BEHAVIOR OF AIRCRAFT ANTISKID BRAKING SYSTEMS ON DRY AND WET RUNWAY SURFACES: A SLIP-RATIO-CONTROLLED SYSTEM WITH GROUND SPEED REFERENCE FROM UNBRAKED NOSE WHEEL

An experimental investigation was conducted at the Langley aircraft landing loads and traction facility to study the braking and cornering response of a slip ratio controlled aircraft antiskid braking system with ground speed reference derived from an unbraked nose wheel. The investigation, conducted on dry and wet runway surfaces, utilized one main gear wheel, brake, and tire assembly of a DC-9 series 10 airplane. During maximum braking, the average ratio of the drag force friction coefficient developed by the antiskid system to the maximum drag force friction coefficient available was higher on the dry surface than on damp and flooded surfaces, and was reduced with lighter vertical loads, higher yaw angles, and when new tire treads were replaced by worn treads. Similarly, the average ratio of side force friction coefficient developed by the tire under antiskid control to the maximum side force friction coefficient available to a freely rolling yawed tire decreased with increasing yaw angle, generally increased with ground speed, and decreased when tires with new treads were replaced by those with worn treads.

• Corporate Authors:

  Langley Research Center

  National Aeronautics and Space Administration
  Hampton, VA  United States  23665
• Authors:
  • Tanner, J A
  • STUBBS, S M
• Publication Date: 1977-10

Media Info

• Pagination: 167 p.

Subject/Index Terms

• TRT Terms: Aircraft; Airport runways; Brakes; Braking; Coefficient of friction; Drag; Ground speed; Landing; Pavements; Skid resistance; Skid resistance tests; Test facilities; Tires; Wet weather; Yaw
• Identifier Terms: McDonnell Douglas DC-9
• Uncontrolled Terms: Wet pavements
• Old TRIS Terms: Aircraft landing; Aircraft tires; Antiskid devices
• Subject Areas: Aviation; Pavements; Terminals and Facilities; Vehicles and Equipment;

Filing Info

• Accession Number: 00174575
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NASA-TN-D-8455
• Files: TRIS
• Created Date: Mar 14 1978 12:00AM