aquaplaning


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aquaplaning

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A condition that can exist when a high-speed aircraft lands on a water-covered runway. Water forms a fine film between the tires and the runway surface, rendering braking relatively ineffective and causing the aircraft to skid. An effective antiskid system can prevent aquaplaning. Runway grooving is the most effective method of preventing aquaplaning. When there is a thin film of oil, dirt, or rubber particles mixed with water that prevents tires from making positive contact with the pavement and makes braking ineffective, the phenomenon is called vicious hydroplaning. A thumb rule for determining minimum aquaplaning speed in knots is 8.6 × the square root of tire pressure in psi (lb/in2). The minimum full aquaplaning speed (where the entire tire is lifted off the runway) is 9 × the square root of tire pressure in psi. Where a stationary wheel lands on a flooded runway, the minimum full aquaplaning speed is 7.7 × the square root of the tire pressure in psi. Also called hydroplaning and dynamic hydroplaning.
References in periodicals archive ?
However, more than half of drivers stated they would react in a manner that would either make matters worse or have no effect on an aquaplaning car, such as pressing the brake to slow down.
There was so much aquaplaning on the back straight with some big puddles.
You are aquaplaning all the time, so you have to make sure you are in tune with your senses, more so than other times.
Hydroplaning or aquaplaning is associated with the complete loss of the grip of a tyre because of the presence of a water film between the tyres of a moving vehicle (an automobile, an airplane, etc.
But the cars weigh only 600-700kg, about half what a road car weighs, and are very low so with some standing water it is easy to start aquaplaning and then it becomes undriveable for us.
For example, water beads formed in front of a aquaplaning tire and lower tire-road friction on snow and ice could be detected, transmitting information to a driver or direct to engine systems.
Other possible causes are aquaplaning on the wet runway or a sudden tailwind that could have blown the aircraft further along the runway before it landed, but a spokesman for the Transportation Safety Board of Canada has said that wind shear is also unlikely to be a factor in the crash.
Four-time world champion Tommi Makinen retired after sliding into a wall after aquaplaning on the wet roads and damaging his suspension.
Without adequate tyre tread depth, your car may be unable to cope properly in wet conditions, causing problems such as longer stopping distances, loss of grip and even an increased risk of aquaplaning," explains Stuart Jackson, chairman, TyreSafe.
In the wet weather we can expect in the next few months this new tyre will be able to cut through standing water with added grip, accelerate water drainage at a faster rate and reduce the chance of aquaplaning due to the groove surfaces smoother shark skin surface design.
According to the snow tests, "the Conti cannot fail to impress with its precise reactions and high lateral stability," and the statement regarding testing in wet conditions affirms the following: "Conti's impeccable performance: extremely short braking distance, good aquaplaning properties, as well as precise and stable handling characteristics.
It is a success to this day Hamilton is unable to offer an answer as to why he was so masterful around the Northamptonshire circuit when all around him were spinning off or aquaplaning into trouble.