Angles and arcs

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Old 12-06-2009, 12:28 PM
slicer mcgolf slicer mcgolf is offline
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Daryl are these views from the sky down or from face on? If the latter, I think this proves my assumption. I have trouble wrapping my mind around a shallow and short arc. If a club comes in steep, the arc would be short, and still short if it exits steep.
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Old 12-06-2009, 12:56 PM
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Daryl Daryl is offline
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Originally Posted by slicer mcgolf View Post
Daryl are these views from the sky down or from face on? If the latter, I think this proves my assumption. I have trouble wrapping my mind around a shallow and short arc. If a club comes in steep, the arc would be short, and still short if it exits steep.
They're face on. But you make a good point. Angle of Attack. Divot depth is related to ball position vs. Low Point.

Theoretically, if you played a wedge and the ball was located at Low Point, then you wouldn't have a divot. Conversely, play a two iron with the ball 6" back and you'll have a divot.
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Old 12-06-2009, 01:14 PM
slicer mcgolf slicer mcgolf is offline
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I think if any club was chosen and contact was prior to low point did we would see a divot.

That being said, and disregrding ball position and contact, is there an instance where creating a longer arc produce a steeper angle of attack
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Old 12-06-2009, 01:25 PM
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Daryl Daryl is offline
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Originally Posted by slicer mcgolf View Post
I think if any club was chosen and contact was prior to low point did we would see a divot.

That being said, and disregrding ball position and contact, is there an instance where creating a longer arc produce a steeper angle of attack
Well. If you want to get into pulley size and all of that, then I'm sure someone can exaggerate a swing and have a steeper angle of attack with a Driver than when using a wedge especially if using an outside-in swing.

But if we limit the parameters to club length and an On Plane swing, then the longer the club, the shallower the angle of attack. But divot depth is strictly related to shoulder to ground distance and ball location to low point.
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Old 12-06-2009, 01:33 PM
slicer mcgolf slicer mcgolf is offline
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I'm with you the shoulder distance and divot depth.

I don't fully understand what you mean with pulley size
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Old 12-06-2009, 02:00 PM
O.B.Left O.B.Left is offline
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Pulley size refers to the Endless Belt Analogy. A small pulley being a late release of #2 Angle, left hand wrist cock with an associated increase in the Angle Of Attack.

Not sure I understand what you are referring to when you say "create a longer arc", since it could be done in several manners. Using Homers geometry and speak, the Radius of the swing is the distance from the Left Shoulder to the Low Point and is therefor a function of the length of the club used. For any particular club length or swing radius, the more Sweepish the Release the more the clubhead path approaches the maximum Radius, circumference, width associated with a zeroed out #2 angle, no left wrist cocking, constant full lever extension and minimal Angle of Attack.

So assuming a steady center, left shoulder (you cant draw perfect circles without a fixed center point) the Angle of Attack is a function of the length of the club shaft and the pulley size. Take a look at Hogan's backswing vs downswing here. Different angles, clubhead paths due to differences in his (Primary) lever extension going back (lagging takeaway) vs down (snap release).




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Old 12-06-2009, 02:20 PM
slicer mcgolf slicer mcgolf is offline
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Very clear. Thanks.
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