OFFTRACKING CALCULATION CHARTS FOR TRAILER COMBINATIONS, JANUARY 1966

THE OFFTRACKING CHARACTERISTICS OF SINGLE UNIT AND COMBINATION VEHICLE ARE DESCRIBED. THE OFFTRACKING DATA ARE SHOWN IN TWO CHARTS, ONE FOR 90-DEGREE TURNS, AND ONE FOR 270-DEGREE TURNS FOR VEHICLE WHEEL BASES RANGES FROM 5 FEET TO 55 FEET INDIVIDUAL VEHICLE OFFTRACKINGS ARE INFLUENCED BY THREE VARIABLES' THE DEGREE OF TURN, THE LENGTH OF VEHICLE WHEELBASE, AND THE TURNING RADIUS. IT WAS FOUND THAT THE OFFTRACKING MEASUREMENTS OF A TRAILER COMBINATION MAY BE CALCULATED BY ADDING THE OFFTRACKING MEASUREMENTS OF THE INDIVIDUAL VEHICLES IN THE COMBINATION. THE OFFTRACKING IS GREATEST WHEN THE PROJECTION OF THE REAR AXLE AXIS PASSES THROUGH THE TURNING RADIUS CENTER, EVEN THOUGH THE PROJECTIONS OF THE OTHER AXLES ON THE VEHICLE OR TRAILER COMBINATION DO NOT, AT THE SAME TIME, PASS THROUGH THE TURNING RADIUS CENTER. REFERENCES' OFFTRACKING CALCULATIONS CHARTS FOR TRAILER COMBINATIONS, SAE, NO 650271.

• Corporate Authors:

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • STEVENS, H
  • Tignor, S C
  • Lojacono, J F
• Publication Date: 1966

Subject/Index Terms

• TRT Terms: Calculation; Charts; Length; Measurement; Offtracking; Trailers; Turning radius; Vehicles; Wheel base
• Uncontrolled Terms: Computation
• Old TRIS Terms: Axial movements; Turning path
• Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00222546
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Report/Paper Numbers: Bpr
• Files: TRIS
• Created Date: Jun 1 1994 12:00AM