Transference of wheel loading (C15)

Abstract

A vehicle under retardation due to braking, Fig. 15.1, has the frictional forces (F_F and F_R) introduced between tyres and road surface, and at the same time an equal but opposite inertia force (F_T) acts at the point of centre of gravity creating a moment F_Th N m which transfers weight (w) or vertical loading from rear to front wheels. If R_F and R_R are the reactions at the wheels when at rest on a level surface, during retardation they will become R_F + w, and R_R − w. The value of the weight transferred may be determined by taking moments.