What is the definition of hydroplaning?

Answer 1

When driving on a wet road, it is possible for your tires to drive up onto a thin layer of water- usually driving at high speed, with slick tires. This interferes with steering; your tires have no grip on the road surface. Your car can slide (skid) and braking works poorly.

Hydroplaning can be caused by one of two things:

• A buildup of water in the form of a wave at the front of a vehicle is created by that vehicle's forwrad motion. When the vehicle catches up with the wave, it begins to ride up onto the top of the wave; this results in it being lifted away from the surface. It can be both a good thing and a bad thing: when it happens in boats, it means there is less of the hull contacting the water and less friction, so it is easier to go faster. However, on the road caused by wheels, for the same reason you have less friction and cannot brake as quickly nor do you have as much control (hence slower speeds are advised during the rain and snow).
• An aerofoil design can be attached underneath a boat. When moving through the water, the Coanda effect and Bernoulli's principle combine to create a lifting force on the foil, which then lifts the boat. This again results in less friction and means you can go even faster.