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 ?
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.
It's a shame for the fans, who turned out in huge numbers, but with the high risk of aquaplaning it was sensible not to take any risks until we felt the conditions allowed us to do meaningful running.
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.
I struggled with the car aquaplaning and the tyres shuddering as we couldn't get the temperatures high enough to make them work properly.
PC Bannister's car showed he'd been travelling at 122mph before slowing to 115mph when he hit the water and began aquaplaning.
In her youth Evelyn enjoyed skiing, boating, aquaplaning and hiking with friends and family.
The groundstaff spent their time aquaplaning across the drenched covers, the ballcrew huddled around the burger van and most members gathered in the clubhouse to drown their sorrows.
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.