Quote:
Originally Posted by spino1i
I think this is where me and Your Boss are disagreeing. I am talking about club path and he's talking about swing direction, which apparently is measured as the path the club is going at the exact bottom of the arc. Im pointing out this is a silly thing to measure, when you could just measure the club path at impact.
If the club is travelling down but straight (relative to the target) at impact an the face is square, it is IMPOSSIBLE for the ball to travel any direction but straight (negating the gear effect from an off-center strike) I am talking about the path of the club at impact, NOT the path of the club at the bottom of the swing arc.
i haven't studied this in-depth, so this will just be an attempt to further the discussion. i'm sure people will correct me where i'm wrong.
suppose you draw a target line on the ground, and then hold a hula hoop at a 60 degree angle to represent the arc of a golf swing aligned down that target line, such that the low point of the hula hoop is touching the ground at a point on the target line. at first, it's natural to think of that point as the point of impact. now, imagine the face of a golf club that is attached to the hula hoop and following the arc. as it approaches the low point of the hula hoop, in the moments before the clubface reaches the bottom of the arc, it is moving downward. but, from a viewpoint looking down the target line from behind, it's easy to see that as the clubface is moving downward, it is moving from inside the target line, rightward, towards the target line. the only point on the hula hoop that is actually on the target line is the bottom the arc, at the point where the hoop is touching the ground and the target line.
for any iron shot, we want the clubface to be moving downward at impact. therefore, the actual point of impact will be behind the low point of the arc. visualize the ground being sand, such that you can push the hula hoop into the sand, until the low point is buried. the point of impact will be where the hoop is visible at ground-level...a distance behind the true low point of the arc. after impact, the club will be continuing downward, into the ground, and moving to the right if viewing down the target line from behind.
in order to have the clubface be moving downward AND straight down the target line as you describe, the hula hoop would have to be perpendicular to the ground. or, the arc of the clubface would have to follow some kind of u-shape that cannot be represented by a hula hoop.