Stimpmeter
The stimpmeter is a measuring device in golf . With its help, the roll length of a golf ball on the greens can be determined.
The Stimpmeter was invented in 1935 by the US banker and golfer Edward Stimpson. It was not used until 1975 by the United States Golf Association . A stimpmeter consists of a V-shaped aluminum rail 36 inches (91.44 cm) long and 1.75 inches (4.45 cm) wide. At 30 inches (76.2 cm) there is a notch to place the golf ball. The opening angle of the V is 145 °.
To measure, the stimpmeter is placed on one end of the green. The other end is raised. A notch in the rail ensures that a ball only starts moving from a lifting angle of around 20 ° and thus rolls onto the green at a defined speed. Depending on the nature of the green, there are different roll lengths. The length measurement is carried out six times and an average value is calculated from this.
For slow greens there are values of around 200 cm, for very fast greens of up to 350 cm.