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<br />1000 <br /> <br />900 <br /> <br />800 <br /> <br />700 <br /> <br />300 <br /> <br />200 <br /> <br />.i <br /> <br />100 <br /> <br />o <br /> <br />~8 <br /> <br />65 <br />. 131 ' <br /> <br />27 <br /> <br /> <br /> <br />10 1/6 <br />-1 rs-mr--21---i 6 1/6 <br />21/3 25/6 <br /> <br />Off Tracking Characteristics of a Doubles <br />Unit-Maximum Off Track <br /> <br />Maximum Off Track <br /> <br />V(Wb)2 + tV tr2 - wb2 - ht)2 - <br /> <br /> <br />.y ka2 + (-V tr2 - wb2 - ht)2 - ka2 + ap2 . db2 _tb2 <br /> <br />where: wb <br />tr <br />ht <br />ko <br />ka <br />ap <br />db <br />tb <br /> <br />8 2/3 = tractor wheel base <br />50 to 1000 = turning radius <br />3.21 = front wheel track ~ 2 <br />o = Kingpin offset <br />21 = Kingpin to semitrailer axle <br />2 5/6 = rear axle of semitrailer to pintle hook eye <br />6 1/6 = drawbar eye to front axle of full trailer <br />21 = full trailer wheelbase <br /> <br />Maximum Off track + Maximum Vehicle Width <br />Maximum Track Width <br /> <br /> <br />2.5 <br /> <br />5 <br /> <br />7.5 <br />OFF-TRACK (feet) <br /> <br />10 <br /> <br />12.5 <br /> <br />27 <br /> <br />: I <br /> <br />21 <br /> <br />~~ <br /> <br />15 <br />