters
such as speed and
spin.



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


The next newsletter's topic will continue to discuss how to
optimize distance off
the tee using the right
golf ball. What spin
maximizes distance
for your ball speed?
Do you want a low spin
ball or a high spin
ball?


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 Program™


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

 


If you'd like to opt out of this newsletter, send
me an email
with the subject "opt
out, please"


 



Copyright
© 2004 [Probable Golf Instruction]


Website designed by:

Dan's Web Templates / AllWebTemplate.com








Saturday, March 27, 2004

Distance & Technology -- Part 4: Driver Face Area

Ken here from Probable Golf Instruction. Thanks for being part
of Probable Golf Instruction. If you have any questions, please send
an email to me. probablegolf@yahoo.ca

Spring has sprung for most of us. This past weekend marked the
spring equinox for the Earth where we notice the greatest change in
the length of the day. The days will continue to get longer (in the
northern hemisphere) until June 21, our longest day. This all means
warmer golf weather and more time to golf.
If you'd like to view the html version of this newsletter, click on
the link here.
http://probablegolfinstruction.com/PGI%20Newsletter/news03-24-04.htm

************************************

In my last newsletter, I explained how clubhead loft and
center of mass affects distance. Review the newsletter here.
http://probablegolfinstruction.com/PGI%20Newsletter/news03-10-04.htm


In this issue, I'll explain how the size of the club face affects
the distance a golf ball travels on mishits. How often do you hit
your drives from the center of the clubface? How much distance do
you lose on off center hits?

As I've mentioned in earlier emails, I've teamed up with an
excellent teaching pro that has produced an excellent instructional
CD called "Hit Down Dammit!". It compliments the math/science focus
of my site with great instruction on how to physically swing the
golf club. As a subscriber to this newsletter, you can download a
sample here.
http://www.probablegolfinstruction.com/HitDown/download_sample.htm
There is even an audio only version that can be played in your
car's CD.

If you haven't done so already, try out my free, new Driver
Distance Calculator. You can input different quantities such as
clubhead speed, mass, air temperature, etc., to see how the
distance changes.
http://probablegolfinstruction.com/fpp-v4.0-single/golf-club-form/cl
ub-calculator.htm


**********************************

If there is any topic you would liked explained and presented in my
upcoming newsletters, just email me. I'll attempt to cover your
topic in a future newsletter.

If you'd like one on one explanations about the topic, sign up for
the PGI Member Select Club
http://probablegolfinstruction.com/pgi_select_club_ad.htm
and I'll answer all your questions.

Read Part 1 of this series here.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-12-04.htm
Read Part 2 of this series here.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-20-04.htm
Read Part 3 of this series here.
http://probablegolfinstruction.com/PGI%20Newsletter/news03-10-04.htm


Now on to this week's topic.

IV. Clubhead Face Area

How often do you hit the ball from the center of the clubface of
your driver? You know you've gotten all of the ball; you've smoked
it. Next time you play, keep track. If you're a high handicapper,
you probably don't make solid contact all that often. In fact, it
has been well documented from tests that the higher the handicap of
the golfer, the greater the percentage of mishits and the greater
the degree of error of the mishits.

One of the great advances in clubhead technology has been the
larger clubface. Often, the clubs are advertised by their volume.
It is the area of the clubface which is the most important factor.
Larger clubfaces mean larger sweetspots which means the loss of
distance on mishits is less.

It's much like to switch from small to large tennis rackets back in
the 80s. The tennis ball is easier to hit with a larger racket.
Likewise, the golf ball is easier to hit with a large face driver.
One might think that the increased head size would increase air
resistance and thus decrease clubhead speed significantly. Tests
have shown, however, that the drop in speed is not significant,
only resulting in the loss of less than one yard.

The speed of the ball depends on the clubhead speed and where the
point of contact is on the clubface. The farther from the center of
the clubface, the less the ball speed. For each 1 centimetre (about
1/2 inch) the point of contact is from the center of the face,
there is about a 1 m/s loss in ball speed. In addition, the ball's
backspin is different as well as it gaining sidespin. The net
effect is a significant loss in distance, as you are well aware.

The old style drivers used to be much worse. Hit a drive off the
toe or heel of the club and one would lose 10 - 30 yards of
distance. The new large face drivers, the degree of loss is much
less 5 - 15 yards. Since most golfers mishit their shots most of
the time, a large face driver is essential.


