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AIRCRAFT GROUND-FLOTATION INVESTIGATION. PART XIII. DATA REPORT ON TEST SECTION 13
Final technical rept.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
Pagination or Media Count:
The work presented in this data report was 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 with M8 steel landing mat, and item 3 remained unsurfaced. Traffic was applied to both lanes using a 70,000-lb test load on a twin-wheel tracking assembly consisting of two 25.00x28, 30-ply aircraft tires inflated to 50 psi. On one lane the wheels were spaced 58.5 in. c-c and on the other lane wheel spacing was 29.5 in. c-c. The information reported herein 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. The traffic-coverage level is given at which each test item was considered failed.
APPROVED FOR PUBLIC RELEASE