Shown on the right is the justly famous Beck Ball Pendulum which has been continually refined through more than twenty-five years of production and use. This ballistic pendulum is built of aluminum castings and stainless steel machined parts for continuous, uninterupted service.

Part of a production run of the pendulums is shown below.

Mass of ball and pendulum 201.1 g

Radius of gyration of ball 30.7 cm

Period of ball-pendulum 1.08 sec

Initial velocity of ball 627. cm/s