...
To determine our steering arm angle we use perfect Ackerman principles and draw a line directly from the mounting point of our steering arm on the front axle to the centre point of our rear axle, this is represented by the formula: ArcTan( ((Track/2) - Mounting distance from wheel) / Wheelbase ), where Mounting distance = the distance between the wheel and the steering arm mounting point = 80 mm, wheelbase = 2600 mm and Track = 1600 mm. Therefore our steering arm angle is 15.47 degrees.
The below sketch was used to determine a series of steering geometry equations:
To determine our steering arm length, tie rod length, and maximum rack travel we derived a series of equations using the physical geometry of our car. These equations are as follows:
...
A further explanation of this derivation can be explained by asking Robin Pearce (rsgpearce@gmail.com).
The following spreadsheet does the following calculations and takes input as steering arm length, total rack travel and total rack length.
| View file | ||||
|---|---|---|---|---|
|
Component Selection
| Google drive sheets | ||
|---|---|---|
|
...