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-   -   Got Rhythm? (http://www.lynnblakegolf.com/forum/showthread.php?t=7918)

O.B.Left 01-15-2011 12:52 AM

I've seen D's Hip Action........he's got rhythm. Small "r" variety and capital R too.

I like the dance off idea though. Maybe it could be pay per view or skype or something so we can all watch it.

Bagger Lance 01-15-2011 01:12 AM

Quote:

Originally Posted by BerntR (Post 81329)

Here's for those of you who sees the difference between the same RPM and the same basic RPM:

The physics of this overtaking is such that the hands will be slowed down during the overtaking and the flat left wrist will break down prior to impact - unless the golfer does something to prevent it.

Here's a double pendulum model you can play with: http://www.maths.tcd.ie/~plynch/Swin...ependulum.html

Notice how the "flat left wrist" (the first mass) stalls and collapses shortly after the "club" (the second mass) is released.

Hit restart a few times and watch the "stroke". Then change parameters. Increase the first mass significantly and see what happens.

Of course in the golf stroke we have to substitute this mass increase with lag pressure regulation (linear force).

First of all, this is a great dialog that I didn't expect. I like the civil discourse.

No doubt the hands slow as the heavy clubhead begins overtaking at release. But there is also a supporting mechanism; that is a turning left shoulder and an extending right arm (paddlewheel motion) providing resistance, because they are supporting the flat left wrist and intended hinge action through impact. If this is part of what you mean by Basic Rhythm then I think I understand where you are coming from.

Homer used crankshaft RPM as the model. Even though the piston is connected to a crankshaft spinning at 3000RPM, the piston is going from 0 to 75MPH in less than 9 inches (my rough estimate). If there was a way to measure piston RPM, it would be much higher than the crankshaft as it accelerates to full extension, but that's not the what the gauge on my car is measuring. In the golfing machine, the crankshaft is the left arm flying wedge rotating through impact. Everything supporting that includes spark plugs, fuel, air, and oil. If those are out of whack, its time for a tune up.

O.B.Left 01-15-2011 01:51 AM

Im just reading all of these posts for the first time. Interesting stuff.

Hope Im not covering old ground but BerntR from a pure golf perspective Ive always considered the flat left wrist to be a Rhythm enabler and "ROLLING" as a Flat Left Wrist maintainer. Is this correct in a scientific sense or is this just a golfer talking feels or something?

To my mind its as if the left wrist will be broken by an insurmountable force unless its rolled in some manner. Hence you cant try to merely hold it flat , you have to Roll it flat..... to coin a phrase.

My apologies if Im digressing or regressing conversationally.

Bagger Lance 01-15-2011 02:03 AM

Quote:

Originally Posted by O.B.Left (Post 81359)

Hope Im not covering old ground but BerntR from a purely golf perspective Ive always considered the flat left wrist to be a Rhythm enabler and "ROLLING" as a Flat Left Wrist maintainer. Is this correct in a scientific sense or is this just a golfer talking feels or something?

To my mind its as if the left wrist will be broken by an insurmountable force unless its rolled in some manner. Hence you cant try to merely hold it flat , you have to Roll it flat..... to coin a phrase.

My apologies if Im digressing or regressing conversationally.

Yes-sir. On both.

I had a light bulb go on a few years back when Ted told me about roll'in. I'm a steer'in kinda guy and that cured my illness of steer'in and flip'in and cow tip'in. Not really, I still tip cows.

There are only two people who are allowed to apologize on this site when posting and you ain't one of em.

O.B.Left 01-15-2011 02:32 AM

Quote:

Originally Posted by Bagger Lance (Post 81360)
Yes-sir. On both.

I had a light bulb go on a few years back when Ted told me about roll'in. I'm a steer'in kinda guy and that cured my illness of steer'in and flip'in and cow tip'in. Not really, I still tip cows.

There are only two people who are allowed to apologize on this site when posting and you ain't one of em.

