Geometry of the circle and how it applies to shot shaping . - LynnBlakeGolf Forums

Geometry of the circle and how it applies to shot shaping .

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Old 12-15-2012, 12:12 PM
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Daryl Daryl is offline
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Originally Posted by O.B.Left View Post
Here's an old doodle of mine. Guys submit drawings you did on a napkin or toilet paper or whatever if you want. Take a photo of it on your phone and post it !!!

Rule #2 Unused toilet paper only! This is for all those Viking fans out there.
Thats a very nice image

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Old 12-15-2012, 01:54 PM
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BerntR BerntR is offline
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Originally Posted by Daryl View Post
Gentlemen,

It makes me sad to see these illustrations where the left shoulder is modeled as a swing center. What happened to the stationary head? Or do you advocate an arms only swing? - because that is the only way you can keep the head quiet and the left shoulder as the swing center. Or have you already forgotten about the "steady constant center" that OB introduced in his 3rd post in this thread and thus, allow the "center" to move around?

This illustration is so wrong in so many ways.
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Old 12-15-2012, 03:11 PM
O.B.Left O.B.Left is offline
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Originally Posted by BerntR View Post
Gentlemen,

It makes me sad to see these illustrations where the left shoulder is modeled as a swing center. What happened to the stationary head? Or do you advocate an arms only swing? - because that is the only way you can keep the head quiet and the left shoulder as the swing center. Or have you already forgotten about the "steady constant center" that OB introduced in his 3rd post in this thread and thus, allow the "center" to move around?

This illustration is so wrong in so many ways.
Ok , lets remove all but the head ..... we need to see the eyes as being above the inclined plane (from DTL) to understand the inherent illusions , what the correct path of the club should look like to the golfer. Thats all we need at present, to nail club path. What it looks like. So you can use the visual as a guide. Nail the actual path , then face and you can talk about ball reaction , shop shaping, divergence.

We can draw / model (moving) centres , levers etc if you want. Or try to anyways . Ive got some doodles I could share. Maybe others do to. The effects of delayed release of #2 on the Angle of Attack etc etc. What centres are being moved about at what point in the swing etc etc etc.

BTW I never intended the drawing to suggest that the left shoulder is the "swing centre". In real life. Most often it isnt ! It can be as you allude to, but isnt for full swings. For full shots the left shoulder is the center of the Arm Swing the head or more correctly a spot between the shoulders is the centre of the Pivot . They are both in play , their sequencing or non is a topic for discussion IMO. The Primary Lever is the Radius of the swing ... assuming your not Right Arm swinging.

I personally use a two bent arms, stiff wristed chipping method (Runyan , Seve style) that IMO is centred around the spot between the shoulders. Its a pure pivot stroke . One Accumulator. There's video of Seve online talking about the progression from chipping to pitching ...... "now we go to the straight left arm". To my mind that means he's introduced the left shoulder as centre of his straight left arm's motion. Nice way to work things. That guy dug it out of the sand. Also there are more centers than just the pivot and arm .... mulitple levers , multiple centres.

The 2D model is not intended to address the issues presented by the multiple levers of the human body. It merely shows the geometry of a circle . All models are somewhat flawed agreed . The machine of 1-L is subject to same. Centres can and do move in real life. With implications to low point , divot etc. etc etc.

Last edited by O.B.Left : 12-15-2012 at 05:02 PM.
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