The overall purpose of this program was to develop a quick, accurate, prediction for one-pass performance of a vehicle operating in fine-grained soft soil conditions and a slippery soil layer over a hard-pan. The specific objective was to predict performance using existing analytical Land Locomotion Mechanics expressions as a datum for new relationships. Performance curves of drawbar-pull vs slip were constructed from measured vehicle tests and on the basis of measured Land Locomotion Mechanics Soil Values. Coefficient of friction values were obtained for the slippery soil layer condition in the same manner. Predicted performance for the vehicles tested was within the accuracy level of 25% (that is expected from Land Locomotion Mechanics prediction techniques) for 55% of the tests conducted. The remaining 45% of the test results indicated the need, in some instances, for more realistic test techniques with regard to the vehicle test and soil data collection. A quick-data reduction procedure for predicting performance cannot be readily obtained. (Author)
Mobility Environmental Research Study One-Pass Program
1965
66 pages
Report
No indication
English