Steering Geometry 1

1. i) Caster -

Difference For caster X	-40	-75	-425
X/Z	0.094118
Tanh(X/Z)	0.093841	Radians
Caster	5.376604	Degrees

Caster = 5.37 Degrees

ii) Mechanical Trail -

D X(Base of Tire and LWR BJT)	0
D Z(Base of Tire and LWR BJT)	200
Caster angle	0.093841	Radians
Mechanical Trail	18.8234	mm

Trail = 18.823mm

iii) King Pin Inclination

Difference for KPI	40	75	425
Y/Z	0.176471
tanh(Y/Z)	0.174661	Radians
King Pin Inclination	10.00722	Degrees

KPI = 10.00 degrees

iv) Scrub Radius

D y(Base of Tire and LWR BJT)	-750
D Z(Base of Tire and LWR BJT)	-200
KPI	0.17	Radians
Scrub Radius	-715.669	mm

Scrub Radius = -717.66mm

v) King Pin Lateral Offset

Spindle Length = 259.595mm

2.Restoring moment Acting in the point where King pin Intersects ground in Side View is (122.128+25)*2000=294200N-mm

3.Changing the LCA Knuckle Ball Joint point in Y direction will give positive Scrub.Making the Y dtance positive will give you positive scrub.