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Comparison of Tannar Golf Trajectory Model to Empirical Trackman Data

Trackman is a company that makes a golf ball monitor that uses Doppler Radar to track the golf ball as it flies through the air. It is used by the United States Golf Association, PGA Tour, Royal & Ancient Golf Association, golf club and golf ball manufacturing companies and many golf teaching professionals. It is known as the most accurate golf ball monitor on the market.

Trackman has been publishing some of its empirical results in its newsletters. In its January, 2010, Newsletter, it published PGA Tour and LPGA Tour average statistics for Driver trajectories (Page 6 of Jan 2010 Trackman Newletter, http://trackman.dk/getmedia/e388effb-0686-425b-9824-650d2e123c6e/January-2010.aspx .

Below in the table you'll find the Trackman data as well as the values predicted by the Tannar Golf Trajectory Model which are outputs of a MS Excel Spreadsheet.

My model assumed a temperature of 25 degrees Celcius (77 F), no wind, near sea level. The Trackman data is accompanied by the note, " Please be aware that the location and weather conditions haven't been taken into consideration. Besides these reservations the data is based on a large number of shots and give a good indication on key numbers for tour players."

Thus, the Trackman data would have been collected at various temperatures, altitudes and wind conditions. Some shots would have been with the wind, some into the wind, some in a crosswind. Note, that if air temperature is higher and altitude is higher, the ball will carry farther.

 

Clubhead

Angle of

Ball

Smash

Launch

Spin

Max

Land

Carry

Speed

Attack

Speed

Factor

Angle

Rate

Height

Angle

Distance

(mph)

(deg)

(mph)

(deg)

(rpm)

(yd)

(yd)

(yd)

PGA Tour Average

Trackman

112

-1.3

165

1.47

11.2

2685

31

39

269

Tannar Model

112

-1.3

167

1.49

10.3

2374

27

33

259

LPGA Tour Average

Trackman

94

3.0

139

1.47

14.0

2628

25

36

220

Tannar Model

94

3.0

140

1.49

14.5

2043

25

33

215

 

As can been seen from the data, the Tannar Model predicts quite closely the golf ball parameters measured by the Trackman for the two club speeds of 112 mph and 94 mph.






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