Does the shaft flex forward at impact...in effect adding loft?

[Scifisicko]

Asking for no reason other than for help to settle an argument

[Iain]

Yes it kicks forward.

[JADO75]

Yes

[JADO75]

30583

[Iain]

30583

Not quite, that's a shutter effect of the camera.

[TheNuclearOne]

http://www.wishongolf.com/forum/viewtopic.php?f=5&t=10363&sid=91dc00dd27b7c462c85ce3197ac18a39

end thread.

[MegaWatty]

http://www.wishongolf.com/forum/viewtopic.php?f=5&t=10363&sid=91dc00dd27b7c462c85ce3197ac18a39

end thread.

No end thread.

http://img.tapatalk.com/d/14/05/18/u8udape9.jpg

[JADO75]

That's what I kept getting

[3Puttpete]

Not quite, that's a shutter effect of the camera.

http://youtu.be/dToMXNNpbrM

[goughy]

30583

Fools.... That's Tigers takeaway! ;)

[TheNuclearOne]

LMAO, sorry it must have been open in google for me as i am a Wishon member.

Tom loves the sharing of information so -


http://www.wishongolf.com/forum/styles/maxthon/imageset/icon_post_target.gif (http://www.wishongolf.com/forum/viewtopic.php?p=75178#p75178)by TWW (http://www.wishongolf.com/forum/memberlist.php?mode=viewprofile&u=3) » Sun Feb 27, 2011 3:45 am


the shaft's forward bend effect on the dynamic loft of the head and the rotation of the head for dynamic face angle at impact is a product of both the shaft's overall flex/stiffness design as well as its bend profile design too. But again, as we have taught in our newsletters and in the CSC book, the shaft only achieves a position of forward bending for golfers with a later midway to later to very late release of the wrist **** angle before impact. For golfers with an early release and early midway and even midway release, the shaft rebounds back from its forward bend position before the clubhead gets to impact.

All that being said, being able to accurately isolate the actual amount of forward bending effect on the loft and face angle of the head at impact is very difficult to separate out from the effect of the golfer's angle of attack on the loft - and also difficult to separate out the shaft's effect on face angle from the golfer's own delivery of the face angle to impact.

Such independent measurements would have to be done via high speed video (VERY high speed) along with a capability in the digital display of the video to be able to set up a way to measure the angles.

This is why in a practical sense, it is better to look at this via an accurate launch monitor so as to track the combined effect of the loft at the point of impact, the golfer's angle of attack and the shaft's forward bending all combined together versus the launch angle of the shot. We know that for each golfer's clubhead speed + angle of attack + shaft forward bending effect, there is a specific launch angle that will result in the maximum carry distance.

Typically in a fitting, it is best to determine the best length, best face angle, best loft, best total weight, best swingweight, best shaft and best grip size based on a total analysis of the golfer's fitting characteristics - then to build a test club with each of these fitting parameters and use that to chart the launch angle and accuracy flight of the ball.

With such a provisionally fit club, if the launch angle is not optimum for the golfer, but if the shaft seems to be of the right stiffness and bend profile for the golfer, it then is adviable to focus only on changing the loft of the head to get to the best launch angle for the shot.

What I am saying is that if the shaft seems right for the golfer's clubhead speed, transition/tempo/release/strength, there is no need to change the shaft to achieve a more optimum launch angle - it becomes better to focus on changing only the loft to get to that optimum launch angle.

Another way to try to see the actual effect of the shaft on the launch angle of the shot is to have the golfer hit various test clubs on which the only thing that would be changed would be the shaft. With every other fitting characteristic kept the same on the test clubs, one then can see the effect of different shaft flexes/bend profiles on the dynamic loft and launch angle so as to be able to see that effect of the shaft independently.

I can say when we have done this in testing with various golfers, we have not seen a change in the launch angle from the shaft on its own to be more than 2.5 to 3*. Of course when we have done this, we have kept the shaft within reasonable fitting parameters for the golfer - meaning we have not tested this using a range of flexes from L to X for the golfer. We have only done this within flexes that would be considered a reasonable fit for the golfer so the difference in launch angle from the shaft on its own come from differences in the bend profile of the shafts.

TOM





There is some closing of the face from the combination double bending of the shaft through droop and forward bending before impact. However, in reality this is a pretty small factor that rarely shows up in the form of increasing a draw or reducing a fade. basically how we golfers deliver the face angle of the clubhead relative to our swing path is what determines the horizontal launch angle and any change in spin axis of the shot - a.k.a. the direction of the shot plus any curvature of flight.

Torque is really a non issue in fitting shafts these days because the shaft makers all know of its potential effect and allow for it in the design of their shafts. In other words, the shaft makers know that the stiffer the overall flex of a shaft, the lower they're going to make the torque and vice versa. And really, when you look at shaft designs for ALL flexes these days, you really don;t see any L flex shafts with torque much higher than 6* just as you don;t see hardly any X flex shafts with torque lower than 3*.

So since torque exists within such a narrow range over all flexes, and since torque is kept lower for stronger players' shafts, it really is a non issue in fitting shafts. it is very rare for a golfer to have such a strong transition and downswing tempo that they over rotate the shaft - the only way that could happen is if the golfer is fit into too soft of an overall stiffness in their shafts. So if you do a good job matching the golfer's swing speed + their transition, tempo and release to the design of the shaft, torque is a non issue.

[Scifisicko]

bugger...comprehensively defeated