Steering Geometry 1
1. Geomteric Parameters calculations:
- Caster(`theta`) =`tan^-1` [UCA_KBJ_X/(UCA_KB_Z - LCA_KBJ_Z)]
- Mechanical trail = tan(`theta`)*(LCA_KBJ_Z)
- KPI(`phi`) = `tan^-1`[(UCA_KBJ_Z -LCA_KBJ_Z)/(UCA_KBJ_Y-LCA_KBJ_Y)]
- Scrub Radius = WC_Y - [tan(`phi`)*LCA_KBJ_Z]-LCA_KBJ_Y
- KP Lat offset or spindle length =(WC_Y - UCA_KBJ_Y) - [tan(`phi`)* (UCA_KBJ_Y-WC_Y)
2. given : Pneumatic trail of 25mm & Lateral force of 2000N
Ans : Self aligning moment in N-m = Lateral force * [ Mechanical trail + Pneumatic trail]/1000
3. Hardpoint recommendation to change the sign of the scrub radius :
Ans : a) Shift UCA Knuckle ball joint towards right (+ve Y) such that the scrub radius sign changes
b) Shift LCA knuckle ball joint towards left (-ve Y) such that scrub radius sign changes
c) Shifting them simultaneously keeping the space for other parts to keep it compact for packaging