HIGHWAY GRADES AND MOTOR VEHICLE COSTS

A DIRECT METHOD OF COMPUTING THE RELATIVE USE OF GASOLINE ON GRADES AND ON THE LEVEL AT DIFFERENT CONSTANT SPEEDS IS PRESENTED, WITHOUT RECOURSE TO THE UTILIZATION OF KINETIC ENERGY NOR TO THE METHOD WHICH MAKES USE OF THE POTENTIAL ENERGY FOR A "RISE" OF ONE FOOT. OBSERVED RANGES OF ROLLING PLUS AIR RESISTANCE ARE GIVEN. GRADES, THE DESCENT OF WHICH AT A SPECIFIED CONSTANT SPEED REQUIRE NEITHER POSITIVE NOR NEGATIVE POWER FROM THE ENGINE ARE DESIGNATED AS "FLOATING GRADES." RANGES OF FLOATING GRADES FOR PASSENGER CARS ARE COMPUTED. COMPARISONS OF AVERAGE AMOUNTS OF GASOLINE FOR ASCENDING AND DESCENDING GRADES WITH AMOUNTS USED ON THE LEVEL ARE MADE. NO-EXTRA-GASOLINE- COST GRADES ARE DETERMINED, ALTHOUGH MORE DATA ON STRAIGHT- LINE CHARACTERISTICS OF ENGINE (AND CARBURETORS) OF MODERN CARS ARE NEEDED FOR MORE PRECISE DETERMINATION. EXAMPLES OF APPLICATION AND EXTENSION OF THE METHOD TO SEVERAL INDIVIDUAL UP-TO-DATE TRUCKS ARE GIVEN TO BRIEF, AND ITS APPLICATION TO THE PROBLEM OF JUSTIFICATION OF EXPENDITURES FOR GRADE REDUCTION IS DISCUSSED. /AUTHOR/

  • Supplemental Notes:
    • Vol 12, Pt 1, PP 91-104, 2 FIG, 6 TAB
  • Authors:
    • Shaw, H B
  • Publication Date: 1933

Media Info

  • Monograph Title: Proceedings of the Twelfth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 1-2, 1932. Part I: Reports of Research Committees and Papers
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00203483
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jun 1 1971 12:00AM