MEASURING TIRES FOR HARMONIZED FRICTION MEASUREMENTS OF RUNWAY SURFACES AND PREDICTION OF AIRCRAFT WHEEL BRAKING

This project compares the various tires used to measure runway friction for both summer and winter conditions in order to harmonize different friction measurement devices. Measurements with the various tires were compared to measurements with the National Aeronautics and Space Administration (NASA) Integrated Tire Test Vehicle (ITTV) system using an aircraft tire. Subsequently, comparisons will be made with the NASA ITTV and actual aircraft braking. Ribbed treaded tires versus smooth treaded tires are discussed based on the literature and actual test results. The effects of natural rubber versus the American Society for Testing and Materials (ASTM) compounds for temperature and slip speed were also studied, and a review of a study by the Federal Aviation Administration found that the repeatability of the natural rubber tire (DICO tire) was unsatisfactory for friction measurement on fixed and variable slip devices. Field tests showed that the AERO tire produces a lower reading than other tires in bare and dry conditions. In wet conditions, almost all devices produce similar values, lower friction than on dry pavement, and a speed effect that depends on the surface texture. Rough ice produces higher values than smooth ice and the coefficient of friction decreases with increased vertical load (tire contact pressure). Based on the results of this study, it is recommended that the ASTM smooth treaded test tire should be used with 207 kPa (30 psi) pressure for summer or surface maintenance testing and a high contact pressure tire should be used for winter measurements, especially for torque measuring devices on loose snow. Further research directions are suggested.

• Record URL:
  • http://data.tc.gc.ca/archive/eng/innovation/tdc-summary-14000-14005e-671.htm
• Corporate Authors:

  Transport Canada

  Transportation Development Centre, 800 Rene-Levesque Boulevard West, Suite 600
  Montreal, Quebec  Canada  H3B 2X1

  CDRM Incorporated

  1911 East College Avenue, P.O Box 1277
  State College, PA  United States  16804
• Authors:
  • Wambold, J C
• Publication Date: 1998-2

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 43 p.

Subject/Index Terms

• TRT Terms: Aircraft; Airport runways; Braking performance; Coefficient of friction; Friction; Ice; Landing; Mathematical prediction; Measurement; Natural rubber; Speed; Summer; Takeoff; Test vehicles; Testing; Tire forces; Tire treads; Tires and wheels; Winter
• Identifier Terms: U.S. National Aeronautics and Space Administration
• Subject Areas: Aviation; Data and Information Technology; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00941172
• Record Type: Publication
• Report/Paper Numbers: TP 14005E
• Contract Numbers: T8200-8-8593/001/XSD
• Files: TRIS
• Created Date: Apr 12 2003 12:00AM