22 



INFLUENCE DIAGRAMS 



moments at V, the influence diagram, constructed according 

 to the general rule, is C'EB'F'C'. The distance C'D' 



is laid off equal to (AK) \yj V in order that the moments 



may be equivalent to taking U 3 as a center of moments. 

 The diagram is inverted and when combiner! with the 



Tan 0i=l. Tan 02=^-7-. Tan 63 =4 



FIG. 14. 



previous diagram the two form the influence diagram for 

 s, as shown by the shaded area DAEFBD. 

 Referring to Fig. 14, 



" A v - KT? 

 ::Ar : Ar or 



but 



therefore 



D'C' =AK 



AF 

 KF=d' 



vv 

 EK= 



(AK)(AF) KF 

 ~KF~ ' 