The larger face and clubhead also means the clubhead doesn't twist
as much on off center hits, meaning that there is less sidespin
imparted to the ball so that it doesn't curve offline as much. The
new, large clubheads have larger moments of inertia. The mass of
the club is distributed over a larger area making the sweet spot
larger.

In summary, this series of newsletters have introduced and
discussed reasons why new driver technology has increased distance.
The right clubhead weight, loft, center of gravity and shaft for
the individual golfer can optimize distance. Having a large area
face driver will reduce loss of distance on mishits. Bigger is
better!


Play with my Driver Distance Calculator. You can input such
variables
as loft and clubhead speed to determine the optimum loft.
http://probablegolfinstruction.com/fpp-v4.0-single/golf-club-form/cl
ub-calculator.htm

A list of resources that have been used to produce this newsletter
can be found on my website here.
http://probablegolfinstruction.com/golf_science_resources.htm

The next newsletter's topic will how to optimize distance off the
tee under different weather conditions (cold, hot, windy, etc). As
well, I'll provide an itemized checklist for buying a new driver
suited to your game.
***************************************

The focus of my site is 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. Hit Down Dammit!
http://www.probablegolfinstruction.com/HitDown/hitdowndammit.html

2. Improve our physical fitness and strength.
The Golf Trainer Power Performance Program™
http://www.golf-trainer.com/index.cfm?affID=probablegf

3. Improve our mental games. Golf Mind Software
http://directyourmind.directtrack.com/ad/34/cd19

4. 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.
http://probablegolfinstruction.com

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

******************************************

My latest study on amateur golf scores and
handicaps.

See some of the details of the reports HERE.
http://probablegolfinstruction.com/Statistics/team.htm

There are 3 reports:

Report #1: Team Events

Report #2: Match Play & Stroke Allocation

Report #3: Birdie Ratios & Other Scores

*************************************

Each report can be downloaded immediately for $7.99 or all three
can be purchased for $19.99.

For Newsletter Members Only (that's you), all three reports can be
purchased for a special discounted price of $14.99, but only by
using the link below.

Take a closer look at some of the details of the reports HERE, and
then come back here to order.
http://probablegolfinstruction.com/Statistics/team.htm


Pay $14.99 thru 2CheckOut Goods and services provided by Probable
Golf Instruction (BC, Canada).
Sold by 2CheckOut.com Inc. (Ohio, USA).
https://www.2checkout.com/cgi-bin/ccbuyers/purchase.2c?sid=75276&pro
duct_id=13&quantity=1

Once processed by 2CheckOut, you will be prompted with a link to
download. Since the time is very limited, you should download
immediately.



OR

Pay using PayPal. Go to the HTML version of this newsletter and
scroll down to the PayPal Icon.
http://probablegolfinstruction.com/PGI%20Newsletter/news01-23-04.htm

***************************************


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

Ken Tannar

Tuesday, February 24, 2004

Hi Probable Golfer,

Ken here from Probable Golf Instruction. Thanks for being part
of Probable Golf Instruction. If you have any questions, please send
an email to me. probablegolf@yahoo.ca

Congratulations to Mike Weir (a fellow Canuck) who won at Riviera.
The camera people better start getting used to filming a leftie.If
you'd like to view the html version of this newsletter, click on
the link here.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-20-04.htm

************************************

In my last newsletter, I explained how clubhead mass affects
clubhead speed, and thus ball speed. Review the newsletter
here.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-04-04.htm


In this issue, I'll explain how the clubhead loft and center of
mass affects the distance a golf ball travels. Is your loft right
for you? Is it right for your club?

I've also developed a calculator which will determine statistically
the hole rankings for different handicaps. Find out more here.
Download a sample of the calculator. You won't be able to input any
values, but you'll see the layout and find out how to use it.
"http://probablegolfinstruction.com/Statistics/ranking_calculator.ht
m

Download a sample of the calculator. You won't be able to input any
values, but you'll see the layout and find out how to use it.
http://probablegolfinstruction.com/Statistics/HoleDifficultyRankingS
ample.xls


Would you like to determine the real hole difficulty ranking of the
holes on your course? Where should you really be getting your
strokes? My latest study reveals who benefits from the "official
hole rankings."
http://probablegolfinstruction.com/Statistics/team.htm


**********************************

Over the next few months, as we lead up to a new golf season for
everyone, the topic of my newsletter will be how new Driver
Technology provides greater distance to us all.

