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

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Quote:

Originally Posted by HungryBear (Post 94911)

Rather than interject my opinion I will ask a rhetorical question.

With a flat left hand we have the same RPM. For all hinges, but the "surface speed" or ratio of hand speed to clubhead speed is greatest for horixontal hinging, angled hinging is in the middle and the smallest retio for "true" vertical hinge. But if the ratio's are not the same how could it look the same from the center of rotation? It can't. So it won't?

Interesting, Hummm?

HB

It is obvious some do not understand the difference between absolute and relative- we are dealing with velocity here and the differences that are distinguished by their relative values. That is an impoprtant distinction for everyone.

HB

Maybe this is one of those "can't see the forest through the trees" kind of thing. The purpose of Hinging, Rhythm, etc. is, first and foremost, to satisfy the following point....

the Bold and color is my doing although one would think that HK would have done this himself given his desire to announce important basics.

Quote:

FORCE VECTORS

2-C-0 LINEAR FORCE The ball will respond to non-linear (angular) force exactly the same as to linear forces only if the application produce forces equally linear to the ball but not necessarily linear to anything external to the ball.

Briefly stated, it is necessary to find a way to compress the ball through a particular point along a particular line, and maintain this compression through the same particular point along this same particular line straight line, through the entire arc of the Impact Interval, and with geometrical precision for consistent control. Study 2-K and 2-N.

To maintain compression at a particular point that point, then, must rotate around the same center that the rotating force does. Not just the physical center of the ball nor the gravitational center – just the point of compression. In other words, the original contact points of the Clubface and ball must remain in contact throughout the entire Impact Interval. This is possible only if the motion – or arc – is uniform. Therefore there must be a perfectly centered action – or a compensating manipulation.

Quote:

Originally Posted by Daryl (Post 94925)

This is sooo important. That the impact point be "carried" on trhe ball. Then the ball will be "carried" on the arc of the clubhead. Then the center of rotation will be the left shoulder ( except fo the uncocking left wrist). ???
BUT
the system rotation rate is only a "few" rev. Per/sec. The ball will have a "high" rev. per/sec rate. There must be a rotation but the introduction of rotation is how the ball is worked.

Baseball analogy- knuckle ball can be bad, fast ball with predictable rotation is good , curve ball(s) require high ADDED rotation.

[I should have said- not the center or rotation at the left shoulder but at the swings center of rotation, ]

HB

Here's an interesting video from Sean Foley. http://www.youtube.com/watch?v=ttxTnqVgkO8

We could draw how changes in plane angle require more or less plane line rotation for straight shots from a back of low point ball position using our model method .... Using the geometry of the circle type drawings.

PS looks like he's teaching a vertical drop to the elbow plane there!

Geometry of the Circle, shows that by making only one Alignment change, such as using a Steeper Plane Angle (Shorten the Grip), the Ball will start "Left" of Target (Steeper Angle of Approach). This needs a Compensation if one wants the Ball to Start on the Target Line. Open the Face by Rotating the Grip at Address.

Moving the Ball Aft of Low-Point on the same Plane Line (Flattening the Swing Plane), Although you have Closed the Clubface to compensate, the ball will curve. One needs to Steepen the Plane Angle if you moved the Ball Aft if you want the Ball to go Straight.

I imagine that a "Foley" student should have white tape on the grip of each club outlining the correct compensations for each club in the bag.