You've pretty much got it when using the actual components that go into the club. As mentioned in another e-mail they also have a "database" method that predicts the MOI.
They do use overall club length, as well as the distance from the sole to the middle of the additional weight. The position of the additional weight can really be ignored as its effects on the computations are very minor on the measurements I've taken..
I should have pointed out in my post that their software also gives you the swingweight of measured club. For example, in your Step 1 not only do you get an MOI you also get a swingweight.
If the software tells you you need to remove 4 grams of headweight to reach an MOI target you can compute, using your standard rules of thumb, what effect that would have on the computed swingweight and from there compute an equivalent length change to reach the newly estimated swingweight (and the MOI target as a byproduct of this). As with all rules of thumb, it isn't totally accurate, but can get you close.
/Ed
Dave Tutelman wrote: <snip>
Then Wishon's product (hardware + software) will have you MOI-match with the corresponding steps:
(1) Measure the MOI. This involves:
- Measure balance point
- Measure total weight
- Measure period
- Crank them into the software and get out MOI
(2) Add or remove head weight (with tip weights or lead tape).
The change is recommended by the software.
(3) Measure the MOI. This involves:
- Measure balance point
- Measure total weight
- Measure period
- Crank them into the software and get out MOI
If not on target, go back to step 2.
That is my understanding of what Wishon's offering is. If someone who has used it can verify or correct this, I'd appreciate it.
Cheers! DaveT
