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Conference 7.286::golf

Title:Welcome to the Golf Notes Conference!
Notice:FOR SALE notes in Note 69 please! Intros in note 863 or 61.
Moderator:FUNYET::ANDERSON
Created:Tue Feb 15 1994
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2129
Total number of notes:21499

1855.0. "Maximizing Clubhead Speed" by NOVA::FINNERTY (Sell high, buy low) Thu Mar 17 1994 10:54

    
    After watching John Daly last weekend, and after reading Ben Hogan's
    old standard on the fundimentals, I got to wondering... (always a
    dangerous thing)
    
    Based on the physiology of the human body, is there an optimum posture
    at address that results in maximum clubhead speed?  If so, what is it?
    
    Consider this a tentative, first attempt at an answer.
    
    �   Clubhead speed is obviously a function of how fast you swing the
    	club, but there are several axes of rotation:
    
    		Axis			Radius
    		____________________	__________________________________
    		left shoulder		3-d distance betw. shoulder & ball
    		left wrist		club length
    		backbone		dist betw shoulder & backbone
    		left arm axis		club length * sin(theta), where
    					theta is the angle formed between
    					the left arm and the club shaft at
    					the point of impact.
    
    �	Since the distance between your backbone and your shoulder socket
    	is fixed (I hope!), then for a given club length the only variable
    	is theta.
    
    �	You can increase theta by cocking your left wrist upward toward
    	your head, but there's a limit to how useful this is, since this
    	decreases the radius between the ball and your backbone.
    
    �	As you increase theta, you also have to lower the right shoulder
    	so that the right wrist directly opposes the club shaft.  When
    	viewed from behind (toward the flag), the right forearm should
    	be in the same plane as the club shaft...  this is so because the
    	only effective way to use the right wrist is to 'supinate' it
    	directly away from the right forearm.  This is in fact what 
    	pictures of Faldo show at the point of impact.
    
    Given your body geometry and the angular velocities that you can swing
    the club through each of the radiuses listed above, and given the club
    length, I believe that there should be a unique theta that maximizes
    clubhead speed.  In other words, given your body geometry and physical 
    strength, the only variable is where your left wrist is at the point
    of impact.  
    
T.RTitleUserPersonal
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1855.1theta approx = 70�NOVA::FINNERTYSell high, buy lowThu Mar 17 1994 15:3014
    
    based on the assumptions in .0 and approximate measurements of club
    length, etc., and my arm length, etc., I get an optimal theta of about
    70�, or 110� for the complement of theta, which is the interior angle 
    formed between the shaft and your left forearm... assuming that it is
    even *possible* to hold onto this angle and lower the right elbow low
    enough (see .0).
    
    if you don't hold on to the wrist angle, and let it flex out to
    theta = 35�, then you lose 5% in clubhead speed, or about 12 yards on a
    250 yard drive.
    
    hmmmm...
                    
1855.2JULIET::BODINE_CHThu Mar 17 1994 15:569
>    if you don't hold on to the wrist angle, and let it flex out to
>    theta = 35�, then you lose 5% in clubhead speed, or about 12 yards on a
>    250 yard drive.
>    
>    hmmmm...
                    
See the ball, hit the ball.

:^)
1855.3will Spring ever come?NOVA::FINNERTYSell high, buy lowThu Mar 17 1994 16:5610
    
    re: if it's even *possible*
    
    it isn't.  so the rule of thumb is to keep your left hand as close to
    your body at the point of impact as is practical... about a hand's
    width away seems about right; (of course we all knew that to begin with. 
    Isn't math wonderful?)	:) :)
    
    /jim
    
1855.4wowsaUSDEV::BLAISDELLRick, dtn: 297-5077Thu Mar 17 1994 20:422
    
      Bad case of cabin fever eh Jim?��   ;^)
1855.5NOVA::FINNERTYSell high, buy lowFri Mar 18 1994 08:015
    
    
    yeah, REAL bad  ;)
    
    /jim
1855.6use the force, Luke.....NAVY5::SDANDREAPlonkerFri Mar 18 1994 09:426
    I'm just happy to keep the ball in the fairway......when I generate
    more clubhead speed, I get alot more distance.  Lord only knows where
    the ball's going, tho.....
    
