Dave Pelz's Putting Bible: The Complete Guide to Mastering the Green by Dave Pelz & James A. Frank

Author:Dave Pelz & James A. Frank [Pelz, Dave & Frank, James A.]
Language: eng
Format: epub
Tags: Sports & Recreation, Golf
ISBN: 9780385500241
Google: J42pSEP4el4C
Amazon: 0385500246
Publisher: Doubleday
Published: 2000-04-14T22:00:00+00:00

The J.D. Test

If you feel the wind blowing in a constant direction at a nearly constant speed, here’s an unscientific test that may give you a slight advantage over your friends. Don’t take this too seriously (I don’t have enough data yet), but it seems to have some validity, and it’s fun. It’s a simple way to estimate wind strength, and we call it the “J.D.” test after my youngest son, because he thought of it.

In Figure 9.6.1, Eddie, my oldest son (J.D. was not available for a photograph), is releasing grass clippings from about three feet off the ground (the length of a standard putter), and watching not only the direction they blow, but also the distance. For every putter length the grass clippings land away from the bottom of the putter, J.D. calculated the wind speed will he about 10 mph. So if the grass lands nine feet away, the wind at knee height is blowing 25 to 30 mph.

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