Steering Geometry 1

1. The values of the required geometric parametres are as follows:

1. Caster = 5.37 degrees
2. Mechanical trial = 9.41mm
3. Kingpin Inclination = 10.0079 degrees
4. Scrub Radius = 32.36 mm
5. Longitudinal offset = 82.26 mm

https://drive.google.com/open?id=1yYpk8wBmgWCxejqZ8-VRYkJoF9fF6L9t

https://drive.google.com/open?id=1ce-SrOqs7onKhcMQzSJfHFRHoeBKUq0F

2. Given:

Lateral Force = 2000N

Pneumatic trial = 25 mm

Mechanical trial = 9.41 mm (as calculated)

Restoring moment = Lateral force*(mechanical trial + pneumatic trial)

Restoring moment = 2000*(9.41 + 25)

Restoring moment = 2000*34.41

Restoring moment = 68820 N-mm

OR

Restoring moment = 68.82 N-m.

3. With the above given COORDINATES, we get a positive scrub radius.

The length of the kingpin using the given COORDINATES is found out as follows:

L=√[{-675-(-750)}^(2) + {525-100}^(2)]

L=431.56mm

Keeping LCA Ball joint fixed at (-750,100) and making scrub radius zero, the new coordinates of UCA knuckle ball joint are found out.