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Thread: Spin Loft - Backspin - Attack Angle

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    Default Spin Loft - Backspin - Attack Angle

    Is spin loft the same thing as backspin or is this a term created by Trackman for a new form of measurement of the golfball at impact?

    How does one increase their attack angle without increasing backspin? Swing more around to lessen their VSP??

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    Spin loft is the difference between AoA and dynamic loft. If you have a level strike and deliver 20 degrees of loft your spin loft is 20. If you hit up on the ball 5 degrees and deliver 20 degrees of dynamic loft your spin loft is 15 degrees. You can up up, level or down and not increase or decrease spin if this "spin loft" number stays the same. The only thing that would change with a center hit would be vertical launch angle.
    Kevin Shields

    www.shieldsembroiderybydesign.com

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    How is the spin loft number useful? It doesn't appear to be backspin and I know its the difference between the AoA and DL, however, I don't know why its useful. Is it useful for just the driver or every club? I'm trying to understand the why behind this metric.

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    Useful TM Conference fact #56:

    "Spin Loft is compression." Tuxen
    lia41985 and lia41985 like this.
    "Enlisted men are stupid, but extremely cunning and sly and bear considerable watching." ~ US Army Officer's Guide, 1894

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    So how can one use this measurement to determine shot dispersion (like we do with face angle and path) if at all?

    Is there a normal range like we have with face angle vs. path?

    Where are the other 55???? (somewhat kidding)

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    In loose, layman's terms, think of: Backspin = SpinLoft X Clubhead Speed

    You need an angle between the face and path (Spin Loft) and some force (speed) to create spin. No angle, no spin. No speed, no spin.

    Nut a 5-iron, get a certain spin (rpm's). Nut it again, same everything except speed increases 10%. Spin would go up ROUGHLY 10%.

    For illustration purposes only.....

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    Thanks. Now I kind of understand that spin loft is a part of other important calculations (in general terms). I can relate to backspin, not the spin loft with my limited Trackman knowledge.

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    Spin Loft is the loft responsible for SPIN!! (as implied from the name).
    It is an intrinsic parameter for a club. It is the combination of the static loft on the clubhead and the loft imparted by the shaft on the clubhead at impact. In general, spin loft will be more than static loft.

    (Ideally, this should be defined as dynamic loft, as this is the loft of the club head in motion and leave AA alone as defined by Dave Tutleman years before Trackman. But, Trackman has their own definition of dynamic loft and it is a bit confusing.)

    The better way to remember is (using Trackman nomemclature)
    Dynamic loft = Spin loft + AA (all assuming contact point is at the CG)

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    Quote Originally Posted by RVArya View Post
    Spin Loft is the loft responsible for SPIN!! (as implied from the name).
    It is an intrinsic parameter for a club. It is the combination of the static loft on the clubhead and the loft imparted by the shaft on the clubhead at impact. In general, spin loft will be more than static loft.

    (Ideally, this should be defined as dynamic loft, as this is the loft of the club head in motion and leave AA alone as defined by Dave Tutleman years before Trackman. But, Trackman has their own definition of dynamic loft and it is a bit confusing.)

    The better way to remember is (using Trackman nomemclature)
    Dynamic loft = Spin loft + AA (all assuming contact point is at the CG)
    If Spin Loft is an instrinsic parameter for a club, what don't they stamp the number on the botton of the driver like they do for Static Loft?

    Does Tutleman have a term for where the face is pointing at impact?

    You mentioned Tutleman's definition of AoA. What is it?
    Last edited by savydan; 03-24-2011 at 11:53 AM.

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    Quote Originally Posted by savydan View Post
    If Spin Loft is an instrinsic parameter for a club, what don't they stamp the number on the botton of the driver like they do for Static Loft?
    Spin loft as I said before has a contribution from the shaft at impact. The amount a shaft bends at or just before impact will depend on the golfer swing speed and their release.

    Quote Originally Posted by savydan View Post
    Does Tutleman have a term for where the face is pointing at impact?
    The same term that trackman uses

    Quote Originally Posted by savydan View Post
    You mentioned Tutleman's definition of AoA. What is it?
    I said about tutlemans's definition of dynamic loft and not about AoA. Sorry for not writing it clearly

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