0 VAN NOSTRAJNT>'S ENGIIsTEEElKG MAGAZINE. If the frog number be known the exact In the triangle AFC, Fig. 2, point F or intersection of the gauge sides FC of the rails may be readily found by de- cot.iAFB. AC termining the pointy, Fig. 2, when the Put n— number of frog, f=irog angle then FC FC… … Case 1. — Turnout from a tangent. In Fig. 3 the frog angle /*FH=FCH, since F/is perpendicular to FC and FH' distance across is exactly 1 inch. Then toCH. measure from this point to F as many Also H'FH = FHB = the deflection inches as there are units in the number of angle of turnout curve, and…
Engineering
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