quote:Originally posted by brianman
If low spin is king, why not a zero degree driver and hit up on it 13 degrees??
Well Brian, I would first refer you to 2-B for starters regarding ball spin.
For each driver head speed at impact, there is an optimal ball spin rate for maxing distance. The lower the swing speed the higher the spin rate is required to keep the ball adequately airborne. That is why a 15* driver is recommended for a 70 mph swing speed. I would think that hitting up or down at this low swing speed would be immaterial to the results, so the TGM advice to hit down could be quite acceptable for slow swing speed.
However, if you hit down at higher drive head speeds then you would generate too much ball backspin resulting in non-optimal launch conditions. This is well known to those who operate launch monitors.
As for a zero driver loft, that is essentially what some LD competitors use when they get to 5 degree face loft drivers. And using a max 4 inch tee height they can get a 13*-15* initial launch trajectory, provided they hit up on the ball. At 145 mph driver head speed it would be fatal to hit down on the ball because it would balloon tremendously due to very high ball spin rates.
I think that Kelley would have embraced the new technology that is available today, and would not hesitate to revise TGM where necessary. I don't think this one issue is a "fatal flaw" for TGM, but rather it is just recognition that science advances and so must TGM. Why is it that there seems to be so much resistance to revising TGM to incorporate new technological information about the golf swing?