Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 126
131. i Parallel tracks by a reverse curve. Formulas same as above.The length o o = 2c, length ofa circle arc / = 0-035u R. … 132. The greatest radius in a reverse curve.w = i(7+3y), 17 = w+7 — v,a = »kR, b = wkR, J£ = C sec.w(sln.V—ysin.aF— cos.2w).
Mechanical engineering · Engineering
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