Longitudional vs Radial Acceleration

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Brian Manzella

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golfbulldog said:
"Search for the Perfect Swing" provides some great photos of 2 single figure players who keep the club up the left arm for a long time!!

Alec Wilmot ( 8 handicap) and Bobby Reid ( 4 handicap )

They do not use any right hand to apply force across the shaft...

These guys could play...

Need to explain how they do it... left wrist torque??




I do not know the nature of their amputation, how long-standing etc but there must be similar photos of more recent amputees with similar alignments past impact.

Notice how their left arm and shaft does not bend as the pendulum model diagram predicts...

These guys are similar to the Ping-man machine but can apply left wrist torque... maybe that is the difference?
Click to expand...

Not only can they apply "left wrist torque," but they CAN APPLY force across the shaft!!

AND!!!! They are hitting a golf ball (the ball slows don't the swingle).
 
mandrin

mandrin

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mb6606 said:
"I have put my old faithful two segment model to work to quantify a bit this wrist torque aspect of the swing. Have a look here."

Mandrin,
The model looks great for swinging a golf shaft. What are the addtional forces when you apply the clubhead to the model? The clubhead can open and close in a real golf swing.
Thanks
Click to expand...
mb6606,

Adding the clubhead 3D means introducing its offset mass. This creates primarily a centrifugal torque responsible for the forward bending of the shaft through impact. I have tried in a previous post, Cock’n’Roll , to analyze the effect of introducing a clubhead with its offset mass as it relates to accumulator #2 and #3 in the downswing.

As soon as you get away from the relative simplicity of a 2 or 3 segment 2D model of the golf swing things quickly get very complicated. A real nasty problem is that as soon as you get to a more complex model one has to have information of the real forces and torques to be able to use the model.
 
golfbulldog

golfbulldog

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Brian Manzella said:
Not only can they apply "left wrist torque," but they CAN APPLY force across the shaft!!

AND!!!! They are hitting a golf ball (the ball slows don't the swingle).
Click to expand...

How can they apply force across the shaft when they do not have any right hand? I thought that this would make them swingers only? no? Hope you can clear up my muddle!
 
golfbulldog

golfbulldog

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puttmad said:
That's because they don't need to cater for the right hand being on the club, which is accomodated for by a two handed golfer by bending the left elbow.

These guys don't need to bend the left elbow to shorten the radius, hence no pendulum...
Click to expand...

I agree that not having a right hand grip enables them to maintain left arm and shaft relationship from follow through to finish...

but Brian is saying that many people need the right hand to keep the shaft up the left arm from impact to follow through...i always understood that this required a right hand hitting action to get the "lee Trevino" look from Brians logo man...ie. the right hand grip and action helps achieve this alignment rather than hinders it.

I will wait and see what he says - i may have got it wrong....:confused:
 
J

Jim Kobylinski

Super Moderator
IMO the reason it stays up the left arm longer is because there isn't enough momentum from the right arm to overtake the clubhead one the club strikes the ground, it basically makes the left arm come to a "screaching halt." so the left wrist keeps moving foward while the cluhead is staying behind.

Make a one arm wedge shot and you'll see what i mean.
 
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