Author Topic: CT Values  (Read 468 times)

nobwas

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Re: CT Values
« Reply #15 on: July 08, 2018, 11:58:35 PM »
Yup, XR16 SubZero has low spin design by 1. Low CG from use of Carbon Crown. &. 2.  Forward CG placement by adjustable weight screws.   
DR: Grandista RS-D / Diamond Speeder
FW: Modart MA01F / Diamana A'hina
UT: Modart MA01H / Crazy STP
IR:  Epon AF-505/SUS316 / Modus 125
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autronicdsm

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Re: CT Values
« Reply #16 on: August 15, 2018, 01:09:23 PM »
I found this https://ameblo.jp/motuchian-pro/theme-10105149173.html where heads are reviewed and listed with CG specs if anyone is interested. These are little bit different from MyGolfSpy chart since they use distance (left/right) from center of the face, and on that blog they use distance from the shaft (if I'm not mistaken).

Here's numbers on some of the heads I was looking at at some point.

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Can someone confirm that heads like Mizuno MP Type-1 or 435 Black are easier to draw or hit straight (for natural fade hitters)? Or am I off here?

nobwas

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Re: CT Values
« Reply #17 on: August 15, 2018, 04:12:15 PM »
I've been following that guy's testing blog as well.   Good info there.
There is actually one relevant parameter missing here which is the CG angle which can actually be derived from CG distance and CG depth  (cos (cg angle) = CG distance/CG depth )     I think this is right.. been a long time since I did Trig in high school!
   
Generally, when you have shorter CG distance ( distance from shaft axle to the CG location as seen from the face )  it is easier to turn the face back to square at impact.
Producing a draw requires you to have a closed face angle in relation to the path at which the head passes thru the impact zone.

CG angle is the angle between the face and the CG location within the head.    When the CG angle is small,   it is easier to get the face back to square. 
If the CG angle is large,  it takes more effort ( and maybe a little longer in terms of time ) for the head to return to square.

Longer CG -> contributes to harder to return to square but higher potential to create more energy at impact
Shorter CG -> contributes to easier to return to square but less potential to create energy at impact

Large CG Angle -> More effort required for the head to return to square
Small CG Angle -> Less effort required for the head to return to square

Back to your original question.   MP Type 1 has a relatively short CG distance and CG depth which will mean it has smaller CG angle as well.
What this means is that the head is easier to turn in either direction.    The head is suited for those who like to work the ball left and right. 

But man, look at the higher CG height on the Bullet... a low spin bomber just looking at the specs.

JBeam Bullet's CG height stands out as being higher than the rest,  which translates to higher spin and potentially lower launch.    (thanks Matt for pointing that out! )


« Last Edit: August 16, 2018, 12:43:55 AM by nobwas »
DR: Grandista RS-D / Diamond Speeder
FW: Modart MA01F / Diamana A'hina
UT: Modart MA01H / Crazy STP
IR:  Epon AF-505/SUS316 / Modus 125
WG: MG S-01 / Modus Wedge 125
PT:  Benock EASPADE Type M

MBBG

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Re: CT Values
« Reply #18 on: August 15, 2018, 09:17:32 PM »
I thought low CG equaled lower spin?
Taylormade Ď16 M2 Tour Issue Rogue 125 60TS
Ping G400 3 Wood UST Chrome
RomaRo Type R 18* Nunchuk .370
Srixon U45 Aero i95
Epon 705 Aero i110
Forged Vokey 52F/56K Modus 125 Wedge
Callaway PM 60*
Odyssey SaberTooth (cheater putter)

wmclarenf1

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Re: CT Values
« Reply #19 on: August 15, 2018, 09:18:36 PM »
Good stuff autro... Thanks for this info.

Seems like 435 black is just a marketing gimmick by Jbeam over the 435?

Nob, I think you've had both.  Is the black lower spinning in actual play?
Drivers : AbroadDF570-Crazy435-GTD455-GrandistaRS-D-Itobori-ModartDS-ProceedIX
UTs : Itobori-ModartMA01H-ProceedTi-PXG317
Irons : GrindStudioProto-RoddioMeisterM-ModartCBC-PXG311T
Wedges : GrindStudio-Modart-Orion
Putters : Benock-BPutters-Machine-Masda-Nead-Slighter-TPMills-Xenon
Ball : Chrome

wmclarenf1

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Re: CT Values
« Reply #20 on: August 15, 2018, 09:20:08 PM »
I thought low CG equaled lower spin?

