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Wildthing

Optimising Clubhead Speed - Is this the real way?

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Posted (edited)

This is again for those mainly interested in the biomechanics of the golf swing (ie. what is going on rather than how). Just thought it might interest others who are trying to figure out what many of the pros are doing to drive that ball 300+ yards.

Lets use  DJ as an example about optimising clubhead speed.

JohnsonHandArcPath.jpg

The secret to his high clubhead speed seems to fit in with physics.

1. From Image 1  to just before image 3  , he has somehow made biomechanical movements that have created a hand path on a 'straightish'  path (or an arc with a long radius).

2. Along this 'straightish' path , he has increased his hand speed as much as he can.

3. He has retained left 'wrist cock' angle (angle between shaft and forearm) from top of backswing to just before image 3  (where one can see the 'release' of that angle happening- increasing). Physics proves that more wrist cock before a 'natural' release , the faster the clubhead speed.

4. The 'natural release' of that angle happens due to 'pseudo CF forces', because he has performed biomechanical moves that change his hand path from straightish to a more curved path. His wrists just before image 3  act as oily hinges and he is basically letting the 'momentum' of the clubhead (ie. evoked by pseudo Centrifugal Forces) uncock his wrists (ie. a natural release).

A simple 'imperfect'  analogy of point 4 is like driving in a car (ie. your hands) on a straight road increasing your speed and then taking a very tight corner turn. Any objects (ie. the clubhead ) in the back seat will go sliding across the seat very fast. 

The counterintuitive part  is that his 'wrists/hands' end up actually restricting the 'angular velocity' of the clubhead because it is rotating faster than the hands can keep up.  This is proven by physics which says that forward shaft bend into impact means 'negative torque' at the hands (see image below).

image.png.b3704164c965de02cfb5ce06ec9f3d29.png

 

So now we know what DJ's hands are doing , the puzzle is figuring out 'how' he is moving his body parts to create the dynamics and geometry of his 'hand speed/path'.

Obviously , the above is just about creating clubhead speed and not the biomechanics involved in squaring the clubface (a different matter altogether).

So has anyone got any ideas how DJ creates that straight path in the downswing?

PS.

I thought it would be a good idea to show the hand path of Bobby Jones (in red below) which shows a more circular hand path , where he also had an 'earlier' natural release. He couldn't replicate the hand path of DJ because of the limitations on the strength of hickory shafts . If he tried stressing the shaft  using  DJ's hand path (ie. straight path and then speedy acute 'corner turn') the shaft would have broken.

 

Bobby Jones golf swing with red and blue curves to illustrate

 

Edited by Wildthing

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I have no idea what your saying. But it’s cool.

My though on DJ getting the straight path is because belly button is facing the target before his club is anywhere near the ball.

That 4D model of him today at the PGA was nuts. If I tried to turn that fast, far, and powerful I’d be in a wheel chair.

Has to be a super hero, that’s the only way to explain it.

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Posted (edited)
13 hours ago, Shankster said:

I have no idea what your saying. But it’s cool.

My though on DJ getting the straight path is because belly button is facing the target before his club is anywhere near the ball.

That 4D model of him today at the PGA was nuts. If I tried to turn that fast, far, and powerful I’d be in a wheel chair.

Has to be a super hero, that’s the only way to explain it.

There is a possible explanation for that straight path but its a set of moves that I cannot do without being put into traction .

Cameron Champ does it too:

ChampHandArcPath.jpg

 

Look at :

a. Their left shoulder 

b. Their upper right arm 

c. Their right lateral side bend 

d. Their right elbow.

To get that straight path they do the below almost simultaneously:

1. Pull their left shoulder towards target (this helps brings their left arm down)

2. Adduct their upper right arm towards their right side ( also helps bring the left arm down)

3. Pitch their right elbow towards their right hip (shallows their downswing plane and also stops their right arm getting blocked behind their torso)

4. Perform a lateral side bend (also helps shallow the downswing plane )

Basically , both DJ and Cameron are performing moves that help create that straighter downswing path and also shallow out their downswing planes (at the same time). So much more complex and requires great flexibility but also puts a great deal of strain on the spine. 

Bobby Jones didn't do the above and I can imagine he never had too many back problems, contrary to what I've heard about Cameron Champ  who is already suffering bulging discs at such a young age.

PS.

Just been looking at Wikipedia about Bobby Jones to see if he did have back problems as a player . He actually died of a back related disorder.  What a sad tragic end for him and his family:

Incapacity and death

In 1948, Jones was diagnosed with syringomyelia, a fluid-filled cavity in the spinal cord that causes crippling pain, then paralysis; he was eventually restricted to a wheelchair. He died in Atlanta on December 18, 1971, three days after converting to Catholicism. Jones was baptized on his deathbed by Monsignor John D. Stapleton, pastor of the Cathedral of Christ the King in Atlanta, and attended by the Jones family was buried in Atlanta's historic Oakland Cemetery. Jones was inducted into the World Golf Hall of Fame in 1974.

His widow Mary died less than four years later in 1975 at age 72, following the death of their son, Robert T. Jones III, of a heart attack in 1973 at age 47.Daughter Clara died in 1994 at age 68.

 

 

Edited by Wildthing

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