Static loft and relationship with dynamic loft

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James Marshall
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Static loft and relationship with dynamic loft

Post by James Marshall » Wed Mar 30, 2011 9:36 pm

Is it essentially the static loft of the club that fills the gap between the angle of attack and the dynamic loft for a given clubhead speed?

For example:

If I have a clubhead speed of 95mph and an A of A of -2 and a dynamic loft of 8.5 which produces a carry distance of 175.9 yds, is it reasonable to assume that my driver has a loft of 10.5º?

dtutelman
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Re: Static loft and relationship with dynamic loft

Post by dtutelman » Wed Mar 30, 2011 9:54 pm

James Marshall wrote:Is it essentially the static loft of the club that fills the gap between the angle of attack and the dynamic loft for a given clubhead speed?

For example: If I have a clubhead speed of 95mph and an A of A of -2 and a dynamic loft of 8.5 which produces a carry distance of 175.9 yds, is it reasonable to assume that my driver has a loft of 10.5º?
No, it is not reasonable. Moreover, it is not especially likely. There are two things that would make it not so:
  • You seem to be relating dynamic loft to the horizontal. Dynamic loft is relative to the clubhead path. So changing the AoA by itself does nothing to the dynamic loft. This is explained, with a diagram, in the Help files.
    A source of your confusion may be the difference in terminology between TrajectoWare and Trackman. Both products adopted their terminology several years ago, and later noticed that dynamic loft means different things to the two products. TrajectoWare's dynamic loft is Trackman's spin loft.
  • Even if your assumption about the definition were correct, there are other things that affect dynamic loft. Among them are: shaft bend, height of impact on clubface combined with face curvature, and wrist cupping.
Hope this helps,
DaveT

James Marshall
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Post by James Marshall » Thu Mar 31, 2011 9:35 pm

Dave,

Thanks very much for your reply. The topic is more complex than I thought. Could you point me in the direction of the "Help" files, please?

dtutelman
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Post by dtutelman » Fri Apr 01, 2011 12:20 am

Sure!
Open the program and click on the question-mark icon at the right side of the toolbar. That will put you in Help. Look up "dynamic loft" in the index.

DaveT

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