Hah thats funny it was Ted who pointed that Rollin thing out to me too. Kinda works pretty good doesnt it? If you're Steering the face and left hand straight to the hole and swinging at speed ........that left wrist will break. Your Taly'll get all messed up. But if you Roll your Taly.......so to speak.

Homer said that a student of his had a swing that improved just by understanding the proper impact geometry and the ball flight laws, nothing else. An intellectual cure for Steering.

Digression and regression at the same time? Now were getting somewhere.

drewitgolf 01-15-2011 12:31 PM

You Won't Flip Over This Video
 
Quote:

Originally Posted by Bagger Lance (Post 81360)
Yes-sir. On both.

I had a light bulb go on a few years back when Ted told me about roll'in.

Is this what you mean for the veiwing audience?

http://www.youtube.com/watch?v=Z4-KX...ayer_embedded#!

Watch the first five and a half minutes. Ted at his best.

innercityteacher 01-15-2011 01:30 PM

OK, I apologize!
 
Quote:

Originally Posted by Bagger Lance (Post 81360)
Yes-sir. On both.

I had a light bulb go on a few years back when Ted told me about roll'in. I'm a steer'in kinda guy and that cured my illness of steer'in and flip'in and cow tip'in. Not really, I still tip cows.

There are only two people who are allowed to apologize on this site when posting and you ain't one of em.

I'm really sorry and I'll try to do better! :)


ICT

Bagger Lance 01-15-2011 01:57 PM

Quote:

Originally Posted by innercityteacher (Post 81376)
I'm really sorry and I'll try to do better! :)


ICT

Innercity,
Sorry, you aren't allowed to apologize. :eyes:

The whereabouts of the members who can apologize are unknown. They are most likely snowbound somewhere on the Eastern seaboard.

O.B.Left 01-15-2011 05:39 PM

Quote:

Originally Posted by drewitgolf (Post 81373)
Is this what you mean for the veiwing audience?

http://www.youtube.com/watch?v=Z4-KX...ayer_embedded#!

Watch the first five and a half minutes. Ted at his best.


Isnt that great! Now thats how Homer's Impact Geometry and the Alignments that relate directly to it can be taught to the masses.

Ted's right down where it matters , where the rubber meets the road, this is the stuff that kids who learn the game with ease do that old hackers never get right.

airair 01-15-2011 05:43 PM

Tempo and rhythm
 
Is this video relevant?

http://www.youtube.com/watch?v=xFw6k...eature=related

BerntR 01-15-2011 06:12 PM

Quote:

Originally Posted by Bagger Lance (Post 81356)
Homer used crankshaft RPM as the model. Even though the piston is connected to a crankshaft spinning at 3000RPM, the piston is going from 0 to 75MPH in less than 9 inches (my rough estimate). If there was a way to measure piston RPM, it would be much higher than the crankshaft as it accelerates to full extension, but that's not the what the gauge on my car is measuring. In the golfing machine, the crankshaft is the left arm flying wedge rotating through impact. Everything supporting that includes spark plugs, fuel, air, and oil. If those are out of whack, its time for a tune up.

Thanks for great clarification effort Bagger,

That could mean that TGM basic RPM in the definition refers to the RPM of the hands.

Bagger Lance 01-15-2011 06:30 PM

Air,
I gotta take your vids of Hibbard and Clement down. No offense, but they aren't LBG certified instructors and they aren't talking about Golfing Machine Rhythm. Their's is the popular definition.

Rhythm and Tempo can be related, but they are not the same in the golfing machine.

And I'd like 20 minutes of my life back please.:laughing9

airair 01-15-2011 06:38 PM

Sorry
 
Quote:

Originally Posted by Bagger Lance (Post 81383)
Air,
I gotta take your vids of Hibbard and Clement down. No offense, but they aren't LBG certified instructors and they aren't talking about Golfing Machine Rhythm. Their's is the popular definition.

Rhythm and Tempo can be related, but they are not the same in the golfing machine.

And I'd like 20 minutes of my life back please.:laughing9

:sad2: ....

