Quote - Yup, you're right there.  However, the centre of rotation must change, since a car does not execute a turn all at once.  The front wheels eventually go to their "turn" position, then straighten out again.  I confess I have absolutely no idea how to represent this, though.

Good point, pfhew this was a long time ago for me.
Best way to solve this might be the next:
Draw a spoke from the center to the circle and place the back wheels on that spoke.
In a turn the front wheels wil follow the circle but leave the circle first when they steer.
The back wheels alway's follow the front wheels and stay on the circle until they are forced off by steering of the front wheels who wil go follow another traject. If this is another turn, you have to redraw the circle again.
A steering car is more complicated than you might think

Quote - Well, yes.  And that's my point.  The vehicle I mentioned (I honestly cannot remember who makes it) has only the fixed option, which seems silly to me.  It would make more sense to have the option of a diff lock, rather than be stuck (pun intended) with a fixed axle.

Very true.
The only thing I can think of is that the wheels turn freely on ballbearings on the axel.
Diff lock was the word I was loking for, in general you find those on terain cars.
The only fixed axle I can think of might be on a dragracer, since those only drive straight and they can rule out any losses in the drive train by removing the differential.
I also think that some tracktor pullers use this, but I am not sure about both.

I am not a complete idiot, some parts are missing :)

To go to my home page, click the banner below.



Check my freebies on a regular base, click the banner below.