Dlam I twirl in the manner you describe, dont know when or why I started to do it. Probably decades ago Id imagine. Sometimes people comment on how Im twirling the club at the end of a swing, its always a surprise to me as I have no idea that I am doing it.
Some TGM knowledge makes me want to point out the twirl's axis of rotation is the Longitudinal Center of Gravity, also know as the Sweetspot Plane. That entire axis is the sweetspot plane from the lowest point of contact on the handle (the #3 pp) all the way through to the face of the club. The #3pp is thereby attached to the Sweetspot Plane, making direction, aiming, tracing the #3pp an imperative for sweet contact. Imagine the longitudinal center of gravity as a plumb line bisecting a plumb bobbed club. The common notion of the sweetspot on the face is somewhat wrong as it is a point without dimension , like a balance point and a point that actually moves around as you choke down on the grip!
So maybe we are twirling the club to reveal the Sweetspot Plane? Maybe we are just goofing around with our pressure points and sense of touch. I dunno.
Actually, the twirl is centered around the longitudinal MOI center, not the COG. COG is a static concept, the balance point of an object at rest. MOI center is the dynamic "big brother". The MOI center will be the center of an uncompensated rotation. MOI equals mass * distance^2, while COG equals mass * distance, so MOI gives more credit to distance.
Homer took a short cut when he used COG for defining the sweet spot plane. He should have used MOI instead.
Actually, the twirl is centered around the longitudinal MOI center, not the COG. COG is a static concept, the balance point of an object at rest. MOI center is the dynamic "big brother". The MOI center will be the center of an uncompensated rotation. MOI equals mass * distance^2, while COG equals mass * distance, so MOI gives more credit to distance.
Homer took a short cut when he used COG for defining the sweet spot plane. He should have used MOI instead.
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Thanks Bernt
Are there any implications to the sweetspot or it's plane?
I think it makes a profound difference to club making but I am not sure whether it makes a difference that makes a difference to TGM. As far as the twirl is conserned, it means that the clubshaft side of the club will be further away from the twirl axis.
Hybrid Mode