I thought Hibbard's movements reminded me of the MacDonald drills.

BerntR 01-15-2011 06:41 PM

Quote:

Originally Posted by O.B.Left (Post 81359)
Im just reading all of these posts for the first time. Interesting stuff.

Hope Im not covering old ground but BerntR from a pure golf perspective Ive always considered the flat left wrist to be a Rhythm enabler and "ROLLING" as a Flat Left Wrist maintainer. Is this correct in a scientific sense or is this just a golfer talking feels or something?

To my mind its as if the left wrist will be broken by an insurmountable force unless its rolled in some manner. Hence you cant try to merely hold it flat , you have to Roll it flat..... to coin a phrase.

My apologies if Im digressing or regressing conversationally.

That's how I see it too.

In theory I guess you could use a strong double action grip, just cock and recock both hands through the swing - angled hinging without turn and roll. But I guess it would be very difficult to monitor and control the club that way.

Daryl 01-15-2011 06:51 PM

Angular Speed - RPM - Rhythm

The Left Wrist and Clubhead should travel at the same Angular Speed.

Quote:

2-P.....The true Angular Speed (RPM) of the Clubhead is identical to that of the Hands due to the mandatory Flat Left Wrist. See 2-N-1 and sketch 2-K#5. So as the Clubhead moves from minimum to maximum radius, its Surface Speed (6-N-0) in miles per hour (MPH) increases geometrically.
Quote:

6-N-0.....The earlier in the Downstroke the Release occurs, the larger, longer and slower the Release Arc will be for both Clubhead and Hands. Other things being equal, this will require higher Hand Speed to produce yardages equivalent to that of the short quick arc of Maximum Delay. This involves Angular Speed which is measured by the number of degrees of an Arc through which the motion moves per second. From Release to Impact is just so many degrees of travel – at the Left Shoulder and/or at the Left Wrist. Doubling the travel time (for instance) halves the travel rate. Also see 2-P and 7-23.
One of my favorites,
Quote:

7-23...The sharpness of the arcs at either end of “Line” Paths determines how much of that “Line” can remain and how much the change from Linear Speed (Downstroke) to Angular Speed (Release) will increase Clubhead Speed without changing Hand Speed – the “Endless Belt Effect” of #3 Accumulator per 2-K#6 and 6-B-3-B.

BerntR 01-15-2011 07:11 PM

Yes.

The hands are attached to the club so the angular speed will be the same. But the arms will have lower angular speed. Both Accumulator #2 and #3 are enablers for higher angular speed in the club than in the arms.

Bagger Lance 01-15-2011 07:20 PM

Quote:

Originally Posted by airair (Post 81384)
:sad2: ....

I thought Hibbard's movements reminded me of the MacDonald drills.

Yes, there was some MacDonald Drills in there. Its the instructor thing. Can't promote others outside of our circle of friends without Yoda's OK.

Don't be sad, we'll get this all worked out. Its a complex subject and Bucket beat me up pretty good in our last round.

http://www.lynnblakegolf.com/forum/thread4716.html

airair 01-15-2011 07:29 PM

Quote:

Originally Posted by Bagger Lance (Post 81391)
Yes, there was some MacDonald Drills in there. Its the instructor thing. Can't promote others outside of our circle of friends without Yoda's OK.

Don't be sad, we'll get this all worked out. Its a complex subject and Bucket beat me up pretty good in our last round.

http://www.lynnblakegolf.com/forum/thread4716.html

No problem. I'm not that sad after all. :crybaby:

http://www.youtube.com/watch?v=rL7mF...eature=related

Bagger Lance 01-15-2011 07:50 PM

Quote:

Originally Posted by BerntR (Post 81390)
Yes.

The hands are attached to the club so the angular speed will be the same. But the arms will have lower angular speed. Both Accumulator #2 and #3 are enablers for higher angular speed in the club than in the arms.

Agreed, but angular speed is measured in RPM, so even though the club is traveling faster in MPH in relation to the left arm, RPM is the same because left arm, left wrist and club are in line.

