Prestressed Shaft and Impact Deceleration

[Rhythm]

We have some footage of players at the Zurich taken with a very high speed camera. We have exactly the type of pictures you want to see. And they will blow your mind when you see how much the shaft is stressed during these points during the swing. I had no idea the shaft actually bends this much. If you can tell me how to post some sings from V1 I can show what I am talking about. Incredible.

[12 piece bucket]

Thanks Lynn! Great addition to this thread!

Just for my curiosity can you or someone else reference where he says the "wallop of centrifugal force" in the book- I believe it's there but am blanking out where to look.

Actually, never mind- I found it in 6-F-1 "Right" Timing...."Acceleration ceases when the speed it has produced equals that of the Thrust, and though the thrust is still present and able to maintain Velocity, it loses the flexed, stressed Clubshaft (Hitters) and the wallop of the Centrifugal Force (Swingers)."

Mike-O-the-Psycho,

6-F-1 “RIGHT” TIMING Maximum Force is delivered by maximum Thrust (muscular and/or centrifugal) near – but prior to – full extension.

Acceleration ceases when the speed it has produced equals that of the Thrust, and though the Thrust is still present and able to maintain Velocity, it loses the flexed, stressed Clubshaft (Hitters) and the wallop of the Centrifugal Force (Swingers).

How's the rash by the way?

Bucket

[Yoda]

We have some footage of players at the Zurich taken with a very high speed camera. We have exactly the type of pictures you want to see. And they will blow your mind when you see how much the shaft is stressed during these points during the swing. I had no idea the shaft actually bends this much. If you can tell me how to post some sings from V1 I can show what I am talking about. Incredible.

Chris needs help to help us, Bambam. Go get'em!

[jmessner]

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Some pictures showing these bends would be nice... or are they too subtle to see?

I'll show a couple, but I'm looking forward to the high-speed images from Rhythm. Most video cameras take 60 fields (or 30 frames per second) and it's hard to get a good field at just before impact. I've taken a couple of images from my CSwing video analysis program and yes the bends are kind of subtle but they are there. See what you think. Scott Verplank and Zach Johnson.

[armourall]

Lynn, it would be great to see you in front of a high speed camera executing both Swinging and Hitting procedures to capture the shaft bend for each.

I know you have no problem with typing "a thousand words" to describe it, but wouldn't a picture be easier?

[Daryl]

This thread has me particularly concerned about what I'm reading. Maybe I'm confused. (I just got a headache and took three Advil) It has always been and still is my understanding that one of the most important concepts in TGM, and it may be what everything boils down to, is a Pre-Stressed Clubshaft at impact for both Swingers and Hitters. The Bend is in the shape of a crescent, with the clubhead trailing the bent shaft, not leading it as the pictures above illustrate.

The purpose of a pre-bent clubshaft is to guard against impact deceleration. It's been my understanding that if you fail to pre-stress (bend) the shaft, the impact certainly will, with a loss of clubhead mass and speed at separation. Without pre-stressing the clubshaft then all the pre-impact work was for almost nothing.

Lag pressure, including swingers, is needed not only to trace the plane line but to maintain the pre-stressed clubshaft through impact and even till follow through. One should be able to feel the bend, at all times throughout the swing, and especially between release and impact. That's what the yellow book is all about (the other 241 pages are important too).

If centrifugal force stiffens the clubshaft and replaces the need for a pre-stressed clubshaft, then I'm going to stop swinging and become a Hitter. (as a Switter, I'm half way there anyway) Clear the lesson book Ted.

[Yoda]

Lynn, it would be great to see you in front of a high speed camera executing both Swinging and Hitting procedures to capture the shaft bend for each.

I know you have no problem with typing "a thousand words" to describe it, but wouldn't a picture be easier?

There is an extremely good chance we will be doing something soon. The folks at the Titlelist Performance Institute in Oceanside, California, have invited a short list of us out to do just this kind of thing. Their camera runs at 10,000 frames per second.

That should do it!

[12 piece bucket]

I'll show a couple, but I'm looking forward to the high-speed images from Rhythm. Most video cameras take 60 fields (or 30 frames per second) and it's hard to get a good field at just before impact. I've taken a couple of images from my CSwing video analysis program and yes the bends are kind of subtle but they are there. See what you think. Scott Verplank and Zach Johnson.

Do y'all think we're seeing Sequenced Release here? Or are these cats playing with a 10-2-D grip?

[tongzilla]

Do y'all think we're seeing Sequenced Release here? Or are these cats playing with a 10-2-D grip?

Does the Clubface 'match' the back of the left hand?

[ThinkingPlus]

Does the Clubface 'match' the back of the left hand?

It looks like both are timing the flip a little to me. Like maybe the left wrist is in the process of bending through impact. That might explain the forward bend as the response to the lost lag pressure. Sproing!!!

Or maybe I am full of shi....pping containers on my door step. It is the buying season, isn't it?