The IMAG is an automatic device for measuring the skid resistance of aeronautical pavements. It is the result of a cooperation between the Civil Aviation Technical Service / General Directorate of Civil Aviation and Aéroports De Paris.
The IMAG is covered by patent 89.16834. A measuring wheel, weighted and towed at a constant speed (up to 140 km/h), is braked according to a selected slip rate (0% to 100%).
The use of IMAG allows:
An operational evaluation of skid resistance in winter under operating conditions.
A functional evaluation of skid resistance outside the winter season (measure on water film): management of runways and taxiways (e.g., need for degumming).