Nice references Daryl. Made me look at 2K-5 and low and behold, #3 roll power. Look carefully at the difference between 2K-4 and 5. There'in is rhythm.

airair 01-15-2011 08:38 PM

Lucky is a golfer who can say:

http://www.youtube.com/watch?v=vIpNepgmCQA&NR=1

BerntR 01-16-2011 01:13 AM

Quote:

Originally Posted by Bagger Lance (Post 81395)
Agreed, but angular speed is measured in RPM, so even though the club is traveling faster in MPH in relation to the left arm, RPM is the same because left arm, left wrist and club are in line.

The hands and the club have the same RPM. There is no alternative as long as you hold your grip throughout. But the arms have lower RPM than the club.

I am not confusing RPM with MPH. I've even explained in an earlier post why the MPH diffence between hands speed and clubhead speed can't be explained without a significant RPM difference being present. But you seem to read my posts with less presicion than I write them. My English may not be the most eloquent. But I make an effort to be clear and precise on such matters. It doesn't help much if the reader doesn't appreciate the clarity though.

Bagger Lance 01-16-2011 01:34 AM

Some background on the editions.

Like so many golfing machine concepts, rhythm is hard to grasp not only because Homer used a word that has an intuitive meaning to most people, but also because the importance and precision of Homer's definition doesn't resonate with most people...until it is distilled and explained by great teachers.

He didn't fully define rhythm or mention it(I haven't found any use of the word) until the 4th edition. The development of the concept was important in describing accumulator #3 (6-B-3-0) The Third Power Accumulator - Roll Power.

Starting with 4th edition, Homer expanded 2-P to include the concept of rhythm when describing the function of wristcock. The term wasn't included in prior editions in this context. He also added the "golfers flail" sketches in 2K. Likewise, the Homer hadn't fully developed the concept of the physics of Hinging until the 4th edition in 2-G.

In the 4th edition he also expanded 2-G, the physics of hinging for hitting and swinging was that, "Roll is actually imparted by the turning torso and/or the orbiting arms per 2-K4 and 2-K5...The point to be learned here is that the Club, because of the Flat Left Wrist, must always travel at the same RPM as the Arms and reproduce the Hinging inherent in the selected Lag Loading procedure (10-19) per 4-D, 9-2, and 9-3, regardless of Clubhead Extention velocity. This is the basis of Golf Stroke Rhythm". In the 5th edition he removed the last sentence and replaced it with "See 2-P".

Thanks for the reply Bernt. I'll reread your earlier post and try to reconcile it. You're probably on to something.

Bagger Lance 01-16-2011 02:19 AM

Quote:

Originally Posted by BerntR (Post 81306)
Technical reasoning:
If they move at the same RPM and the clubshaft is twice as long as the left arm, the clubhead speed would be 3 times as fast as the hands speed - all due to increased swing radius. With a hand speed of 15 MPH that gives you a club head speed of 45 MPH. A shaft that is twice as long as your arm is probably an illegal driver so the 45 MPH figure can safely be regarded as a theoretical maximum.Now, if the club head speed really is 100 MPH, you have at least 55 MPH that aren't yet accounted for. You need higher RPM to explain it.

A more golf like explanation:
You don't have to be a mechanical engineer to get this. Remember that between 9 and 3 (as in a 9-3 drill), the left arm goes from parallel to parallel (to the plane line) while the club shaft goes from vertical to vertical. Parallel to parallel means that the left arm rotates 180 degrees. Vertical to vertical means that the club shaft rotates 360 degrees. So in average for the 9-3 motion, the shaft has twice as high RPM as the left arm from 9-3. If you account for a late release here, we are certainly talking about a much higher RPM difference through impact.

Only if you zero accumulator #2 and #3 (or freeze them) will you get the same RPM for arm and club shaft. I guess some does that with the putter but that would be the only shot where this is possible.

