Something really cool in regards to MOI

[LyleG]

The new Tom Wishon Tech notes are out and they have some great findings on MOI. MOI increases 37g-cm2 per gram of weight added to a club head. The cool part is that it doesnt really matter where the weight is added to have the same effect. Its takes just over 12g of weight to move the center of gravity in a driver head 1/8 of an inch, so as long as the weight is pretty evenly distributed it wont affect the clubs COG at all.

Here is the cool part.


Take a new callaway FT-1 driver, they have a MOI of roughly 5600. USGA max is 5900, but the USGA only measures raw heads. Now the Cally comes with a stock shaft weighing 65 grams and is 46 inches in length. So you pull that shaft and drop in a LIMEY weighing 55 grams, and trim it to 44 inches, being sure to tip trim it to allow for the added head weight. I would have to look up what corresponding wood would be the same weight as the Cally head when we are done with it. This will lower the swing weight roughly 13 full points. To get this back you need to add 26 grams of weight to the head. Using hotmelt or rat glue and a combo of lead tape you easily do this.
This will increase the MOI by 962g-cm2, meaning the new club will have a MOI of 6562.

An all day straight fairway finding machine, that get around the USGA MOI limit.

[warbirdlover]

Well, we know what you're going to be making yourself next!!

[Slingblade61]

Hot melt?

Lyle, have you seen my perimeter weighting system I put out 2 years ago?

Very cool looking and not as messy.

[Rockford35]

LOL.....no matter how many times I see it, it's still gold, Sling...



R35

[MCDavis]

Yeah, I saw that...don't you have a gold plated version for extra bling?

[LyleG]

Originally Posted by Slingblade61

Hot melt?

Lyle, have you seen my perimeter weighting system I put out 2 years ago?

Very cool looking and not as messy.

Dare I ask what it is?

[Jules150]

lyle, could you do that to any club?

[LyleG]

Originally Posted by Jules150

lyle, could you do that to any club?

Any club head would work

[Rockford35]

Lyle,

This is another option...LOL.

The new S61 perimeter weighting system

R35

[LyleG]

Well I have an experiment curing in the shop.

The stupid Launcher Ti is now a high MOI thriver.

Its a 10.5* launcher with a 216 gram head and 43.5 inch Accuflex Icon shaft tipped 1/2 an inch.

Real curious to see how this turn out.

My guess is short and a mile f'in high.

[Jules150]

Originally Posted by LyleG

Well I have an experiment curing in the shop.

The stupid Launcher Ti is now a high MOI thriver.

Its a 10.5* launcher with a 216 gram head and 43.5 inch Accuflex Icon shaft tipped 1/2 an inch.

Real curious to see how this turn out.

My guess is short and a mile f'in high.

does that mean the MOI will be too high?

[LyleG]

Originally Posted by Jules150

does that mean the MOI will be too high?

No, not at all. It mean I simply cant hit this closed faced high lofted Cleveland launcher worth a shit.
In order to hit it straight I need to open it up which increase the loft. Add in my 106 mph driver speed with this club and the fact it is a very low COG head, and you get a launch angle of about 17 degrees with about 5500 rpms of backspin. Its a real nice 7 iron however LOL.