Measurements were made of 'impact factors' for a 35 x 10 x 17 in aircraft wheel rolling over a selection of airfield landing lights; the 'impact factor' being the maximum dynamic load due to the impact with the landing light divided by the normal load just prior to impact. Wooden models were used to simulate the shapes of the landing lights and the change in load was measured at different speeds on the strain gauged axle of the test wheel of the heavy load vehicle. The 'impact factor' was found to vary with the mean obstruction height of the model and the tire spring rate, as predicted by theoretical studies; both an increase in height and inflation pressure increasing the 'impact factor'. At the highest test speed of 100 60 mile/h the three largest models (representing three different heights) gave 'impact factors' which were in agreement with the theoretical values; in these three cases the tire width was smaller than the bump diameter. For a given bump height the smallest 'impact factor' was obtained with the smallest bump diameter where the tire overlapped the bump. The extra load due to the impact could be reduced by about 75% by using these small diameters. (Author)
Tyre Impact Tests on Airport Landing Lights
1968
17 pages
Report
No indication
English
Tyre impact tests on airport landing lights
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