Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 128
134. By ordinates and sub chords. t = R cot. W=R tan.w, W=$0—w, S= R (sec.w—1) = R Ccosec. W—1) C=k R. For k, see table of segments. 135. Ellipse by ordinates. 1 = 0-4840(7 5=0-9204(7 2=06616(7 6=0-9682(7 3=0-7808(7 7=0-9922(7 4=0-8660(7 8 = (7 the unit. 136. … Parallel tracks by elliptic curve. h=lti. w=2v. 17=2 7,, C sin. W „ Csiii.w C =-0-: » C = o ^~T>-, 2 sm.u 2 sm. 7 See example for ordinates. 137. Tracks not parallel by elliptic arc. Angle of the arc = W-\- w. Ordinates to be calculated from the table. 138. Spring of Rails.1-5 U R -= spring m…
Mechanical engineering · Engineering
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