INFLUENCE OF SURFACE CONDITION OF TAXIWAYS AND RUNWAYS ON TIME OF AIRCRAFT DEPARTURE

The state of the runway (RWY) under operating conditions, due to the possibility of formation of a layer of water, ice, slush, snow, decreases the friction coefficient of the aircraft landing gear to RWY, and may cause the aviation events. In addition, the condition of taxiways and airport runway affects the taxiing time of aircraft, which during high-traffic hours can lead to additional flight delays. To study the effect of friction coefficient on the runway occupancy time the methodology of collecting statistical data about the time of different types of aircraft spent on runway at various values of the friction coefficient is offered. The method is based on a full-scale experiment. To conduct the experiment as the object of analysis the process of moving the aircraft from the holding position up to reaching the height of 200 meters at Vnukovo airport was chosen. Since the observer cannot control the parameters affecting the object of study during the flight, the friction coefficient is recorded as an input parameter during the experiment and as the response – the time of moving aircraft from holding position up to reaching the height 200 meters after take-off on standard departure procedure. As a result of the experiment, according to the obtained data, a graph of Ttot versus friction coefficient was designed. The greatest influence of the friction coefficient is observed when taxiing from the holding position on runway to line-up position