Hi, im thinking of building a land yacht but im still struggling with some issues. Oh and please note that english is not my native language.

The thing is, i can see that almost every land yacht is steering its front wheel under a certain angle. Why is this? I tried searching this forum but i can't find it. I tried some steering with a scale model and i couldn't find a major difference between the steering performance. However i can imagine that the forces would be better distributed if the wheel is turning under an angle and the force is coming from the front.

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and

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Are there any differences beside this one? I don't expect mathematical explanations but i just wonder if there are more differences.

My next question would be, what angle for what use? This, because i'm wondering why there are so much differences between the angles of different land yachts...