Doherty states in his MOI Balance Index Spreadsheet that he was able to exchange his club direction with the Balanced golf equipment. Is this without a doubt viable?
I do not accept as true with that this is truly viable.
For example, if a golfer has a direction that is -4? Left of the goal I do now not see it unexpectedly converting to 2? Proper of the target.
At least I do no longer accept as true with that Balancing a fixed of clubs is directly associated with the route. I assume that MOI matching enables the path emerge as a touch tighter in dispersion, for this reason the smaller effect dispersion when golf equipment are nicely MOI matched. For example, I experience a golfer whose route tiers from -3 to -9? Left with a swingweight matched set of clubs may fit to -3 to -6? Left with MOI matched golf equipment.
Mind you, I have no real evidence of that. However, I even have properly evidence that effect dispersion significantly improves with golf equipment which can be properly MOI matched. Thus, I am theorizing *why* this is.
Doherty states in his spreadsheet that he turned into seeing distance profits together with his clubs Balanced. Is this possible?
Yes, I accept as true with so. With a three-iron that is not Balanced, the club already has a low loft. So if we hit it low it will no longer go as a long way. And if the membership?S mass is more concentrated inside the shaft, it?S simply going to launch lower.
Conversely, with a PW the membership has greater than sufficient loft to provide a excessive launch and spin ball flight. With the club?S attention of mass greater inside the club head, the ball will just be launched higher and spin greater. With the golf equipment nicely balanced the release and spin conditions end up extra ideal for every membership.
How a lot does this truely help?
Here?S a Trackman document of Tour averages. Pay close interest to the Max Height column:
The max top for clubs should more or less be the identical. But even the Tour players have some problem accomplishing that.
The lowest flying membership?
3-iron.
We see the nine-iron and PW fly lower than the 7-iron. However, the point is that Tour golfers ought to regulate their swing mechanics to hit those brief irons decrease and the long irons higher. From my enjoy, I experience it's miles simpler to supply decrease ball flights than higher. I can without problems knock a shot down lower than regular than to try to hit one noticeably better than normal.
With Balancing the set, the golf equipment are designed so the golfer doesn?T must make wide sweeping adjustments in swing mechanics to hit their long irons excessive enough and get that penetrating ball flight with their brief irons.
How might counterweighting work with Balance matching golf equipment?
We need to bear in mind that with golf equipment right here are the policies of thumb as some distance as weight brought at sure locations and how it changes the membership's MOI:
1-gram to membership head = 10-12 MOI factors
1-gram to stability factor = 5 MOI points
1-gram near shaft label (beneath grip) = 2-3 MOI factors
1-gram on butt-cease of shaft = zero MOI factors
Let's say we have this scenario here where our 9-iron is assembled and we are trying to reach a target of 2,725 kg/cm^2 and a Balance Percentage of 60%.
If we upload three.5 grams of lead tape to the pinnacle, so that it will get us to 2,725 kg/cm^2:
However, that lowers the balance to fifty five.18%.
What we recognize is that if we have been to maintain the pinnacle weight at 284.5 grams, that 60% of that could be 170.7 grams.
And in view that our grip weighs forty nine grams, meaning the shaft desires to weigh 121.7 grams.
In this scenario, if I had been to add a 12-gram counterweight, the additives might now appear to be this:
Now, that isn't at 60%, however we've a /- 2 % margin of error to paintings with.
Earlier you mentioned that you found that counterweights can often be used in the driver, 3-wood, short irons and wedges. Why is that?
Aerotech, Nippon and now UST with the Recoil line of shafts appear to be seeing the flaws with swingweight and swingweight matching and are now favoring MOI matching. But, every other shaft company is deeply entrenched into swingweight matching. And the OEM's that make the drivers, irons, wedges, etc are the same way. So the way many clubs are designed with swingweight matching in mind makes them a bit more in need of adding shaft weight in order to balance the club.
I will start with the driving force.
Generally, the driver is not a giant issue if the club is designed to spec. But, the typical shaft lengths of a driver are 45.5" to 46" long. The shaft's weight and Bend Profile may fit the golfer just fine. But, it's length may present an issue. The golfer may have way too long of a driver shaft and now their alignments at address are thrown off. They'll either end up having too little waist bend at address or they will stand further away from the ball to get that waist bend. Both of which can set off a lot of compensations to be made in the swing.
So if the golfer wants to fit their driver closer to their height and arm length, they will likely need something in the 44" - 44.75" long range. In fact, Bubba Watson and Adam Scott, two fairly tall golfers, use a 44.5 and 44.75 inch drivers respectively.
The problem is that just trimming the shaft from the butt end will present some MOI issues. The MOI will become much lower. Again, that shaft's weight may have fitted you nicely at 45.5" long, but at 44" long the weight and the heft changes. And if you like the shaft's Bend Profile you will either need to find a shaft with a similar bend profile that is heavier in weight or use a counterweight.
Three-WOODS
I believe that OEM's have struggled to make 3-woods with the correct amount of heft. Your typical driver head weighs about 200-205 grams. Your typical 3-wood head weighs about 207-212 grams.
But, the typical driver is 45.5" long while the typical 3-wood is 43" long. That's a giant difference in shaft length while only having about a 7-gram difference in head weight.
The normal head weight discrepancy in *irons* is 7-grams. But, irons are only in 1/2" or 3/8" shaft increments. Here we have a 7-gram increment from teh driver to the 3-wood, but a 2.5" shaft length difference.
The typical adjustment made is that the golfer will use a similar shaft to their driver, but about 10-grams heavier. I just do not believe that the difference in weight makes up for the 2.5" shaft length difference (or even a 1.5" shaft length difference).
SHORT IRONS & WEDGES
The issue with short irons and wedges is that virtually no matter how heavy of a shaft you use, the shaft will not be heavy enough once it is trimmed. I purchases a 138 gram wedge shaft, the heaviest I could find, and after trimming it only weighed 110 grams. And I needed a 122 gram shaft weight. The same with the shorter irons, except you can get away with using less weight in the counterweight.
In the end, I think this is something consider if a golfer is seeking the ultimate in club fitting and trying to figure out why some clubs either do not feel or perform quite like other clubs in their bag. And I really think that it can provide a giant benefit to golfers looking to hit their driver better if they are willing to patiently try out different scenarios.
3JACK
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