If I understand correctly, you are differentiating arm/hand RPM from clubhead RPM.
Viewed as separate entities, the clubhead has much greater travel and speed than arms/hands.

The difference:
As the left arm flying wedge, clubhead/shaft, left wrist, and arm are combined into a three sided triangle. The left arm flying wedge is viewed as a dynamic unit in motion. One corner is left shoulder, the other corner is left wristcock, and the third corner is clubhead.

Viewed as a wedged shaped triangle the entire unit travels at the same RPM from the shoulder, even though two sides of the triangle nearly come together or combine with the third side momentarily if accumulator 2 & 3 are zeroed out at low point. So while in motion, there is clubhead overtaking, i.e. one side of the triangle between clubhead and shoulder lengthens, but the overall wedge rotates at the same RPM speed.

It is a two dimensional flying wedge set on the plane of the left wristcock motion. If it goes 3D or ceases to be a triangle due to clubhead throwaway, then rhythm has been lost.

I wish we had an animation artist around to show this.

Daryl 01-16-2011 03:41 AM

Per Bagger:

Shown is the Plane of the Left Wrist Cock (the Left Arm Wedge). Unfortunately, you don't see the rotation of the Plane as the Uncocking progresses as the Left Arm Wedge gets closer to impact. You'll need to use your 3D brain to visualize the rotation.


david sandridge 01-16-2011 08:14 AM

I get tired of copying and pasting all the good comments and drawings on this forum to a file now called "Best of Lynn Blake 4". Golly Lynn should just write a book with Daryl doing the illustrations. What a great presentation of the flying wedge. Now if Daryl could animate could have one figure with left arm flying wedge in the yellow color, then another figure of right arm flying wedge in red all in motion. Then both together. Then add in appropriate music. Then work it out so we could program it to change plane, lie, speed etc. Then of course could overlay the wedges on a pro golfers swing making the planes transparent. Even a better idea would use Lynn's swing and overlay the planes on his motion. He could then demo hinging swinging and hitting with the wedges overlaid. I can see it now an ebook that would teach golf incorporating lynn's swing and Daryl's drawings all set into motion.
Of course that ebook would also have the yellow book digitized so it could be searched. Notes included would reference the yellow book and then you could click on it and it would pop right up. then additional buttons would be available to bring up additional yellow book stuff that would be appropriate. Then you could put it all on your ipad and take it to the range. Of course the new ipad will have two cameras. The one for golf could have the high speed camera with swing analyzing software. Don't forget they are now developing a device to attach to the club that will replace trackman!. Probably have devices to clip to your shoulders leg and head that will provide 3D analysis. New golf caps will have have heads up displays for practice to help your adjust "your machine".
It's all coming

airair 01-16-2011 08:36 AM

Quote:

Originally Posted by david sandridge (Post 81410)
I get tired of copying and pasting all the good comments and drawings on this forum to a file now called "Best of Lynn Blake 4". Golly Lynn should just write a book with Daryl doing the illustrations. What a great presentation of the flying wedge. Now if Daryl could animate could have one figure with left arm flying wedge in the yellow color, then another figure of right arm flying wedge in red all in motion. Then both together. Then add in appropriate music. Then work it out so we could program it to change plane, lie, speed etc. Then of course could overlay the wedges on a pro golfers swing making the planes transparent. Even a better idea would use Lynn's swing and overlay the planes on his motion. He could then demo hinging swinging and hitting with the wedges overlaid. I can see it now an ebook that would teach golf incorporating lynn's swing and Daryl's drawings all set into motion.
Of course that ebook would also have the yellow book digitized so it could be searched. Notes included would reference the yellow book and then you could click on it and it would pop right up. then additional buttons would be available to bring up additional yellow book stuff that would be appropriate. Then you could put it all on your ipad and take it to the range. Of course the new ipad will have two cameras. The one for golf could have the high speed camera with swing analyzing software. Don't forget they are now developing a device to attach to the club that will replace trackman!. Probably have devices to clip to your shoulders leg and head that will provide 3D analysis. New golf caps will have have heads up displays for practice to help your adjust "your machine".
It's all coming

LOL :laughing9 :laughing1

Bagger Lance 01-16-2011 12:04 PM

Quote:

Originally Posted by Daryl (Post 81402)
Per Bagger:

Shown is the Plane of the Left Wrist Cock (the Left Arm Wedge). Unfortunately, you don't see the rotation of the Plane as the Uncocking progresses as the Left Arm Wedge gets closer to impact. You'll need to use your 3D brain to visualize the rotation.


