A description is presented of 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. Two items were unsurfaced, and the remaining item was surfaced with modified T11 aluminum landing mat. Traffic was applied to the lanes using a 104,000-lb load on a twin-wheel assembly consisting of two 56.00-16, 36-ply aircraft tires with inflation pressure of 200 psi. Wheel spacing was 37 in. c-c for one land and 24 in. c-c for the other. Also presented is the data collected on soil strengths, surface deformations and deflections, and drawbar pull. The traffic-coverage level at which failure was evidenced on each test item is given. (Author)
Aircraft Ground-Flotation Investigation. Part II. Data Report on Test Section 1
1966
25 pages
Report
No indication
English