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Diagram showing the path of a driver performing a U-turn.A vehicle with a smaller turning diameter will be able to perform a sharper U-turn. The turning radius (alternatively, turning diameter or turning circle) of a vehicle defines the minimum dimension (typically the radius or diameter) of available space required for that vehicle to make a semi-circular U-turn without skidding.
A Mecanum wheel is an omnidirectional wheel design for a land-based vehicle to move in any direction. It is sometimes called the Swedish wheel or Ilon wheel after its inventor, Bengt Erland Ilon (1923–2008), [ 1 ] who conceived of the concept while working as an engineer with the Swedish company Mecanum AB, and patented it in the United ...
Ackermann geometry. The Ackermann steering geometry (also called Ackermann's steering trapezium) [1] 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.
Equivalent pitch radius is the radius of the pitch circle in a cross section of gear teeth in any plane other than a plane of rotation. It is properly the radius of curvature of the pitch surface in the given cross section. Examples of such sections are the transverse section of bevel gear teeth and the normal section of helical teeth.
A variant exists where the drive wheel is inside the driven wheel. While an external Geneva drive advances the driven wheel one step in less than 180° rotation of the drive wheel, so (assuming a constant-speed drive wheel) the stop is always longer than the motion, in an internal wheel the motion always requires more than 180° rotation of the ...
A different drive speed is caused by feeding torque, from a separate "steering" transmission, into one final drive or the other using a pair of clutches. Usually the steering input turns at a fixed ratio relative to the engine, which results in a different turn radius for each main transmission ratio.
A curb or curb-to-curb turning circle will show the distance traveled by the wheels. The wall or wall-to-wall turning circle will include an allowance for the width of the whole car, including the overhang of the bodywork. For example, a van may have been quoted as having a turning circle (in meters) of 12.1(C)/12.4(W).
The steering ratio is the ratio between the theoretical turning radius based on ideal tire behavior and the actual turning radius. [9] Values less than one, where the front wheel side slip is greater than the rear wheel side slip, are described as under-steering; equal to one as neutral steering; and greater than one as over-steering. Values ...