00201899

Component

https://onlinepubs.trb.or...bproceedings/11/11-002.pdf

TESTS ARE PRESENTED OF THE AIR RESISTANCE OF MOTOR VEHICLE BODIES, INCLUDING A STUDY OF TEST METHODS AND AERODYNAMIC CHARACTERISTICS OF SOME SIMPLE BODY FORMS. WIND TUNNEL TESTS OF HIGHWAY VEHICLES ARE COMPLICATED BY THE FACT THAT A ROAD SURFACE MUST BE PROVIDED. TESTS WERE MADE BY FOUR METHODS: (1) MODEL FREE, NO ROAD SURFACE PROVIDED; (2) USING A FLAT PLATE AS THE ROAD SURFACE; (3) USING THE FLAT PLATE WITH PLATE WITH BOUNDARY LAYER PARTIALLY REMOVED; AND (4) REFLECTION METHOD, USING DUPLICATE MODELS PLACED BOTTOM TO BOTTOM. THE DATA SHOWING THE PERCENTAGE OF IMPROVEMENT DUE TO STREAMLINING ARE FAIRLY CONSISTENT WHEN MEASURED BY ALL FOUR METHODS. /AUTHOR/

Vol 11, Pt 1, PP 36-55, 21 FIG, 10 TAB; part of Report of Committee on Highway Transportation Costs. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01490418

1932

Highway Research Board Proceedings

Digital/other

Aerodynamics; Air resistance; Boundary layer; Motor vehicles; Reflection; Surface course (Pavements); Test procedures; Wind tunnels

Economics; Highways; Society

TRIS, TRB

Jul 2 1971 12:00AM

• A NEW THEORY OF FROST HEAVING
• DISCUSSION ON FROST HEAVING
• DISCUSSION ON LOW COST BRIDGES
• ECONOMICS OF LOW COST BRIDGES
• ECONOMICS OF LOW COST HIGHWAY BRIDGES
• ECONOMICS OF LOW COST HIGHWAY BRIDGES
• FACTORS AFFECTING VOLUME CHANGES IN CONCRETE AND THEIR SIGNIFICANCE IN DESIGN
• FIELD EXPERIMENTS IN SUBGRADE DRAINAGE AND TREATMENT
• FIELD METHODS FOR MEASURING TIRE WEAR
• Fillers and Bedding Courses for Brick Pavements
• FUNCTIONS OF STEEL REINFORCEMENT IN CONCRETE PAVEMENTS AND PAVEMENT BASES
• LOAD LIMITATIONS ON HIGHWAYS
• LOW COST STEEL HIGHWAY-BRIDGES
• REPORT ON CULVERT INVESTIGATION
• REPORT ON STATE CONTROL OF TRAFFIC
• REPORT ON TRAFFIC LAW OBSERVANCE AND ENFORCEMENT METHODS
• REPORT ON VEHICLE AND HIGHWAY MECHANICS AS RELATED TO TRAFFIC
• RESISTANCE OF CONCRETE TO FROST ACTION AS AFFECTED BY THE WATER-CEMENT RATIO
• SOME PRINCIPLES OF SOIL SURVEYING AND SOIL MAPPING FOR ROAD PURPOSES
• TAXATION AND EXPENDITURES IN THE STATE OF WISCONSIN
• THE ECONOMICS OF LOW COST BRIDGES
• THE EFFECT OF HOT CEMENT ON TIME OF SET AND WORKABILITY OF CONCRETE
• THE EFFECTIVENESS OF CALCIUM CHLORIDE AS A DUST PALLIATIVE AND ITS VALUE TO GENERAL ROAD MAINTENANCE
• THE SIGNIFICANCE OF SODIUM SULFATE AND FREEZING AND THAWING TESTS OF MINERAL AGGREGATES
• TRAFFIC CAPACITY
• TREATMENT OF ICY PAVEMENTS
• USE OF CONCRETE AS AN ECONOMIC HIGHWAY BRIDGE MATERIAL
• VOLUME CHANGES IN CONCRETE SLABS IN THE FIELD