![]() These two methods are called wall-to-wall and curb-to-curb (US spelling), or alternatively kerb-to-kerb (UK spelling). There are two methods for measuring the vehicle turning diameter which will give slightly different results. the arc, or the circle's circumference in the case when the manoeuvre makes a complete turn. Turning circle is also sometimes used to refer to the path swept in the manoeuvre, i.e. refers to the "turning radius" of the same car as 10.82 metres (35.5 ft). For example, Motor Trend refers to a "curb-to-curb turning circle" of a 2008 Cadillac CTS as 10.82 metres (35.5 ft), but the terminology is not yet settled. The curb-to-curb turning radius, which considers the chassis and wheels only without body protrusions, can be expressed as a simplified function of the wheelbase, tire width, and steering angle: t u r n i n g r a d i u s = w h e e l b a s e sin ( s t e e r i n g a n g l e ) + t i r e w i d t h 2, about 6.28 times as big). Mathematically, the turning radius would be half of the turning diameter. If a marker pen was placed on the point of the vehicle furthest from the center of the turn, the diameter of the circle traced during the turn defines the value of that vehicle's turning diameter. one, two or even four wheels at the front capable of steering), the vehicle's turning diameter measures the minimum space needed to turn the vehicle around while the steering is set to its maximum displacement from the central 'straight ahead' position - i.e. On wheeled vehicles with the common type of front wheel steering (i.e. The terms ( radius, diameter, or circle) can have different meanings refer to the § Alternative nomenclature section.ĭefinition Diagram of turning vehicle. The term thus refers to a theoretical minimal circle in which for example an aeroplane, a ground vehicle or a watercraft can be turned around. The Oxford English Dictionary describes turning circle as "the smallest circle within which a ship, motor vehicle, etc., can be turned round completely". The turning radius (alternatively, turning diameter or turning circle) of a vehicle defines the minimum dimension (typically the radius or diameter, respectively) of available space required for that vehicle to make a semi-circular U-turn without skidding. A vehicle with a smaller turning diameter will be able to perform a sharper U-turn. ( Learn how and when to remove this template message)ĭiagram showing the path of a driver performing a U-turn. JSTOR ( April 2021) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. ![]() ![]() This article needs additional citations for verification. ![]()
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