Opposite generally speaking with with multiple cg weighting design and tech these days, it seems possible me to have both ie high launch low spin.
Drivers : AbroadDF570-Crazy435-GTD455-GrandistaRS-D-Itobori-ModartDS-ProceedIX
UTs : Itobori-ModartMA01H-ProceedTi-PXG317
Irons : GrindStudioProto-RoddioMeisterM-ModartCBC-PXG311T
Wedges : GrindStudio-Modart-Orion
Putters : Benock-BPutters-Machine-Masda-Nead-Slighter-TPMills-Xenon
Ball : Chrome

nobwas

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Re: CT Values
« Reply #21 on: August 16, 2018, 12:40:50 AM »
I thought low CG equaled lower spin?

You are correct.     
I was thinking the opposite somehow, the Bullet would be higher spinning as you say.


DR: Grandista RS-D / Diamond Speeder
FW: Modart MA01F / Diamana A'hina
UT: Modart MA01H / Crazy STP
IR:  Epon AF-505/SUS316 / Modus 125
WG: MG S-01 / Modus Wedge 125
PT:  Benock EASPADE Type M

MBBG

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Re: CT Values
« Reply #22 on: August 16, 2018, 12:44:24 AM »
Thatís what I was thinking but thought maybe I had interpreted it incorrectly. With a face that deep Iím sure itís hard to make the CG really low like they can with the shallower faced more forgiving type of drivers. Of course deeper faced clubs tend to be lower spinning and launching which probably offsets the higher CG. Iíd imagine the face roughness and even the bulge and roll specs play a role in overall spin of a given head.
Taylormade Ď16 M2 Tour Issue Rogue 125 60TS
Ping G400 3 Wood UST Chrome
RomaRo Type R 18* Nunchuk .370
Srixon U45 Aero i95
Epon 705 Aero i110
Forged Vokey 52F/56K Modus 125 Wedge
Callaway PM 60*
Odyssey SaberTooth (cheater putter)

nobwas

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Re: CT Values
« Reply #23 on: August 16, 2018, 12:49:36 AM »
Good stuff autro... Thanks for this info.

Seems like 435 black is just a marketing gimmick by Jbeam over the 435?

Nob, I think you've had both.  Is the black lower spinning in actual play?

I'm sure there's some effect with that milled face but I did not notice much of a difference in flight.
But honestly I had more problems with the closed face my head had I could not keep hitting straight.
 
DR: Grandista RS-D / Diamond Speeder
FW: Modart MA01F / Diamana A'hina
UT: Modart MA01H / Crazy STP
IR:  Epon AF-505/SUS316 / Modus 125
WG: MG S-01 / Modus Wedge 125
PT:  Benock EASPADE Type M

MBBG

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Re: CT Values
« Reply #24 on: August 16, 2018, 01:26:17 AM »
Thatís what always turned me off to the 435 the most was the appearance of a closed face even with a supposed open face measurement. Totally a mental thing for me, I just canít look down at a driver that looks closed and rotating it open feels weird.
Taylormade Ď16 M2 Tour Issue Rogue 125 60TS
Ping G400 3 Wood UST Chrome
RomaRo Type R 18* Nunchuk .370
Srixon U45 Aero i95
Epon 705 Aero i110
Forged Vokey 52F/56K Modus 125 Wedge
Callaway PM 60*
Odyssey SaberTooth (cheater putter)

Shacco

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Re: CT Values
« Reply #25 on: August 16, 2018, 09:12:54 PM »
From what I understand the CG location in absolute figures doesnít tell much about the spin characteristic of a head. Only when compared relative to its neutral axis (which is the line perpendicular to the face at the center of the face). The lower the CG relative to that neutral axis is the lower spinning the head will be. That is also why forward CG heads a generally lower spinning because the neutral axis is always tilted down. So the further back the CG is, the nearer it is to the neutral axis or above it. I think this is also explained in the mygolfspy tests.
Going back to JBeam Bullet the higher absolute CG number will most likely still be very low relative relative to its neutral axis due to the deep face.
« Last Edit: August 17, 2018, 01:25:02 AM by Shacco »
Driver: Callaway Epic Subzero
3FW: Kamui TP-XF
3 and 4 ute: Romaro I-brid Chapter2
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GW: 50* CGS Orion Spy Type S
SW: 2007 Yamaha InpresX Black
LW: 60į Edel DGR
Putter: Odyssey Milled Collection 6M