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Turning radius

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protrusions, in which the vehicle can make a U-turn. The wall-to-wall turning circle is greater than the kerb-to-kerb measure for the same vehicle because of the front and rear body overhangs. One can find these two ways of measuring the turning circle used in auto specifications, for example, a van might be listed as having a turning circle (in meters) of 12.1 (C) / 12.4 (W).
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turning circle will show the straight-line distance from one side of the circle to the other, through the center. The name "curb-to-curb" indicates that a street would have to be this wide before this car can make a U-turn and not hit a street curb with a wheel. If you took the street curb and built
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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. either extreme left or right. If a marker pen was placed on the point of the vehicle furthest from the center of the turn, the diameter
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The kerb-to-kerb turning circle can be smaller than the turning circle as it refers to only a partial circle (~180°) with the vehicle alongside one kerb to start with. To perform a U turn in a forward direction only, the centre of the turn is not coincident with the centre of the road - thus a
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In practice, the values of turning diameter tend to be listed more frequently in vehicle specifications, so the term turning diameter will therefore be more correct in most cases. The turning diameter will always give a higher number for a given vehicle, and the turning diameter measurement is
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The wall-to-wall turning circle is the minimum distance between two walls, both of which exceed the height of the vehicle, in which the vehicle can make a U-turn. The kerb-to-kerb turning circle is the minimum distance between two raised curbs, both of which are lower than the lowest body
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is another term also sometimes used synonymously for the turning diameter. Some argue that turning circle is less ambiguous than turning radius, but "turning circle" may introduce its own ambiguities since the same circle can be defined by multiple measurements, including the radius
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New Zealand requires that road vehicles can perform a 360 degrees turn on a circle with a 25 metres (82 ft) diameter, measured wall-to-wall. The only part of the vehicle that may reach over this limitation are collapsible mirrors.
292:. The Oxford English Dictionary describes turning circle as "the smallest circle within which a ship, motor vehicle, etc., can be turned round completely". The term thus refers to a theoretical minimal circle in which for example an 968:
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. AutoChannel.com refers to the "turning radius" of the same car as 10.82 metres (35.5 ft).
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complete circle would not be possible (without driving onto the pavement to complete the manoeuvre). It also does not take into account that part of the vehicle that overhangs the wheels where as 'turning circle' does.
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Many conventionally steerable vehicles (only one axle with steerable wheels) can reverse the direction of travel in a space smaller than the stated turning radius by executing a specialized maneuver, such as a
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with an outer radius of 12.5 metres (41 ft) and an inner radius of 5.3 metres (17 ft), measured wall-to-wall. In addition, when entering this annulus, no part of the vehicle can overreach a
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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
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Technically, the minimum possible turning circle for a vehicle would be where it does not move either forwards or backwards while turning and simply
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There are two methods for measuring the vehicle turning diameter which will give slightly different results. These two methods are called
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which changes its heading at a rate of 3° per second, or 180° in one minute. In this case, the turning radius depends on the
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it higher, as high as the car, and tried to make a U-turn in the street, parts of the car (bumper) would hit the wall.
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by more than 80 centimetres (31 in); this tangent is drawn at the outer, 12.5 m limit of the annulus.
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of the circle traced during the turn defines the value of that vehicle's turning diameter. Mathematically, the
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usually preferred by automotive manufacturers. Such mixing of terms can lead to confusion among consumers.
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inverse rotation of their left and right wheel sets, effectively giving them "zero" turning radius.
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as they do not follow a circular path as they turn. In this case the vehicle is referred to as a "
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Other terms are sometimes used synonymously for turning diameter, which can lead to confusion.
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of a passenger car: The wall-to-wall turning circle is shown at the top and takes the vehicle
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Turning circle is also sometimes used to refer to the path swept in the manoeuvre, i.e. the
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Aircraft have a similar minimum turning circle concept, generally associated with a
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into consideration, while the curb-to-curb turning circle is shown at the bottom.
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will have a smaller turning radius than vehicles that steer wheels on one axle.
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turning circle denotes how far apart the two walls would have to be to allow a
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around their central axis by making all wheels steerable, such as certain
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Needs better sectioning, needs better examples, and clarity in prose.
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Road vehicles must be able to carry out a 360 degrees turn on an
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Turning diameter is sometimes used in everyday language as a
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have a "round" mode which allows them to spin around their
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has been used as equivalent and interchangeable with the
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or similar skid, or in a discontinuous motion such as a
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On wheeled vehicles with the common type of front wheel
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Turning radius of a vehicle depends on the vehicle type
682:{\displaystyle turning\ radius={\frac {v_{t}}{60\pi }}} 1220:
2017 Audi A4 - Audi Canada - Product Information Book
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Index

Turning circle
improve it
talk page
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cleanup
quality standards
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verification
improve this article
adding citations to reliable sources
"Turning radius"
news
newspapers
books
scholar
JSTOR
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U-turn
radius
diameter
U-turn
skidding
aeroplane
watercraft
§ Alternative nomenclature

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