. Automotive industries . In all cases thereis a premium for applying to the limitthe traffic managers common sense andexperience in his line of transportationwork, while in the selection of motortrucks good business judgment is notenough but must be supplemented byscholarly insight in engineering andpositive knowledge of the truck datawhich experience has established. Theunaided business man must usually relyin large degree on commercial faith inbuying motor trucks, but in buying trail-ers his own competence can easily be madegood enough. Summary of Mechanical Requirements The requirements an
. Automotive industries . In all cases thereis a premium for applying to the limitthe traffic managers common sense andexperience in his line of transportationwork, while in the selection of motortrucks good business judgment is notenough but must be supplemented byscholarly insight in engineering andpositive knowledge of the truck datawhich experience has established. Theunaided business man must usually relyin large degree on commercial faith inbuying motor trucks, but in buying trail-ers his own competence can easily be madegood enough. Summary of Mechanical Requirements The requirements and functions whichmust be reflected in the mechanical equip-ment of trailers may be summarized asfollows with special reference to each ofthe four types and to train formation : Four-wheel Trailers—Operation byone person, and he the driver of themotor and uncoupling handy, safeand reliable but not drawbar steering in with driving wheels of. Twill screw jacks hinged to trailer frame and ar-ranged to be folded away by chain and winch. Bothjacks are rawed or lowered in unison by a crankfrom either side, but each may he adjusted inde-pendently 266 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE February 10, 1921 motor unit, approximate oras close as demanded bylaw. Backing and maneuvering. Braking, if high speeds orhilly roads are factors. Reversibility, if required. Two-wheel Trailers—Simplic-ity is the keynote for thistype, which is usually in-tended for light loads bal-anced over the axle. When intended for heavierwork, drawbar and cou-plings should be equal tothose required for four-wheeled trailers and shouldtend to prevent teetering. Supports for either end whenthe vehicle is unhitched, tofacilitate loading. Semi-trailers—Operation b yone person, and he thedriver of the motor unit. Equivalent of double-cushiondrawbar action. Adequate support for frontend when unhitched, ad-justable in height. Simplici
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
