AIRCRAFT GROUND-FLOTATION INVESTIGATION. PART 7. DATA REPORT ON TEST SECTION 6
Final technical rept. 1964-1965
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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This data report describes work undertaken as part of an overall program to develop ground-flotation criteria for the C-5A aircraft. A test section was constructed to a width adequate for two test lanes. Each lane was divided into three items having different subgrade CBR values and different traffic surfaces. Item 1 was surfaced with modified T11 aluminum landing mat, item 2 was surfaced with M8 steel landing mat, and item 3 was unsurfaced. Traffic was applied to one lane using a 35,000-lb load on a single-wheel assembly consisting of one 25.00-28, 30-ply aircraft tire inflated to 50 psi. When this combination of load and wheel assembly did not produce failure in the traffic lane, the same assembly with a 60,000-lb load and 100-psi tire inflation pressure was applied. On the other test lane, traffic was applied with a 120, 000-lb load on a twin-wheel assembly consisting of two 25.00-28, 30-ply aircraft tires spaced 56 in. c-c and inflated to 100 psi. The information reported includes layout of the test lanes, characteristics and print dimensions of the load assembly tires, and data collected on soil strengths, surface deformations and deflections, and drawbar pull.
- Terminal Flight Facilities
- Soil Mechanics