If there is any topic you would liked explained and presented in my
upcoming newsletters, just email me. I'll attempt to cover your
topic in a future newsletter.

If you'd like one on one explanations about the topic, sign up for
the PGI Member Select Club
http://probablegolfinstruction.com/pgi_select_club_ad.htm
and I'll answer all your questions.

Read Part 1 of this series here.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-20-04.htm

Now on to this week's topic.

I. Clubhead Loft and Optimum Distance

Other than environmental conditions, the three major determinants
of distance for a golf ball are: clubhead speed, initial trajectory
angle and initial backspin. For the most part, the club can't do
much for your clubhead speed (as long as it has optimum mass, see
Part 1), but it can play a major roll in trajectory angle and
backspin. If there were no air, the ball's backspin would not have
any effect and the optimum launch angle would be 45 degrees. The
ball would not go anywhere near as far as it goes in air (see here
for more). Backspin creates a lot of lift for the ball which keeps
it in the air longer, so it can fly farther.

The initial trajectory angle and backspin are greatly affected by
the loft of the club and its center of mass (the path of the club,
ascending or descending, also plays a role). The loft which
optimizes distance depends on clubhead speed. The greater the
clubhead speed, the lower the desired loft angle. For a short
hitter, the optimum loft might be 16 degrees (which means a 3 wood
loft), while for a longer hitter, the optimum angle might be 12
degrees.

Club manufacturers will clearly label the loft of the driver but
make no mention of the center of mass, another important factor. A
low center of mass will increase the launch angle thus increasing
the effective loft of the club. Since there is no easy way to
measure where the center of mass of a club is, it's important that
the golfer experiment with different lofts of the same type of
driver. A 12 degree loft in one driver won't be the same as the 12
degree loft in another driver.

Most golfers should play a driver which has a center of mass that
is low and back from the face of the club. This will promote higher
trajectory without having to have too much loft. The greater the
loft of the clubface, the smaller will be the ball speed. One wants
optimum trajectory with maximum ball speed. Having the center of
mass back from the face will also mean the club will twist less on
off center hits (which occur more often than not).
If you are serious about trying to optimize your distance through
clubhead mass, go to a facility that has a club/ball monitor (one
that measures clubhead speed, ball speed, trajectory, spin, etc).
You can experiment with different clubhead masses and shafts to
find the one that produces optimum ball speed, trajectory and spin
(the effects of which will be discussed in a future newsletter).

Play with my Driver Distance Calculator. You can input such variables
as loft and clubhead speed to determine the optimum loft.
http://probablegolfinstruction.com/fpp-v4.0-single/golf-club-form/club-calculator.htm

A list of resources that have been used to produce this newsletter
can be found on my website here.
http://probablegolfinstruction.com/golf_science_resources.htm

The next newsletter's topic will be the driver shaft. What is its
optimum mass and stiffness for greatest distance?
***************************************

The focus of my site is 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. Hit Down Dammit!
http://www.probablegolfinstruction.com/HitDown/hitdowndammit.html

2. Improve our physical fitness and strength.
The Golf Trainer Power Performance Program™
http://www.golf-trainer.com/index.cfm?affID=probablegf

3. Improve our mental games. Golf Mind Software
http://directyourmind.directtrack.com/ad/34/cd19

4. 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.
http://probablegolfinstruction.com

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

******************************************

One last mention of my latest study on amateur golf scores and
handicaps.

See some of the details of the reports HERE.
http://probablegolfinstruction.com/Statistics/team.htm

There are 3 reports:

Report #1: Team Events

Report #2: Match Play & Stroke Allocation

Report #3: Birdie Ratios & Other Scores

*************************************

Each report can be downloaded immediately for $7.99 or all three
can be purchased for $19.99.

For Newsletter Members Only (that's you), all three reports can be
purchased for a special discounted price of $14.99, but only by
using the link below.

Take a closer look at some of the details of the reports HERE, and
then come back here to order.
http://probablegolfinstruction.com/Statistics/team.htm


Pay $14.99 thru 2CheckOut Goods and services provided by Probable
Golf Instruction (BC, Canada).
Sold by 2CheckOut.com Inc. (Ohio, USA).
https://www.2checkout.com/cgi-bin/ccbuyers/purchase.2c?sid=75276&pro
duct_id=13&quantity=1

Once processed by 2CheckOut, you will be prompted with a link to
download. Since the time is very limited, you should download
immediately.



