Development of CBR Design Curve for Modified AM1 Landing Mat. Rept. for Jan-Mar 63

摘要

The investigation was conducted to develop a CBR design curve for modified AM1 landing mat fabricated by Butler Manufacturing Company, Kansas City, Missouri. The design curve was to indicate the subgrade strength required, when the subgrade is surfaced with the modified Butler AM1 mat, to withstand 1600 operational cycles of an aircraft having a 60,000-lb gross weight with a single-wheel, main-gear assembly load of 27,000 lb and a 30.00-7.7 tire inflated to 400 psi. It was also desired to test the modified AM1 mat fabricated by Fenestra, Inc., Philadelphia, Pennsylvania, in order to obtain comparative data. (Author)