Awesome Daryl - Just as I see it in my minds eye, except in motion, rotating and blue.
Blue is the color of my wedgie.

Thanks!

Daryl 01-16-2011 12:39 PM


BerntR 01-16-2011 12:40 PM

Just as I see it too. The club rotates ca 120 deggrees in that figure while the arm rotates 45. That is based on their angle away from vertical when the motion starts.

Bagger,

Naturally I agree with your description of the flying wedge. There's however nothing in there that disputes that the club has higher RPM than the right arm.

Daryl 01-16-2011 12:51 PM

Quote:

Originally Posted by BerntR (Post 81417)
Just as I see it too. The club rotates ca 120 deggrees in that figure while the arm rotates 45. That is based on their angle away from vertical when the motion starts.

Bagger,

Naturally I agree with your description of the flying wedge. There's however nothing in there that disputes that the club has higher RPM than the right arm.

Hmm? RPM refers to the Plane of the Left Wrist Cock, not the Wrist Cock. The Wrist Cock occurs in a Vertical Plane. RPM occurs in the Horizontal Plane.

How many Revolutions per Minute is the Clubhead completing?
How many Revolutions per Minute is the Left Wrist completing?


Bagger Lance 01-16-2011 01:05 PM

Quote:

Originally Posted by Daryl (Post 81416)

PM me an address where I can send you the Arturo Fuente Opus X. :eyes:

Daryl 01-16-2011 01:18 PM


BerntR 01-16-2011 02:11 PM

Two different rotation planes.
 
I see where you are going, Daryl. The last figure descibes the rotation of the Left Arm Flying Wedge in a horizontal hinging procedure. The LAFW rotates on a plane that is on right angles to the inclined plane.

But it is the on-plane rotation* that is the big deal. The rotation that happens on the inclined plane. The plane the clubhead moves on. That's the plane we have to look at when we consider hand speed and clubhead speed, and RPM vs MPH.

The rotation of the LAFW is just a secondary rotation in the golf stroke. Amongst other things it causes the club to rotate around its own sweeet spot. It is an important enabler for what we want to achieve on the main stage. The RAFW rotation enables us to add club rotation by uncocking (turning) and recocking the Left Wrist (accumulator #2) and by simply turning (accumulator #3). These two releases produces on-plane club rotation without producing on-plane arm rotation. And that's what makes the huge difference between club rotation and left arm rotation in the golf stroke.


* A rotation that is on plane has a rotation axis that goes straight through the plane.

Daryl 01-16-2011 02:25 PM

Quote:

Originally Posted by BerntR (Post 81421)
I see where you are going, Daryl. The last figure descibes the rotation of the Left Arm Flying Wedge in a horizontal hinging procedure.

That is perfectly True. You understand that.

Quote:

Originally Posted by BerntR (Post 81421)
The LAFW rotates on a plane that is on right angles to the inclined plane.

No.. The LAFW rotates on one of three associated Planes. Horizontal, Vertical or Angled.

Quote:

Originally Posted by BerntR (Post 81421)
But it is the on-plane rotation* that is the big deal. The rotation that happens on the inclined plane. The plane the clubhead moves on. That's the plane we have to look at when we consider hand speed and clubhead speed, and RPM vs MPH.

* A rotation that is on plane has a rotation axis that goes straight through the plane.

No..That's a Swivel, not a Hinge.

Hinging:

It is said that Hinging controls the Clubface alignment. It controls the Clubface Alignment to an associated Plane. Hinging is not what squares the Clubface for Impact.

