New and Improved Shaft Chart
Posted 11 April 2013 - 12:31 AM
Great addition with the PXi specs.
Posted 18 April 2013 - 07:10 AM
Posted 30 April 2013 - 11:07 AM
- ALL Numbers from KBS is measured with SW value D2, while the FCM system is based on D3
Thats why all KBS numbers is adjusted by 1 CPM to be directly comparable to the others.
Posted 08 May 2013 - 08:40 AM
Posted 11 May 2013 - 11:34 AM
Macgregor MT Tourney 13.5*
Srixon ZR-UTI 18*
Srixon Z-TX 3-PW
Zodia 52*, Hogan Forged 57*
Odyssey White Hot XG 6
Posted 20 May 2013 - 09:54 PM
RIFLE or FCM flex has some BASE numbers, but CPM value change when we go longer or shorter
BASE is 43.00" with a Swing weight of D3
FCM 5.0 = 250 CPM
FCM 5.5 = 255 CPM....
FCM 6.0 = 260 CPM
If this club was 40 long, then the CPM value would raise with 4.3 CPM for each 0.5 or 8.6 for each inch
so at 40 : ( 3 x 8.6 = PLUS 25.8 )
FCM 5.0 = 250 + 25.8 = 275.8
FCM 5.5 = 255 + 25.8 = 280.8
FCM 6.0 = 260 + 25.8 = 285.8
IF SW value is other than D3, then CPM follow 1:1
Lower SW gives higher CPM so at D2 - ADD 1 CPM
Higher SW gives lower CPM so at D4 - Substract 1 CPM
Its all math, but this numbers is measured with a 2.5 inch clamp. If a 5.0 inch clamp is used, we can add 17 CPM (average)
EDIT : To early in the morning, gave you the wrong base length :-)
Posted 21 May 2013 - 11:40 AM
Posted 21 May 2013 - 01:51 PM
There is very different opinions if soft stepping PX is a good idea or not, but what ever works.....Get 1 shaft and try it first.
Going Constant weight might be a good thing in the short irons, compared to Flighted.
Posted 24 May 2013 - 11:23 PM
First of all, this is ONLY butt Cpm strength and it not useful to compare 2 shafts as a hole. Then we need the hole profile like Tom Wishons shaft profiling software. Im using the #6 iron shaft, since its the #6 iron im using for fitting of irons.
PX Flighted is on average 4 CPM softer than regular, so PX 5.5 Flighted equals to "PX 5.1" as standard.
In FCM numbers the shafts you mention looks like this
KBS Tour R+ = 5.5
PX 5.5 Flighted = 5.6
S300 = 5.8
PX 5.5 = 6.0
KBS Tour S = 6.0
Flighted is a mix of flexes but they dont vary in flex "as a set". They way they are trimmed makes them equal as a set, so the long irons who actually is a stronger shaft, becomes softer the way its trimmed, and the short irons who is actually a softer shaft is made stronger the way its trimmed. Thats why Flighted is descending weight even with taper tip shafts, while butt Cpm strength got normal progression with a average of 4 CPM from iron to iron like ordinary PX or DG.
I have a set of Callaway Prototype 3-PW on my table with PX 6.5 Flighted today, and i can give you all numbers later so you can see what slope they follow
Posted 26 May 2013 - 07:53 AM
Some OEM uses a lower BBGM on their short irons, who makes them to play stronger, and PXF is a hard stepped 1 flex softer, so they are also lighter weight than your mid and long irons. I have no idea of why they are 0.5 shorter than they should...
8,9,PW is the "Hard stepped" short iron, so if you feel for changing them, go PX 6.0 standard flight 8,9,PW, and you stay in flex and keep shaft weight and flight pattern equal to your mid irons.
(If hosel specs in the short heads is equal to the others, so measure both BBGM and hosel depth)
Thats my suggestion, Go 6.0 standards strait in. Your Long irons will still be like 6.5 SS1, so they have more weight than the others.
Edited by Howard Jones, 26 May 2013 - 07:57 AM.