The Velocimeter (Time Gate) is a very precise
electronic device that calculates the time it takes for an object to pass in
front of an infrared beam a few millimeters before impact. The time in
milliseconds and the length of the object are then used to determine the
The drop release button releases the ball arm holder, setting the impact in
Drop carriage and the ball arm holder (see description below).
The Helmet basket is used to support the helmet. The metallic bar is used to
further secure the helmet into place and restrict any movement.