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Simple steering issue

Simple steering issue

Simple steering issue

(OP)
We are manufacturing a three wheeled orthopedic scooter. As it stands, steering test show the inner wheel (on a left or right hand turn) turning in to a lesser degree then the outer wheel. What is causing this? Our tie rod mounts are not welded directly under or above the king pins. They are offset closer to the wheels. Could this impact the angle at which the wheels turn in? Changing the toe will aleviate this to a degree, but it also reduces turning radius to a large degree. Any help would be greatly appreaciated.

RE: Simple steering issue

Google Ackermann steer

RE: Simple steering issue

100% Ackerman will give you the lowest steering effort for a given turning circle, at low speed. If you can afford to increase steering efforts then making the wheels more parallel will improve the turning circle.

What you have is negative Ackerman, which is occasionally used, if the alternative is worse.

Cheers

Greg Locock

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RE: Simple steering issue


For vehicles that slide, such as in the dirt, it's often  referred to as reverse Ackerman. It will do as you describe when going slow, but turns things around when you start turning right to go left.

 

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