primary lever length at impact

[innercityteacher]

When the Physics may become complicated a little data may help:

http://www.mytpi.com/images/pdfs/Kin...nDownswing.pdf

HB

When I load Extensor Action for Hitting or Swinging I gain power but I also have biological limitations like how fast my old stuff moves. A slight shift left and the club fires full of EA pop! Then it's over! I really do not want to control anything but my chips and putts.

ICT

[MizunoJoe]

Agreed constant hand speed is assumed in the endless belt analogy for illustrative purposes only. Actual constant hand speed when swinging would imply no rate of acceleration therefor no Lag Pressure wouldn't it? Something a few GSED's got wrong maybe? You don't want to swing the hands at a constant speed......and how could you do that anyways? Slow and steady acceleration may feel like a constant hands speed however...

That's the point, because of the physics, you can't.

[MizunoJoe]

When the Physics may become complicated a little data may help:

http://www.mytpi.com/images/pdfs/Kin...nDownswing.pdf

HB

Thanks HB. I was wrong about the clubhead slowing before impact for the pros. I was sure the max club head speed occurred at the kick point, at which time I thought the clubhead, having passed the shaft was very slightly retarded by it. Apparently this is only true for (most/some?) amateurs.

[whip]

Mike o I'm going to change back to my original statement that once the lever is at full extension that us the maximum speed #3 supplies power but I don't think t speeds up at that point because of it

[whip]

That's the point, because of the physics, you can't.

Please explain this

[whip]

When snap releasing, the hands slow precipitously in the release interval. They also slow in a sweep release, but not as dramatically. Constant hand speed exists only in the endless belt model.

remember the hands themselves are going around the pulley also, they ain't slowing down Joe

[MizunoJoe]

remember the hands themselves are going around the pulley also, they ain't slowing down Joe

Too bad HB's Physics article didn't include hand speed, but I think you can extrapolate it from the pro and am1 lead arm graph(blue), which decelerates rapidly through release. It would be hard for the hands to continue at a constant speed while the arm to which they're attached, is decelerating. The reason is that as the left wrist uncocks, the left arm is dragging an ever heavier load as the shaft and left arm head toward the in-line condition. Note that amateur 2 actually speeds up his left arm during release, which seems like a good idea(who here hasn't tried it, including me some time ago! ), but is not.

[HungryBear]

I would lay a little TGM on the physics:

http://www.mytpi.com/images/pdfs/Kin...nDownswing.pdf

Useing the pro model only. ( who knows what the amatures are doing?)

1. Nice RHYTHM.
2. Assuming- a flat left hand and bent right wrist with on plane forearm- the HANDS move with and seen as part of the club, not the arm.
3. See the geometric release of #2 (THE VELOCITY ACCUMULATOR), as the true velocity accumulator
4. See #3 (TRANSFER) by comparing the arm rotational velocity to the club rotational velocity and noting the overtaking effect of #3 accumulator


Just my observation

HB

[whip]

Too bad HB's Physics article didn't include hand speed, but I think you can extrapolate it from the pro and am1 lead arm graph(blue), which decelerates rapidly through release. It would be hard for the hands to continue at a constant speed while the arm to which they're attached, is decelerating. The reason is that as the left wrist uncocks, the left arm is dragging an ever heavier load as the shaft and left arm head toward the in-line condition. Note that amateur 2 actually speeds up his left arm during release, which seems like a good idea(who here hasn't tried it, including me some time ago! ), but is not.

Does any of this data show that you can't have a constant handspeed? No

[MizunoJoe]

Does any of this data show that you can't have a constant handspeed? No

In fact, the Am #2 data show that you can speed them up, but you shouldn't! I'm willing to bet he's a Switter. Having dumped his accumulators too soon, he then stifles CF by firing his right tricep. The point is that it requires hand/arm manipulation to prevent their slowing in the uncocking phase.

The one most important thing which jumps out from the study is that good players delay their accumulator dumps, while ordinary ones don't. If you want maximum club head speed, you pivot lag #4, and then take #2 deep down plane before releasing, or better yet, increase it with down-cocking. The better you lag #2, the more the hands will slow down in the free-wheeling stage, provided you don't interfere.