Sunday, July 3, 2011

Driving School. Turns.

When cornering, the car appear and act on it centripetal and centrifugal forces. Centripetal force (the friction between the wheels and expensive) keeps the car at the side-slip, and the centrifugal (addicted to the car from the center of rotation) - on the contrary, causes side-slip (skid), and even overturn the car. If the magnitude of centrifugal force on rotation does not exceed the force of friction between the wheels and the road, the car, as they say, do not lose lateral stability, that is moving without skidding. Car skid, when the centrifugal force exceeds the centripetal. Magnitude of these forces is variable and depends on several factors - speed, turning radius, track width, center of gravity height, weight of the car. The main factor determining the magnitude of the centrifugal force is speed cornering. With increasing speed, the centrifugal force increases in a square, then there is an increase in the rate of twice the magnitude of the centrifugal force will increase by four times. Hence, the need to make turns at lower speeds, and the steeper the turn (less than its radius), the lower should be the speed. Before the sharp turn should include a second or third gear and rotate uniformly pressing the throttle pedal, no brake on the turn. Braking in a corner on the rear wheel drive car, especially in low-speed reduction may cause skidding the rear wheels. To bring a car from skidding, it is necessary to stop braking, quickly turn the steering wheel in the direction of the skid, and then as soon as the car is aligned, gently return the steering wheel to its original position. When turning wheels of the car describe arcs of different radius: front-wheel describe a large arc than the rear. Steep turns for the most part have to do at intersections of streets (roads) or lane change. Before you start to turn, need to signal a turn. Right turn is often performed on the edge of the curb or near the edge of the sidewalk. Making it, we should remember about the low ground clearance under the car body in the door. If you start turning as soon as the front wheels past the rounding of the sidewalk at the corner of intersecting streets, it will inevitably be dented body of the high edge of the sidewalk and the rear wheel ran into a curb. Turning the steering wheel must be only after the middle of the body as a car passed by rounding pavement. Rotations of large radius, which reproduces the curvature of streets and roads are made, usually without a significant reduction in the rate and do not represent the complexity, even for a novice driver. At such corners to watch out for only so as not to leave his range of motion. Departure from its range of motion possible in the commission of so-called double rotation. Feature tracks that turn in that direction is changed twice. Double rotation is overtaking transport around obstacles. Each double twist necessarily prevented by applying a signal turning first to the direction of the first bend, and then the second. Do not forget that the traffic regulations in certain cases, prohibited overtaking, turning right, turning left and turns. Scheduling one or another maneuver to remember about driving rules.

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