Besides using the Skiddometer during rain, slush, and snow conditions, the Skiddometer is also used for checking the runway surface condition and ‘rubber build-ups’ (runway calibration), therefore measuring wet friction at a water depth of 1mm. This measurement is based on recommendations of the International Civil Aviation Organization (ICAO), the Federal Aviation Administration (FAA) and ASTM standard E 1960-98.
Since wet pavement always yields the lowest friction measurements, we offer a self-wetting system, which simulates wet pavement surface conditions and provides the operator with a continuous record of friction values along the length of the runway. The attached water pump and nozzle are designed to provide a uniform water depth of 1mm in front of the friction measuring tire. This wetted surface produces friction values that are most meaningful in determining whether or not corrective actions are required.
For regular runway calibration with a trailer-based Skiddometer BV11, we offer the WMS Water Measurement System. The WMS system is totally self-contained and offers maximum flexibility, as any vehicle can be used for towing. The stainless steel water tank is built from multiple compartments to prevent sloshing. Its capacity is sufficient to make the longest runway measurements with a single run.