EXPERIMENTAL INVESTIGATION OF SPIN-UP FRICTIONnCOEFFICIENTS ON CONCRETE AND NONSKIDnCARRIER-DECK SURFACES

摘要

A series of landing-impact tests was conducted with a carrier-type jet airplane main landing gear (dropping weight 6,630 pounds) to obtain data on tire spin-up friction coefficients at touchdown on both concrete and nonskid carrier-deck surfaces. Tire inflation pressures of 260, 320, and 400 pounds per square inch were used. The concrete-surface tests covered a forward velocity range from 76 to 97 knots and sinking speeds of 12 and l6 feet per second for a strut inclination of 2.5° forward. The nonskid carrier-deck tests ranged between 54 and 104knots in forward speed and from 12 to 19 feet per second in sinking speed for strut inclinations of 2.5° forward and 5.1° rearward. Several impact and taxiing tests on a 1,3/8 inch-diameter arresting cable-were also conducted.