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How to deal with aquaplaning tyre

Как бороться с аквапланированием шинIt is a complete or partial loss of adhesion caused by the presence of a water layer.

Aquaplaning is the emergence of a hydrodynamic wedge in the contact patch of the tire. That is a complete or partial loss of adhesion caused by the presence of a water layer separating the tires of a moving car from the road. From the point of view of physics, the explanation is: when the wheel lands on the flooded surface in the contact zone increases water pressure, and when its value becomes greater than the pressure of the tire on the support surface, the tire POPs up.

Factors that affect the aquaplaning

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A great influence on the aquaplaning have the pattern and degree of wear of the tread. The straighter, wider, deeper and more grooves located on the tire, the faster and more water is removed from the area of tire contact with the road, and therefore better grip. Have smooth tires (like a slick), for example, the lift coefficient on a water wedge is two times higher than that of the tire pattern. That is why the “Rules of operation of tires” do not use tires, the depth of the grooves less than 1.6 mm.

A similar dependence is manifested in relation to the road surface. The larger the graininess of the asphalt, the faster and more water is squeezed out from the contact. The most dangerous from the point of view of the tendency for aquaplaning to be a smooth road surface. Especially in the corners.

The thickness of the water film is another factor affecting the occurrence of aquaplaning. The deeper the puddle the more the water, the harder it is to withdraw it all from the contact patch.

The factor that primarily can affect the driver, — driving speed of the vehicle. The higher the speed, the greater the likelihood that the wheels of your car turn into a jet ski.

Nokian tested, the results of which made the table of dependence of the contact patch of the tyre from tread wear and speed.

Как бороться с аквапланированием шин

When using used tires, the contact area between the tyre and the road is dramatically reduced in the case of increasing speed. The figure shows the size of the contact area of tires with different tread thickness in layer of water of 3 mm and a speed of 75 km/h the contact patch an old tire with tread of 1.6 mm is only 16% of the contact patch stands in the place of the car, and at speeds of 125 km/h and does 6%.

The technical condition of the suspension on the tendency of the vehicle hydroplaning, contrary to misconceptions, is not affected. Another thing — in the case of increased backlash in the steering or ball joints, if not adjusted the camber/toe and broken shock absorbers harder to control the car — it would be worse to react to the actions of the driver. While taking the car from skidding caused by aquaplaning, it will be harder. However, the physics of loss of contact between wheel and road from the state of suspension is not affected. Much more important is the weight of the car. The heavier car is easier to displace water from the contact patch. Including why the trucks are allowed to drive on tires with less than passenger cars, the tread depth is 1 mm.

Low tire pressure is another reason for the occurrence of aquaplaning. Research conducted by Michelin showed that the reduction of pressure in the tire of the car to 1.7 bar instead of 2.4 bar leads to the fact that at the speed of 100 km/h the tyre loses contact and POPs up fully.

What is aquaplaning?

If the steering wheel while driving suddenly became easy, and the rejection of his car doesn’t react, keeping straight, then the effect of aquaplaning had occurred.

What are the dangers of aquaplaning?

The driver loses control of the car, and this can lead to accidents. Usually the car starts to skid to the side of the slope of the road profile or to the side where the puddle is under the wheels were deeper. And then — the script malepornography.

How to avoid aquaplaning?

If during a trip you found the shower to avoid the risk of aquaplaning on the road only one way — significantly reducing the rate. Keep in mind that even with new tires from top manufacturers, with the thickness of the water layer on the asphalt in ten centimeters, the machine may lose contact with the road even at speeds up to 80 km/h.

To minimize the risk of aquaplaning, you should follow certain rules:

To prevent excessive tire wear. Traffic regulations require a minimum tread depth of 1.6 mm for summer tires for passenger cars and 4 mm for winter. But these indicators better not to bring. Many tires are available in wear indicators.

Regularly check the tire pressure and keep it normal. Manufacturer’s recommendations can be found in the operating instructions.

To go on a wet road at a moderate speed.

Avoid driving through deep puddles.

What to do when hydroplaning started?

Do not twist the wheel in different directions at large angles, it’s dangerous! The sudden recovery of traction turned at a large angle of the wheel can trigger a sharp withdrawal of the automobile aside. Try to maintain a straight line motion until, until you feel that the wheels gained traction, and only after this maneuver.

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