Design Procedure for Establishing Aircraft Capability to Operate on Soil Surfaces
DAYTON UNIV OH RESEARCH INST
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This report summarizes a systematic design procedure for establishing various landing gear combinations of tire sizes, spacings, and configurations which will minimize rolling drag and satisfy the criteria of 200 nonbraking passes of a selected STOL aircraft operating on a standardized CBR6 or equivalent soil surface. The design procedure presented herein combined the latest results of Air Force sponsored landing gearsoil interaction research with the previously developed WES coverage techniques. This procedure is a first attempt to make the research results of existing Air Force Flight Dynamics Laboratory programs available toward the improvement of flotation design capability. This design procedure, subject to certain stated limitations, includes techniques for 1 predicting rolling and braking drags and drag ratios, 2 incorporating multiwheel influences on drag and sinkage, and 3 determining aircraft passes. Additionally, the design procedure has been incorporated in a computer program format for utilization on the CDC 6600 located at Wright-Patterson Air Force Base. The computer program is restricted at present to aircraft with tricycle type landing gear systems.