OR

Pay using PayPal. Go to the HTML version of this newsletter and
scroll down to the PayPal Icon.
http://probablegolfinstruction.com/PGI%20Newsletter/news01-23-04.htm

***************************************


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

Ken Tannar

Friday, February 20, 2004

Hi Probable Golfer,

Ken here from Probable Golf Instruction. Thanks for being part
of Probable Golf Instruction. If you have any questions, please send
an email to me. probablegolf@yahoo.ca

The PGA Tour is in full swing. Are you?
If you'd like to view the html version of this newsletter, click on
the link here.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-12-04.htm

************************************

In my last email to you, I told you a little about a great
instructional CD I discovered on the golf swing called Hit Down
Dammit! as well as setting the stage for upcoming newsletters that
deal with distance and technology. Review the newsletter here.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-04-0
4.htm
http://probablegolfinstruction.com/HitDown/hitdowndammit.html

In this issue, I'll explain how the clubhead weight affects the
distance a golf ball travels. Is your club too heavy, too light or
just right?


I've also developed a calculator which will determine statistically
the hole rankings for different handicaps. Find out more here.
http://probablegolfinstruction.com/Statistics/ranking_calculator.htm

Download a sample of the calculator. You won't be able to input any
values, but you'll see the layout and find out how to use it.
http://probablegolfinstruction.com/Statistics/HoleDifficultyRankingS
ampl
e.xls

Would you like to determine the real hole difficulty ranking of the
holes on your course? Where should you really be getting your
strokes? My latest study reveals who benefits from the "official
hole rankings."
http://probablegolfinstruction.com/Statistics/team.htm


**********************************

Over the next few months, as we lead up to a new golf season for
everyone, the topic of my newsletter will be how new Driver
Technology provides greater distance to us all.

If there is any topic you would liked explained and presented in my
upcoming newsletters, just email me. I'll attempt to cover your
topic in a future newsletter.

If you'd like one on one explanations about the topic, sign up for
the PGI Member Select Club
http://probablegolfinstruction.com/pgi_select_club_ad.htm
and I'll answer all your questions.

Nowon to this week's topic.

I. Clubhead Weight

Clubhead weight (or more correctly, clubhead mass) is one of the
key contributors to distance off the tee. The greater the mass of
the clubhead and the great its speed, the farther the ball will go.
Unfortunately, the greater the clubhead's mass, the slower will be
its speed at impact. One can't swing a more massive (heavier)
clubhead as fast.

The physics of the interaction between club and ball is quite well
understood. At play are the laws of momentum and energy. A given
player (let's say you) is capable of swinging a club with a some
maximum speed. The more massive the club, tthe slower will be this
maximum speed. The speed of the ball is a result of the mass of the
clubhead and its speed. So, as the mass increases, so will the
resulting ball speed. But, since the clubhead is more massive, its
maximum speed is less. There is actually an optimum mass for each
golfer that produces the greatest ball speed. For most golfers,
that mass is about 200 grams. A physics equation that determines
the resulting ball speed is:


V = U*(1+e)/(1+m/M)

where U = clubhead speed, m = mass of ball, M = mass of clubhead

e is called the coefficient of restitution which is a measure of
the efficiency of the kinetic energy transfer between club and
ball. e has a value between 0 and 1. A collision with e=0 would be
like a club hitting a putty ball, with the ball sticking to the
club (maximum loss in kinetic energy). A collision with e=1 is
called a perfectly elastic collision (no loss in kinetic energy).
There would be no heat or sound produced at all, so of course is
completely hypothetical.

In the past 10 to 15 years, club and ball manufacturers have made
great leaps in increasing the e of the collision due mainly to the
hollow, metal faced drivers whose faces can "spring back" upon
collision. So much so that the USGA has put in place a legal
maximum which is about 0.83. Club testers have found that e
decreases with increased clubhead speed. Tiger Woods' drives,
therefore, are not as efficient as yours or mine. He makes up for
this by having significantly more clubhead speed.

