what would be the effect on the tyres wihtout the ackermann principle?

Answer 1

Severe wear at the outer edges and very poor steering response.

Answer 2

Ackermann steering geometry is a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radii.
Part of steering mechanism: tie rod, tie rod ends, steering arm.When a vehicle is steered, it follows a path which is part of the circumference of its turning circle, which will have a centre point somewhere along a line extending from the axis of the fixed axle. The steered wheels must be angled so that they are both at 90 degrees to a line drawn from the circle centre through the centre of the wheel. Since the wheel on the outside of the turn will trace a larger circle than the wheel on the inside, the wheels need to be set at different angles.
The Ackermann steering geometry arranges this automatically by moving the steering pivot points inward so as to lie on a line drawn between the steering kingpins and the centre of the rear axle. The steering pivot points are joined by a rigid bar, the tie rod, which can also be part of the, for example, rack and pinion steering mechanism. This arrangement ensures that at any angle of steering, the centre point of all of the circles traced by all wheels will lie at a common point.
Without this arrangement the tyres would wear out dramatically and steering would be heavy on the suspension and other parts of the car.
Modern cars do not use pure Ackermann steering, partly because it ignores important dynamic and compliant effects, but the principle is sound for low speed manoeuvres.

Answer 3

Barrowman's blatant plagiarism from Wikipedia describes the principle soundly! The result if it was not considered in steering geometry would be increased wear on tyres, and rather funny handling. I’m pretty sure (go-) karts have steering geometry that does not apply Ackermann steering geometry (because they’ve got a short wheelbase and wide track) and they seem to hop round some tight corners (or is that because they don’t have a diff?)

Answer 4

If the Ackerman principle didn't exist, there would be, of course, less wear, especially on the steering tires. But it does, therefore your question doesn't make much sense. What are you really asking here?

http://www.auto-ware.com/setup/ack_rac.htm

Answer 5

Severe scrubbing on the inside tires.
A loss of steering control at any speed that caused the inside tire to lose traction.

Answer 6

Tyre wear and heavy steering.

Answer 7

Excessive wear. It would also cause unpredictable turning as one wheel fought the other.