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Originally Posted by 12 piece bucket
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So the motion is always PERPENDICULAR (Geometry. meeting a given line or surface at right angles) the Left Arm but Vertical to the selected Basic Plane of Motion?
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How about this,
Bucket:
The Left Wristcock Motion (the Plane of Motion of the
Clubhead) is Vertical (or perpendicular) to its
directly opposing Plane. Again, this is the same motion used when hammering a nail into a floor (horizontal plane), a wall (vertical plane) or a pitched roof (angled plane).
This Motion is
sometimes Vertical to the Plane of Motion of the
Clubshaft (Angled). It is
always Vertical to the Plane of Motion of the
Clubface (Horizontal, Angled or Vertical).
Threaded Mode
