Measurements were carried out for the rolling resistance of an aircraft wheel caused by dry snow. The wheel was equipped with a tire of the dimension 12.50-16, which is used on aircrafts of types CV-440 and N-262. The measurements were carried out at a static wheel load of 38.800 N (3.960 kp) and a tire air pressure of 410 kPa (60 psi) and 550 kPa (80 psi), respectively. Speed during the measurements was 50 km/h. The rolling resistance seems to increase approximately proportionally to the increase of the snow depth at a constant tire air pressure. Increased tire air pressure causes a decrease of the rolling resistance. This effect indicates that tires with high air pressure should be used on aircraft wheels when taking off from snow-covered areas, even if the load on the wheels does not require a high tire air pressure. Measurements were also carried out for the rolling resistance of a tire of the dimension 7.50-14 caused by dry snow at different speeds. This tire is especially intended for friction measurements (ASTM tire). These measurements were performed at a static wheel load of 4.800 N (490 kp) and at speeds of 50, 65, and 80 km/h. The rolling resistance seems to increase proportionally to the increase of the speed within the interval of speed used. The influence of the speed on the rolling resistance seems to be greater in deep snow than in thin snow.


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    Title :

    Rolling Resistance of Aircraft Wheels in Dry Snow


    Contributors:
    B. Kihlgren (author)

    Publication date :

    1977


    Size :

    36 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English