. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Let the distance BO of pin B from thecenter of the wheel represent to a certainscale the value in pounds of the brakingpower \V. Draw ON perpendicular toBO and equal to f, or .3\V. Then BN= Q represents to the same scale the re-sultant force desired. We have also from ABON: iJ Q = VW= (.3W) = Vl-f .09= l.(m W , by drawing the dotted circleOS tangent to BN at S and calling r itsradius, we have, considering W, Q, as segments of lines instead of pounds: .3W .3\V2 r = W sin
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Let the distance BO of pin B from thecenter of the wheel represent to a certainscale the value in pounds of the brakingpower \V. Draw ON perpendicular toBO and equal to f, or .3\V. Then BN= Q represents to the same scale the re-sultant force desired. We have also from ABON: iJ Q = VW= (.3W) = Vl-f .09= l.(m W , by drawing the dotted circleOS tangent to BN at S and calling r itsradius, we have, considering W, Q, as segments of lines instead of pounds: .3W .3\V2 r = W sin = W X = — Q = .287 X BO Then, with reference to Fig. 5, if thecross section to investigate is (a-a) (theone apt to give the greatest stresses), weobserve that the force R, at the top pincauses:. First, a bending moment Pxl, where P,the horizontal component of R, in Fig. 4(a) or LM = 4,000 lbs.; and 1 = 18 , a bending moment PXn, whereP = component of largest value of R,along the direction of line BC, or P =17,600 lbs. approximately; and n = lyiins. Third, a pull V equal to the verticalcomfKjnent of the largest value of R„namely, V = lbs. , a torsional moment Pxe, wheree = 2 ins. and P the value given before. Now, since section (a-a) measures 4/2ins. X 1% ins., we have the followingkinds of stresses per square inch: (1). 4,000 X 18 X 6 = 19,000 lbs. X
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