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 US 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.
The Water Onboard system has the pump mounted on the towed Skiddometer BV11, and water tank in the tow vehicle. The water tank is a 1,000l flexible plastic water sack placed in the vehicle.