Gear effect and driver face curvature.

[mvmac]

I like the chart. What it says to me is that possible* gear effect is the same and that the bulge helps correct initial path. Too much bulge = over-correction. Too little bulge = no correction.

No.

Again, bulge and roll has nothing to do with gear effect.

More bulge will just start the ball more left or right.

This is a better example. Obviously assuming the spin axis is tilted the same amount.

Driver with less bulge starts straighter, more bulge starts slightly more right.

* The reason I used possible is because I hit plenty of balls toward the toe or the heel where the flight doesn't show any visible gear effect or even does the opposite of what a gear effect would indicate.

IMO. Present gear effect in those cases (like off of the heel for me) probably simply turns a hook into less of a hook or a draw into a straighter ball because of a bad path to face angle on that swing.

Like I said earlier, hitting it off the toe or heel doesn't guarantee the ball will curve. If I swing 8 degrees left with a face 2 left and toe it, the ball isn't going to curve left.

Hitting it off the toe can make the ball hook, draw, go straight, reduce the slice. Same thing with hitting it off the heel, depends on what the face/path relationship is.

This is why a lot of "draw" drivers have all the weight towards the heel. A center hit effectively acts like a toe strike. The toe doesn't "close" faster, it's gear effect.

[MS256]

No.

Again, bulge and roll has nothing to do with gear effect.

More bulge will just start the ball more left or right.

This is a better example. Obviously assuming the spin axis is tilted the same amount.

Driver with less bulge starts straighter, more bulge starts slightly more right.

Like I said earlier, hitting it off the toe or heel doesn't guarantee the ball will curve. If I swing 8 degrees left with a face 2 left and toe it, the ball isn't going to curve left.

Hitting it off the toe can make the ball hook, draw, go straight, reduce the slice. Same thing with hitting it off the heel, depends on what the face/path relationship is.

This is why a lot of "draw" drivers have all the weight towards the heel. A center hit effectively acts like a toe strike. The toe doesn't "close" faster, it's gear effect.

Are you kidding? That's exactly what I said. SMH!

[RandallT]

http://mytrackman.com/media/9f72695f-2dd7-41a9-9556-2056c3291078/Content/5_%20Editorial/Newsletter%2001-2013/2_pdf Page 4 of 16 here too: http://trackmangolf.com/media/9ac95035-8bd3-4cb8-9368-34a4541cab0e/-K5wWA/PDF/3.%20Newsletter/newsletter5.pdf I remember a year or two ago researching gear effect for myself and stumbling across these Trackman resources. I thought they were informative, and they align with what has been said. Just a bit more "mathy " and some quantifying numbers of the impact. A driver hit off center by one dimple results in spin that can result in 10yds left or right. 6-iron off by one dimple, just a couple yards. Edit: This quote also found in 2nd PDF: "Luckily the club manufactures have added a curvature to the club face (the bulge) on woods and drivers. This means that when you impact the ball on the heel your face angle at the impact point will most likely be closed, hereby starting the ball more left and tilting the D-plane towards a draw spin. The net effect will be a much straighter shot compared to the zero face angle situation."

http://trackmangolf.com/media/9ac95035-8bd3-4cb8-9368-34a4541cab0e/-K5wWA/PDF/3.%20Newsletter/newsletter5.pdf Oops, I copied the 2nd link wrong. Corrected. Pretty good article.

[trickyputt]

Its ok. @mvmac threw out a video link for frisbee golf, and though I was trying real hard to understand gear effect and frisbees, I suspected a slight error.

[mvmac]

Are you kidding? That's exactly what I said. SMH!

lol My bad, mis-read your post. Thought you meant something else.

Its ok. @mvmac threw out a video link for frisbee golf, and though I was trying real hard to understand gear effect and frisbees, I suspected a slight error.

What link was that?

[trickyputt]

I think you were editing the links at the time. Maybe grabbed the wrong one out of the library. It was some frisbee shot and the crowd roared at the end. I have never seen frisbee golf before, so for a bit of time there I was really wondering what you meant to explain.

[natureboy]

Could using a more straight-faced driver on the range help your ballstriking by giving you harsher feedback on off-center hits?

[mvmac]

Could using a more straight-faced driver on the range help your ballstriking by giving you harsher feedback on off-center hits?

Nah, just get a muscleback 6 iron if you want something like that.

[MS256]

Something gets lost in the translation from Hillbilly to Californian fairly often. ;-)

[Lihu]

Nah, just get a muscleback 6 iron if you want something like that.

Yeah, turns out I did a partial fracture in my index finger metacarpal by hitting a muscle-back too close to the heel last Saturday. That's where the pain is coming from. As a consequence I definitely don't grip my clubs too tight anymore.

It's healing, but it gives me great feedback of a mishit from my MP-32s.

[mvmac]

Good stuff from @cbrian .

[ChrisWev]

Good stuff from @cbrian.

Even though I'm 100% behind what he's saying I find this guy little bit hard to understand/ relate to, maybe it's because he just looks so young or it's just a different teaching method? I find it much easier by looking at how cogs work and then by Crossfields videos etc.

This guys description of the change in gear effect (specifically about how COG effects) with regard to where the tungsten weight goes is very good though.

[natureboy]

Here's some other gear effect vids.

Explanation (horizontal):

Illustration (mostly vertical):

[mvmac]

 

Good news! You don't need to strike every shot perfectly to shoot 64. Even on the PGATour! Rafael Campos, who shot 64 in Puerto Rico yesterday.

A photo posted by Andrew Rice (@andrewricegolf) on Mar 25, 2016 at 3:28am PDT