Runway and Roads Grip/Friction Testing.
Grip Tester is a trailer-based Continuous Friction Measuring Equipment (CFME). It works on a principle of measuring the skid resistance of a surface, generally a road or runway, by running a measuring wheel that slips or skids compared to two drive tyres.
The measuring wheel is mounted on an instrumented axle from which Grip Numbers, which are representative of the skid resistance, are computed. Skid resistance is always measured in the wet and so the Grip Tester incorporates a controlled water flow system to produce a film of water in front of the measuring tyre.
For Roads and airports, testing is done all year round.