AN INVESTIGATION INTO MEASURING RUNWAY SURFACE TEXTURE BY THE GREASE PATCH AND OUTFLOW METER METHODS

A measurement of 'surface texture' is used by some organizations as a means of specifying runway friction for stop distance calculations and certification purposes in spite of the conclusion by the American Society for Testing and Materials that it should be discontinued. This investigation confirms the ASTM conclusions by demonstrating the poor relationship between 'surface texture' and aircraft stop distance also between it and friction measured by two ground vehicles. A method of using 'surface texture' to predict friction of ground vehicles at high speed has been studied and the conclusion is reached that within the limits found on runways it has only a very small effect on the prediction. The investigation recommends that where high speed prediction is necessary a more accurate method is to use equations based on test data. The difficulty in arriving at a single figure for 'surface texture' is demonstrated by showing the variation that can occur along a runway and the large difference in readings between operators. (Author)

  • Corporate Authors:

    Defence Research Information Centre, England

    Orpington,   England 
  • Authors:
    • Sugg, R W
  • Publication Date: 1979-10

Media Info

  • Pagination: 35 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00312914
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DRIC-BR-70263, S/T-MEMO-2-79
  • Files: TRIS
  • Created Date: May 7 1980 12:00AM