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BOOK 183
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BOOK 183
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1/26/2016 5:47:28 PM
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I <br /> _ DILTZGEN'S RAILROAD CURVE <br /> �-� AND <br /> REDUCTION TABLES <br /> L t.1914,by Eu¢ene D t:eea Co.,New York Clay <br /> X /5n9.%yz 41 I <br /> R <br /> - CURVE FORMULAS <br /> Radius=R=RT�U (1)Degree of Curve=D and sin.D=0 (2) <br /> Tangent=T=Rtan3 (3)Length of Curve=L=100,,(4) <br /> Middle ordinate=M=R(1—cos. 6y)(5) =Rvers�(6) <br /> External=E=TtanA-(7)=R=cos.4—R(8)=Rexsec#(9) <br /> Long Chord=C=2 R sin2(10)A=Central Angle <br /> EXPLANATION AND USE OF TABLES <br /> I <br /> Stations.—Given P. I. <br />
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