Horizontal Hinge: causes he Clubface (and Left Arm Wedge) to rotate on a Horizontal Plane
Angled Hinging: causes the Clubface (and Left Arm Wedge) to rotate on an Angled Plane


BerntR 01-16-2011 02:51 PM

Quote:

Originally Posted by Daryl (Post 81422)
No.. The LAFW rotates on one of three associated Planes. Horizontal, Vertical or Angled.

Different words, and your way of saying this is perhaps more in line with TGM. But the point is that the LAFW is vertical to the swing plane at low point and parallel to the inclined plane somewhere in the upstroke. And the Hand club is supposed to be on plane at all times. At least for a swinger.

Nevertheless it's the rotation of arm and club on plane that matters when we discuss RPM and MPH.

dlam 01-16-2011 04:09 PM

This thread really good!
helps me rethink about rhythm.
I just know that the rate of my pivot turning on the incline plane ideal should be the same rate of rotation of the clubshaft in a counterclockwise direction on the downswing.
It often isn't and can be a bit slower or faster than the pivot RPM. How it mismatches together(can be done on purpose) can be used to hit a fade or draw.

Mike O 01-16-2011 04:26 PM

Quote:

Originally Posted by Daryl (Post 81418)
Hmm? RPM refers to the Plane of the Left Wrist Cock, not the Wrist Cock. The Wrist Cock occurs in a Vertical Plane. RPM occurs in the Horizontal Plane.

How many Revolutions per Minute is the Clubhead completing?
How many Revolutions per Minute is the Left Wrist completing?


Daryl,
Not sure why you haven't acknowledged Bernt's explanations of different RPM's for the left arm versus the clubshaft. I think he explained it clearly enough - If you have any left forearm rotation/upper arm rotation on the downswing - it will create greater RPM for the clubshaft than the arm.

It's important to understand Homer Kelley's context when he writes - this RPM discussion is similar to his writing's on wristcock or other concepts. When he describes wristcock as a vertical motion - doesn't mean that the left wrist is always vertical to the ground and it's motion is always vertical to the ground - becuase obviously it's not vertical to the ground and therefore it's not always making it's cocking motion vertical to the ground. If it did then yes the RPM's would be the same for the clubshaft and the arm - however in the real golfer the left wrist is rotating throughout the stroke (in relation to the ground). Look at 2K#4 and 2K-#5 - for on plane left wrist motion or vertical wrist action. Similarly 7-18 2nd paragraph discussing hand and clubhead RPM's the same - ASSUMING you are looking at an endless belt example 2-K#6.

He's writing in a certain context - part of that context is the fact that the biggest problem he saw was clubhead throwaway (different RPM's for the hands and the clubshaft given the most basic flail drawing). Much as he had said - in regards to hinge action - "no one does these things "perfectly" - perfectly meaning exactly horizontal or angles, or vertical - perfectly isn't used in regards to "optimal".

I feel it's important to understand the relevance of Homer Kelley's writings yet at the same time understand real issues/happenings as Bernt is noting in regards to noted differences in RPM's.

O.B.Left 01-16-2011 05:03 PM

Quote:

Originally Posted by Mike O (Post 81429)
Daryl,
Not sure why you haven't acknowledged Bernt's explanations of different RPM's for the left arm versus the clubshaft. I think he explained it clearly enough - If you have any left forearm rotation/upper arm rotation on the downswing - it will create greater RPM for the clubshaft than the arm.

It's important to understand Homer Kelley's context when he writes - this RPM discussion is similar to his writing's on wristcock or other concepts. When he describes wristcock as a vertical motion - doesn't mean that the left wrist is always vertical to the ground and it's motion is always vertical to the ground - becuase obviously it's not vertical to the ground and therefore it's not always making it's cocking motion vertical to the ground. If it did then yes the RPM's would be the same for the clubshaft and the arm - however in the real golfer the left wrist is rotating throughout the stroke (in relation to the ground). Look at 2K#4 and 2K-#5 - for on plane left wrist motion or vertical wrist action. Similarly 7-18 2nd paragraph discussing hand and clubhead RPM's the same - ASSUMING you are looking at an endless belt example 2-K#6.

