Page Comparison

Crabbing is a type of wheel alignment where all wheels are parallel to each other but nonparallel to the body. This method of steering helps reduce wind resistance by aligning the car’s front with the direction of the wind to minimize air friction caused by side winds. The most relevant example of crabbing being implemented is the BluePoint car designed by the Agoria Belgian Solar Car Team(scroll down to “steering” header).

...

Background information(All Wheel Steering)

Before discussing crabbing, a brief visual overview of the three main phases of all wheel steering will be provided:

Diagram

Image Added

Also known as

counter-phase rotation
negative phase

in-phase rotation
positive phase

zero rotation
neutral phase
front/two wheel steering

For more background information, the 4 wheel steering confluence page is a great starting point.

How can crabbing be achieved?

-working on this part

Intentional misalignment of the rear wheels to change thrust angle

Changing the thrust angle of the rear axis will induce crabbing, as shown in figure 2 below. To accomplish this, the rear wheels of the car must first turn together to swing the rear left or right. The front wheels then turn with the car to accommodate this.

...

Since crabbing requires four all wheel steering, it is slightly more complex than traditional four or three wheel systems. To implement crabbing, a method to control the pairs of rear wheels and front wheels wheel(s) independently is needed.

Considerations and Drawbacks

...