Ackermann steering geometry
Overview
 
Ackermann steering geometry is a geometric arrangement of linkages in the steering
Steering
Steering is the term applied to the collection of components, linkages, etc. which will allow a vessel or vehicle to follow the desired course...

 of a car
Automobile
An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...

 or other vehicle
Vehicle
A vehicle is a device that is designed or used to transport people or cargo. Most often vehicles are manufactured, such as bicycles, cars, motorcycles, trains, ships, boats, and aircraft....

 designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radius
Radius
In classical geometry, a radius of a circle or sphere is any line segment from its center to its perimeter. By extension, the radius of a circle or sphere is the length of any such segment, which is half the diameter. If the object does not have an obvious center, the term may refer to its...

. It was invented by the German Carriage Builder Georg Lankensperger in Munich in 1817, then patented by his agent in England, Rudolph Ackermann
Rudolph Ackermann
Rudolph Ackermann was an Anglo-German bookseller, inventor, lithographer, publisher and businessman.- Biography :...

 (1764–1834) in 1818 for horse drawn carriages.
 
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