He's writing in a certain context - part of that context is the fact that the biggest problem he saw was clubhead throwaway (different RPM's for the hands and the clubshaft given the most basic flail drawing). Much as he had said - in regards to hinge action - "no one does these things "perfectly" - perfectly meaning exactly horizontal or angles, or vertical - perfectly isn't used in regards to "optimal".

I feel it's important to understand the relevance of Homer Kelley's writings yet at the same time understand real issues/happenings as Bernt is noting in regards to noted differences in RPM's.



Great point, thanks.

The other little issue with the drawing is that the club always lays flat on the inclined plane , cocks up and down on the inclined plane , but the left arm is not on the Inclined Plane given any #3 Angle. The left arm and the Inclined Plane are only one and the same for the so called "theoretical left shoulder plane" , which is what seems to depicted here. For the more golf like plane angles the golf club does not cock in the direction of the left arm or the left shoulder. Meaning that blue Left ARm Flying wedge does not attach to the left arm and shoulder throughout the entire swing. At top it lays on the Inclined Plane, between the two arms. When the Left Wrist rolls off the Inclined Plane the Left ARm Flying Wedge does the same. At impact , through the ball they are as drawn.

I think. Its a head scratcher I know.

Could this be another reason for the use of the word "basic" in "basic rpm's"?

Daryl 01-16-2011 05:48 PM

Quote:

Originally Posted by Mike O (Post 81429)
Daryl,
Not sure why you haven't acknowledged Bernt's explanations of different RPM's for the left arm versus the clubshaft. I think he explained it clearly enough - If you have any left forearm rotation/upper arm rotation on the downswing - it will create greater RPM for the clubshaft than the arm.

I didn't acknowledge "Bernt's explanations of different RPM's for the left arm versus the clubshaft" because it's irrelevant.

Strap a board to your left Arm, Wrist and Clubhead. If they all stay against the board (Aligned) through the Impact Interval, they traveled at the same RPM. Strap the board to your left forearm, wrist and Clubhead and they travel at the same RPM.

Mike, do you "Understand"? RPM is not Turn and Roll. The Primary Lever stays Aligned regardless of the Turn and Roll. Maintaining the same RPM is necessary for Hinge Action but RPM is not Hinge Action. If the Left Wrist is Bent through Impact, I can still Hinge the Left Wrist however, the Clubface will be somewhere else. We need a Flat Left Wrist (RPM) so that anything the Wrist does, the Clubface will do likewise, and not something else.

Quote:

The point to be learned here is that the Club, because of the Flat Left Wrist, must always travel at the same RPM as the Arms and reproduce the Hinging inherent in the selected Lag Loading procedure (10-19) per 4-D, 9-2 and 9-3, regardless of Clubhead Extension velocity. See 2-P and 7-18.
Thank you sooo much for the gracious Primer on the Left Wrist Vertical Cock and Uncock geometry - MPH. Why don't hold onto that thought while you learn about Horizontal Bend and Arch - RPM. :)

Maybe I'll buy you a "Taly" for your birthday. It's an RPM trainer. Right?

Bagger Lance 01-16-2011 06:14 PM

Quote:

Originally Posted by O.B.Left (Post 81430)
Great point, thanks.

The other little issue with the drawing is that the club always lays flat on the inclined plane , cocks up and down on the inclined plane , but the left arm is not on the Inclined Plane given any #3 Angle.

OB
Daryl's drawing wasn't focused on the inclined plane, but the drawing is still relevent to it. The bottom edge of the triangle (clubshaft) is lying on the inclined plane from release to follow-though. The other lines are not related to the inclined plane, but are related to the plane of the left wristcock motion.

He could make it fancier to show the inclined plane/sweetspot plane, but I'm pretty happy with the artwork.


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