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<br />Turning Track Plot <br /> <br />Step 4. Construct Chassis Sketch on Turning Circle <br />a) If Tractor-Semitrailer construct tractor with fifth wheel pivot center (top view) <br />b) If Straight Truck construct complete chassis (top view) <br /> <br />2700 <br /> <br /> <br />00 <br /> <br />Rear Axle or Tandem <br />Axle (Bogie) Centerline <br /> <br />Turning Circle <br /> <br />fifth wheel <br /> <br />pivot center <br /> <br /> <br />Note: Perpendiculars dropped <br />from front wheels and <br />through centerline <br />tandem or rear axle all <br />pass through T.C. <br /> <br />900 <br /> <br /> <br />Scale: 1 inch . 200 inches <br /> <br />1800 <br /> <br />c) Construction <br />1. Draw the centerline of the tandem or rear axle, with the vehicle just starting to turn, through <br />the Turning Center (T.C.) <br />2. From the line drawn through the T.C. for 1., strike two arcs equal in length to the WB. <br />Placement can be anywhere along the line, if arcs are spaced one inside, one outside the <br />turning circle. <br />3. Draw the tangent common to the two arcs (parallel to the line for step 1). <br /> <br />20 <br />