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COG

  • 12:41PM - Jul 31, 2008RE: COG

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    word, regarding the actual vertical centers of gravity; in most golf club iron head sets, the actual amount of vertical center of gravity difference is not enough for you to worry about.

    Sonoma9600 is correct in that you will have a very hard time adjusting (grinding) the MTF heads to the same weight. The KE4’s are much easier to do this.

    I do not want to discourage you, but by buiding a set all the same length you partially defeat the purpose of having a set of irons. In essence, you are lessening the distance gap between your longest and shortest iron and placing a greater burden on your wedges and hybrids or fairway metals to make up the difference.

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  • 12:14PM - Jul 31, 2008RE: COG

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    It’s going to be difficult to accomplish that. A better head for something close to that, would be the KE4. You can make the heads heavier or lighter with the weights.

    You might want to consider smaller increments than the normal 1/2”, instead of all the same length. This will create longer short irons and wedges and shorter long irons. If you went this way, then you could use the MTF and get the weights and shafts all matched up.

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  • 5:50PM - Jul 30, 2008RE: COG

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    Ralph- Thank you so much for your help. I am really getting into this, I will get your book. I can’t wait to get into the actual building of the clubs! In the meantime, I am working with a club maker. Ralph, the thing I am having a hard time with, is that I like all my clubs the same length. I have been experimenting with this idea with an old set and I love it. I have decided on your MTF irons (4-GW). The thing I am having a hard time with is the shaft selection. I like the Rifle 5.0. Because I want all the clubs the same length, lie, and swingweight, I want the shafts to all be the same (flex, kick point, etc). The question I had with the COG is with the COG of each head being slightly different, how would I compensate with the shaft (weight, weighting, etc) to get a consistent feel in all the clubs? Thanks so much.

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  • 4:38PM - Jul 30, 2008RE: COG

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    word, you need to buy the “Maltby Playability Factor for Irons” book. Sounds like you are getting into this stuff.

    Basically, the lower the center of gravity on an iron, the greater the dynamic shaft bending occurs as the club comes into impact. This results in increasing the loft more, closing the face more and also flattening the lie angle more.

    The farther the horizontal center of gravity is from the shaft centerline stabilizes the clubhead and helps it to resist rotation. Don’t worry, the golfer will still square the face by using an unconscious adjustment to get the desired shot result.

    Any added lead tape will almost certainly change the center of gravity location therefore it is important to put the lead tape in the correct place to hopefully lower the center of gravity and not raise it

    I only publish the specifications for the 5 or 6 iron. In my MPF book I do go through a number of full set examples for illustrative purposes. I have the MTF iron drawings here in the studio. Let me know which specifications you need?

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  • 7:41PM - Jul 29, 2008COG

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    Hi Ralph- Thanks for all your help and information. It is so informative. Ralph how does the COG of an iron face affect shaft performance? And does lead tape change the COG, or just the swingweight? Also, is there a chart with all of the specs for each club, or just the 5 irons? I was looking for the specs on the MTF irons. Thank you.

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