Braking of an Aircraft Tire on Grooved and Porous Asphaltic Concrete

Details

• Creators:
  Agrawal, Satish K.
• Corporate Creators:
  United States. Department of Transportation. Federal Aviation Administration. Technical Center ; United States. Department of Transportation. Federal Aviation Administration. Systems Research & Development Service
• Subject/TRT Terms:
  Airport Runways Asphalt Concrete Pavements Braking Performance Hydroplaning Pavement Grooving Porous Pavements Wet Weather
• Publication/ Report Number:
  DOT/FAA/CT-82/147, DOT/FAA/RD-82/77
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center
• Abstract:
  Runway grooving is an effective surface treatment that reduces the danger of hydroplaning to an aircraft landing on a water-covered runway. Grooves are usually cut by diamond-tipped rotatory blades; square grooves of 1/4-inch size are widely used. Other surface treatments include grooving by a reflex-percussive cutting process, grooving while the concrete is in plastic state, and the porous friction overlays. Grooving in plastic state is limited to portland cement concrete runways only while the other treatments can be applied to both the portland cement concrete and the asphaltic concrete surfaces. The effectiveness of some of these treatments has not been evaluated on asphaltic concrete surfaces prior to the initiation of this study. This report describes an experimental program that investigated the braking and hydroplaning performance of an aircraft tire on asphaltic concrete surfaces having various treatments. The tests were conducted on a dynamic track in the speed range of 70 to 150 knots, and under other operating conditions whose magnitudes represented values widely used by airlines or aircraft. The results show that the type of surface treatment has a significant influence on the braking performance of an aircraft tire on "puddled" runways. Grooves at closure spacings provide higher friction levels. When the runways are "wet" or "flooded" the braking capability on all surfaces is either very high or very low, respectively. The braking performance on the reflex-percussive grooves, the porous friction overlay, and the saw-cut grooves spaced at 3 inches is comparable.
• Format:
  PDF
• Collection(s):
  FAA William J. Hughes Technical Center for Advanced Aerospace
• Main Document Checksum:
  urn:sha-512:922897ba1b0ed1e8c382a3d7beb54c82699f6dd56df0306743bb57a5c3b464e549f975353827a07cc33dc1f58ade4fd0452f89e33ee07f936890560efbb3266c
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/92368/dot_92368_DS1.pdf
• File Type:
  [PDF - 2.07 MB ]