This device is for checking anti-skid performance of roads ad airport pavement, can be used both in the lab ad in-situ.
The apparatus consists of a spring loaded rubber slider mounted on a pendulum arm. The arm can be adjusted vertically from a rigid support column.
The basement has three adjustable feet which is stable while operaing directly on a road surface.
Distance between rocking centre and center of gravity
Positive static pressure on pavement
plywood case or alum. case