SOD AND MATTED LANDING SURFACE ROUGHNESS CHARACTERISTICS
Technical memo. for Aug-Sep 1964
AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
Limited sod and matted surface characteristics in the form of profile and power spectral density plots, discrete bump and dip distributions and maximum heights and depths for various wavelengths are presented. The power spectral densities for the sod and multi-matted surfaces show higher roughness characteristics than the power spectral density for the roughest prepared surface which had been previously established from a survey of 25 air bases throughout the United States. Also, for the limited data gathered, the multi- matted surface was rougher than the sod surface. When a comparison is made between the M9M1 and Convair aluminum matting and the pierced steel planking, it is apparent that the higher roughness characteristics of the multi-matting are due primarily to the pierced steel planking. Significant discrete and narrow band power peaks are evident in the power spectra of the matted surface over the reduced frequency range of approximately 6 radians per foot to .2 radian per foot which corresponds to wavelengths ranging from approximately one foot to thirty feet. To a lesser degree, peaks are also present in the power spectra of the sod field.
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