Smash factor

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I have been reading up on this and now slightly (very!) confused. I was always under the impression that the maximum theoretical SF was 1.5 and that would require a driver with 0 degrees loft but current PGA tour stats show all the top guys average in excess of 1.5

So, have any rules been changed? Below is a link explaining how it works dated 2012. I assume that CoR, rules governing balls etc are all still the same?

https://www.tutelman.com/golf/ballflight/smashfactor.php
 
Who actually cares?

These guys hit it very near the middle and a hell of a long way! The clubs have been checked and are conforming!

The easiest way to improve distance, with the same Driver (for example), is to hit it better - and the closer to 1.5 (or more), the better!

Oh, and was there a tail wind when the measurements were made?

I also know that there are a few tweaks available to LMs (though not what they are) that can increase the SF past 1.5!
 
Last edited:
Foxholer said:
Who actually cares?

These guys hit it very near the middle and a hell of a long way! The clubs have been checked and are conforming!

The easiest way to improve distance, with the same Driver (for example), is to hit it better - and the closer to 1.5 (or more), the better!

Oh, and was there a tail wind when the measurements were made?

I also know that there are a few tweaks available to LMs (though not what they are) that can increase the SF past 1.5!
Click to expand...

drive4show, that's why he asked, I presume.
 
hope you all sitting comfortably (with some paper & pen/pencil) :)

so with the COR in place governing driver club head design using math/physics 1.50 is the maximum SF number possible

but remember to give an SF number the club head club face speed has to be measured absolutely exactly to conform with math/physics calculation

it's real difficult to measure the exact mph speed of the location of strike as the heel is always moving slower than the toe -

even though launch monitors do extremely near accurate measurements

for trackman TM3 has a tolerance of +-1.5mph
TM4's tolerance is +- 1.0mph

so looking at a club speed of 100mph (easier to do the math) for TM3 this means the SF number is working to a variation for TM3 of 1.478 to 1.523
& for TM4 the variation is 1.485 to 1.515

both still highly accurate as you are dealing with tolerances in 2nd & 3rd decimal places

but it's the uncertainty in complete exactness of the club speed measurement so that uncertainty of absolute location of strike
- as for that example of club speed of 100mph with ball speed of 150mph (so math limit of 1.50)
in actuality there is still a bunch of difference of speed from heel to toe & the differences in average terms can be between 6% to 7%
so in the example if center is traveling true at 100mph the heel is 93mph where as end of toe is 107mph

then factor in just where - so again not absolute certainty of the radar reflection origin of the data reading from the club head(face) - so leads to this variance in tolerances & why you can get a SF# reading of over 1.50


 
Thanks coach, I guess that makes sense as to why they are posting numbers above the regulated maximum.
 
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