Standard Test Method for Measuring the Dynamic Stiffness (DS) and Cylindrical Coefficient of Restitution (CCOR) of Baseballs and Softballs

Importancia y uso:

5.1 1 The ball dynamic stiffness is a measure of a ball’s hardness. Its measurement is conducted to represent bat-ball impact forces. It is normalized by the ball weight and speed to minimize the influence of manufacturing and test variations from the measure.

5.2 The cylindrical coefficient of restitution is a ball property of relative velocity change caused by impact with a cylindrical surface.

5.3 This test method compares the performance of baseballs and softballs after impact with a cylindrical test surface.

5.4 Sports associations can use DS and CCOR measurements in specifications for official baseballs and softballs.

Subcomité:

F08.26

Referida por:

F2219-23

Volúmen:

15.07

Número ICS:

97.220.40 (Outdoor and water sports equipment)

Palabras clave:

ball elasticity; ball hardness; baseball; cylindrical coefficient of restitution; dynamic stiffness; softball;