Heating Comparison of Radial and Bias-Ply Tires on a B-727 Aircraft

摘要

Aircraft taxi tests were conducted to compare the heating correlation of radialand bias-ply tires. The tires were tested on a Boeing 727-200QC, owned and operated by the Federal Aviation Administration (FAA) for the purpose of aircraft safety research. The aircraft was taxied at two different tire loads, at three different speeds, and for a given distance unless a threshold temperature of 250 deg F was reached. There was also a 14-mile roll test of 25 mph and a 31,000 pound tire load was conducted to make a comparison between the radial and bias-ply tire heating. The differences in temperature change (AT) between the radial and the bias-ply tires that were taxied the same distance and tire load were then compared. In summary, the radial tire ran cooler in all scenarios of weight and taxi speed. Bead temperatures were from 5 to 20 percent less for the radial tire than for the bias-ply tire. Tire load had a significant affect on tire heating. A 24 percent increase in weight caused a 17 percent increase in tire temperature over a distance of 36,000 feet for the bias-ply tire and an 8.5 percent increase for the radial tire under the same conditions. Taxi speed affected the change in bead temperature but only after a certain distance was taxied.