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Thread: Manzella Isms

  1. #1
    Junior Member
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    Default Manzella Isms

    Hi,

    I am trying to better understand your material about 3d jacobs and your method.
    I have a few questions for U.

    1. What is the difference between torque and rotation? For example, alpha beta and gamma are torque or rotations?
    2. What are the optimal values (or ranges) of alpha beta and gamma torques (or rotations)?
    3. Let's speak about gamma torque. You said that it should be applied at the mid-downswing. My idea was that the least rotation of the wrist (in terms of gamma) the better, because the face of the club is more likely to be square at the impact. What is wrong in my interpretation?

    Thank you for your help.

    Regards,
    Davide Bertoli

  2. #2
    dbl
    dbl is offline
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    Default

    Here's a typical set of discussions for this.

    There's also some interesting details like in some instances you apply a torque early and get the rotation a bit later into impact. I love that kind of stuff, since the 'system' of golfer and club do 'respond' as the physics allows/mandates

    The Science of Smash (Alpha, Beta & Gamma Torques) April '15 Golf Digest Feature

    The XYZ axes, and what contributes the most to clubhead speed (now w/p5 VIDEO)


  3. #3
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    Thank you so much dbl!

    2 questions:

    1) I didn't understand yet the different between torque and rotation;

    2) just to be sure: did the 3 kinds of torque change from 2003 to 2015? Referring to average and position.
    The shaft point initially inside the ball on the downswing, applying some negative beta torque (the carry). When the leading arm is parallel to the ground, start to shift in positive beta torque (the tumble), applying positive gamma torque (twistaway) and Alpha torque?!

    Thank you

  4. #4

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    What was in 2003?
    "All you have is the HUB PATH and the force and torque you apply to the club—that's the whole swing."

    Brian Manzella is Golf Digest's 37th ranked teacher in the USA and is a three time Golf Magazine Top 100 Instructor.

  5. #5
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    Good afternoon Brian... I mean the great video you did on july 2003 about the explanation of Alpha, Beta and Gamma..The science of Smash.
    Thank you.
    D

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