# turning circle

Also found in: Dictionary, Wikipedia.

## turning circle

the smallest circle in which a vehicle can turn

## Turning Circle

(in Russian, tsirkuliatsiia sudna), the path of the center of gravity of a ship when the ship’s rudder is turned through some angle and held in that position. The Russian term tsirkuliatsiia sudna is also frequently applied to the process of turning a ship.

The turning of a ship consists of a maneuvering phase, an evolutionary phase, and a steady-state phase. The maneuvering

Figure 1. The turning path of a ship and the main parameters of the ship’s turning circle

phase coincides with the time interval during which the rudder is swung. The evolutionary phase lasts from the moment the rudder is held at a constant angle to the moment the elements of the ship’s motion cease changing with time. During the first two phases, the path of the ship’s center of gravity is a line of varying curvature; during the steady-state phase, the path is a circle (Figure 1).

The elements of a turning circle are the steady-turning diameter D, the tactical diameter DT, the advance l1, the transfer l2, and the offset l3. The determination of these elements is an important step in the evaluation of a ship’s maneuverability. The course of a ship cannot be plotted, especially during maneuvers, if the elements of the turning circle are not known. An element of a turning circle is determined by computation and is checked during sea trials.

### REFERENCES

Fediaevskii, K. K., and G. V. Sobolev. Upravliaemost’ korablia. Leningrad, 1963.
Voitkunskii, la. I., R. la. Pershits, and I. A. Titov. Spravochnik poteorii korablia: Sudovye dvizhiteli i upravliaemost’, 2nd ed. Leningrad, 1973.

IU. G. DROBYSHEV

## turning circle

[′tərn·iŋ ‚sər·kəl]
The path approximating a circle of 360° or more described by the pivot point of the ship as it makes a turn.
Mentioned in ?
References in periodicals archive ?
The main benefit of the Twingo's arrangement is the extra space available inside and the amazing turning circle - as the front wheels can turn through 45 degrees.
Armed with these facts and knowledge of the part of the turning circle you will apply to the situation at hand, you can now envision solutions to the circling problem.
For the handyman flitting around the suburbs and commercial complexes the Nissan is near ideal with its raised seating position, tight turning circle, light steering and sensible access.
Just for the fun of it Googling a runner Turning Circle 4.
If the bus driver can't get down to the bottom of the road (into Llandegla) to turn round in the turning circle, they have to reverse all the way back.
According to the expert, a driver simply has to gauge the radius of his/her car's turning circle and the distance between the vehicle's front and back wheels.
The H3 V8's other best in-class off-road features include the steepest approach and departure angles, tightest turning circle and lowest idle speed gearing, a statement said.
The Yale VT and VF Series offer a number of 'firsts' for the industry, including a four wheel truck with the smallest turning circle in each capacity, the best combination of lift and travel speeds for high productivity and the most efficient energy consumption over the VDI test cycle.
It has been designed to include a battery that, despite being lead-acid, would provide greater capacity (up to 55kW) while still maintaining the minimum overall dimensions of traditional tractors and possibly improving the turning circle.
Mustang's all-wheel-steering allows for the entire machine to turn as one unit, thus maintaining its center of gravity throughout the turning circle, allowing turns with a full load.
The car feels quite nimble for such a big beast and boasts a turning circle that would not embarrass a taxi.

Site: Follow: Share:
Open / Close