Choice of wheel/rail coefficient of friction as a basis for the design of mechanical transmission components (IM-APT-341)

Internal memorandum IM/APT/278 defines the adhesion requirements for performance, the variation of µ with V being depicted on drawing SK/APT/285; this graph is represented opposite by the dotted line. The constant power section of this graph assumes a varying value of µ of 18.5 / V which gives µ =...