. Automotive industries . twheels make a leading point in relation to the truck rearwheels and the hook, the hook a leading point in rela-tion to the trailer front wheels, and the latter a leadingpoint in relation to the trailer rear wheels, but the con-struction is simplified for a simple and sustained circu-lar turn with a known center and no change of curve of the leading point in Fig. 14 may be com-posite and of any degree, and the points, 1 to 14, selectedfor determination of corresponding points on the trailercurves, need not be equidistant. The data for construc-tion are two,
. Automotive industries . twheels make a leading point in relation to the truck rearwheels and the hook, the hook a leading point in rela-tion to the trailer front wheels, and the latter a leadingpoint in relation to the trailer rear wheels, but the con-struction is simplified for a simple and sustained circu-lar turn with a known center and no change of curve of the leading point in Fig. 14 may be com-posite and of any degree, and the points, 1 to 14, selectedfor determination of corresponding points on the trailercurves, need not be equidistant. The data for construc-tion are two, (1) that the trailing point is a given dis-tance from the leading point, and (2) that the trailingpoint wheel follows a curve to which it can be at everypoint tangential. From each of the points on the leadingcurve there is, therefore, described a circle with the dis-tance to the trailing point as radius, and, beginning withthe original position of the trailer point, the shortest AUTOMOTIVE INDUSTRIES THE AUTOMOBILE 1009. Fie. 13 Turns made with a trailer outfit on a 30-foot road with turning radiusof respectively 30 and 20 feet. The outfit is In both cases a truck of 10 feetwheelbase drawing a four-wheel trailer of 15 feet wheelbase, but the overhang ofthe coupling hook is made longer in the second instance to produce closer length of the trailer wheelbase operates to the contrary, however. Snakingeffects appear plainly In the diagram of the sharper turn. By considering thecorner of the road for different locations, as indicated in broken lines on Fig. 12,an idea can be formed of the best place to begin a turn for different conditions oftraffic, or when the question is of turning from one road to another of differentwidth, the expedient of moving the corner on paper being applicable to any diagramdrawn. Some trailers of 15 feet wheelbase will not be able to make the sharp turnin Fig. 13. because their front wheels cannot be turned to an angle as large asthat here
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
