. The Street railway journal . 1 27 -18 -5227 -54 -30 IA UO _,V ^ >. + * X II c H + + « + i& £+ ■rl S-0S R From To Tangent 90°. Abs. of Middle Center. Ord. of Middle Center. Formulae. PLAIN. 3336404552 3640455260 .63617 R + R + R + R + R + .31344 (36—R) + (40—Rj + (45-R) + (52-R) + (60—R) + —.94961 (36——.96555 (40—R)—.97735 (45—R)52 246—.98580 (52—R) (60-R) For symmetrical 90° curve;Tan = R (c
. The Street railway journal . 1 27 -18 -5227 -54 -30 IA UO _,V ^ >. + * X II c H + + « + i& £+ ■rl S-0S R From To Tangent 90°. Abs. of Middle Center. Ord. of Middle Center. Formulae. PLAIN. 3336404552 3640455260 .63617 R + R + R + R + R + .31344 (36—R) + (40—Rj + (45-R) + (52-R) + (60—R) + —.94961 (36——.96555 (40—R)—.97735 (45—R)52 246—.98580 (52—R) (60-R) For symmetrical 90° curve;Tan = R (cos s —sin s) + Abs. S +Ord. SF^or svmmetrical curve, any angle ;Tan = Ct. Abs. + Ord. x tan Kii AEx. Sec. = Ct. Ord. x sec. % A — R 52 68 .86190 R + .12966 (68—R) + 2 559 —.99156 (68—R) Ct. lA A — R £ <S1 68 80 .89159 R + .10308 (80-R) + —.99467 (80—R) S = en d of spiral approach, s = A a t s. February, 1899.] STREET RAILWAY JOURNAL. 85.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