Let's take the example that your clubhead speed is 110 mph (48.9
m/s), which means you are a relatively long hitter. A typical value
of e (exact value depends on the club) would be about 0.83.
According to the equation above, the resulting ball speed (assuming
a solid hit) would be:

V = 110*(1+0.83)/(1+46/190) = 110*1.47 = 162 mph

assuming a 190 g clubhead hitting a 46 gram ball. The ball speed
ends up being
1.47 times the original clubhead speed. Let's assume the amount of
energy you can deliver to the club is same no matter what the mass
of the club. Light clubs would have high speed, heavy clubs would
have low speed, but the kinetic energy of the club would be the
same in each case. The equation for kinetic energy is:

KE = 0.5*m*v*v = 0.5*0.19*48.9*48.9 = 227 Joules

where mass must be in kg and speed in m/s. In the table below are
the resulting values for clubhead speed, e, and ball speed using
different mass clubs, assuming constant kinetic energy of 227
Joules.

See the html version for the table of values.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-12-04.htm

Note that it appears that the less the mass of the club, the
greater the ball speed. The assumption made, however, is that the
kinetic energy of the club is the same in all cases. Realistically,
a golfer cannot obtain such speeds with light clubs. As determined
by tests published in "Search for the Perfect Swing," the speeds of
the clubs and the resulting ball speeds would be:

See the html version for the table of values.
http://probablegolfinstruction.com/PGI%20Newsletter/news02-12-04.htm


Ball speed actually peaks when using a clubhead with mass 0.210 kg
or 210 g. This result is for a kinetic energy of 227 Joules.
Different players with different swings and strengths would all
have a slightly different optimum clubhead mass. For most, it is
around 200 g, thus most drivers have clubhead masses that
correspond to this.

For most, experimenting to find the optimum mass would not yield
very many extra yards. And, it's not as simple as adding a little
lead tape to the clubhead because that would also change the center
of mass of the club and the relative stiffness of the shaft, both
also determiners of distance (future topics). If you happen to be
quite strong and fit, you might be able to swing more massive
clubheads with greater energy, thus resulting in more distance. One
can only experiment.

If you are serious about trying to optimize your distance through
clubhead mass, go to a facility that has a club/ball monitor (one
that measures clubhead speed, ball speed, trajectory, spin, etc).
You can experiment with different clubhead masses and shafts to
find the one that produces optimum ball speed, trajectory and spin
(the effects of which will be discussed in a future newsletter).

A list of resources that have been used to produce this newsletter
can be found on my website here.
http://probablegolfinstruction.com/golf_science_resources.htm

The next newsletter's topic will be the driver shaft. What is its
optimum mass and stiffness for greatest distance?
***************************************

The focus of my site is 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. Hit Down Dammit!
http://www.probablegolfinstruction.com/HitDown/hitdowndammit.html

2. Improve our physical fitness and strength.
The Golf Trainer Power Performance Program™
http://www.golf-trainer.com/index.cfm?affID=probablegf

3. Improve our mental games. Golf Mind Software
http://directyourmind.directtrack.com/ad/34/cd19

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

******************************************

One last mention of my latest study on amateur golf scores and
handicaps.

See some of the details of the reports HERE.
http://probablegolfinstruction.com/Statistics/team.htm

There are 3 reports:

Report #1: Team Events

Report #2: Match Play & Stroke Allocation

Report #3: Birdie Ratios & Other Scores

*************************************

Each report can be downloaded immediately for $7.99 or all three
can be purchased for $19.99.

For Newsletter Members Only (that's you), all three reports can be
purchased for a special discounted price of $14.99, but only by
using the link below.

Take a closer look at some of the details of the reports HERE, and
then come back here to order.
http://probablegolfinstruction.com/Statistics/team.htm


Pay $14.99 thru 2CheckOut Goods and services provided by Probable
Golf Instruction (BC, Canada).
Sold by 2CheckOut.com Inc. (Ohio, USA).
https://www.2checkout.com/cgi-bin/ccbuyers/purchase.2c?sid=75276&pro
duct_id=13&quantity=1

Once processed by 2CheckOut, you will be prompted with a link to
download. Since the time is very limited, you should download
immediately.



OR

Pay using PayPal. Go to the HTML version of this newsletter and
scroll down to the PayPal Icon.
http://probablegolfinstruction.com/PGI%20Newsletter/news01-23-04.htm

***************************************


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

Ken Tannar

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