    Steve (ever see a slice where the ball makes a 90 degree right turn and
    then makes "the jump to hyperspace"?....I can *do* that!)
1855.7Huh ??RAYBOK::COOPEROne-ton Tomato !Fri Mar 18 1994 15:0110
 So let me see if I've got this right. The theta of the beta must be 
equal to the hypotenuse created by the flatulence of the wrist at
the point of impact as opposed to erradicating the effluvium during
the takeaway which cause a severe rotational displacement on the surface
of the ball which in turn creates a temporary conundrum through the
fabric of time. Therefore, assuming all forces are equal, The isolateral
distribution of the swingforce on the ball will result in a flight path
similar to a BANANA !!

Mad HAcker
1855.8NOVA::FINNERTYSell high, buy lowFri Mar 18 1994 15:045
    
    re: BANANNA!
    
    	works for me	;)
    
1855.9By jove I think I've got it!CSOA1::RANKINFri Mar 18 1994 16:283
    yup ! you got it.
    
    -jr
1855.10KOALA::DEFELICEMon Mar 21 1994 12:458
    Jim,
    
    You're not getting a bit mechanical lately, are you?
    
    Just "Be the Ball".  Whatever the heck that means...
    
    Bob
    
1855.11while we're doing that greek alpha thing...BROKE::MOOKWhere are you between two thoughts?Mon Mar 21 1994 14:284
If a you gamma has gonna krappa, I'll beta its a somethin you eta.  Or its a
putts, you can't omega!

Bob 
1855.12I'd beta go to the MATH conferenceNOVA::FINNERTYlies, damned lies, and the CAPMTue Mar 22 1994 11:017
    
    I readily admit to a bad case of cabin fever, but all kidding aside, I
    think that I learned a thing or two in the exercise.  Make that
    three things... #3 is, don't post it in the GOLF conference!!  
    
       :)
    
1855.13KOALA::DEFELICETue Mar 22 1994 11:285
    Jim,
    
    You been talking to Ledbetter lately?
    
    Bob
1855.14One moreRAYBOK::COOPEROne-ton Tomato !Tue Mar 22 1994 13:4713
                     <<< Note 1855.13 by KOALA::DEFELICE >>>

<    Jim,
    
 <   You been talking to Ledbetter lately?
    
 <   Bob

  Well, I was talking to him but decided he was too conventional. I
now mind meld with Mac O'grady while on the practice tee !!

Mad Hacker

1855.15KOALA::DEFELICEThu Mar 31 1994 14:367
    It's the long Winter that's getting on all of us.
    
    Good news!!!  I drove by Green Meadow today (usually first in NH to
    open) and I saw a lot of grass.
    
    Bad news...  I also saw a LOT of snow and water...
    
1855.16speed & decisioningATEIS::MILLERThu Mar 31 1994 15:254
    
    	A sure way to maximize distance/clubhead speed is to take
    	out your seven iron to lay up just short of the water.
    
1855.17ODIXIE::RHARRISI am the NRA, for life!Thu Mar 31 1994 17:305
    If the water is frozen, punch a 3 iron and roll over the water.  That's
    what I do.
    
    Bob
    
1855.18KOALA::DEFELICEThu Mar 31 1994 17:574
    Sounds good to me.  Actually, I am so desperate to play that I'd be out
    there in a second if the course was open.  Last year I played Green M.
    when it opened and it was hysterical.  No roll at all.  In fact, a lot
    of shots just got plugged or buried in the ground.
1855.19coming around againATEIS::MILLERThu Mar 31 1994 18:163
    
    	Since bad shots come in groups of three, a fourth bad shot is
    	actually the beginning of the next group of three.
1855.20Opening day in NH ???STAR::TGOODWINFri Apr 01 1994 10:137
Re: .15, .18

	This morning I stopped in at the Daily Grind ( coffee shop across from
Green Meadow ) heard that said that the groundskeeper hopes to have at least
9 holes open this weekend.  The driving range has been open since Wednesday.

Tom