If you were signed in, you could rate this activity and add it to one of your lists.
Throwing flattened stones across the surface of the water.
Stone skipping is a pastime which involves throwing a stone with a flattened surface across a lake or other body of water in such a way that it bounces off the surface of the water. The object of the game is to see how many times a stone can be made to bounce before sinking.
Stone skipping can be just a casual challenge between family ands friends or competeing in larger competitions. Often, the game is even played by just one person who tries with each attempt to improve on their last throw. There are many larger competitions hosted each year in different parts fo the world.
Internationally, the pastime is also called stone skimming, stone skiting, and ducks and drakes in the UK; and stone skiffing in Ireland.
The North American Stone Skipping Association (NASSA), formed in 1989 and based in Driftwood, Texas, holds world championships each year. A similar event takes place every year in Easdale, Scotland.
The world record according to the "Guinness Book of Records" is 40 skips, set by Kurt Steiner at the Pennsylvania Qualifying Stone Skipping Tournament on September 14, 2002.
Research undertaken by a team led by French physicist Lydéric Bocquet has discovered that an angle of about 20° between the stone and the water's surface is optimal. Bocquet and his colleagues were surprised to discover that changes in speed and rotation did not change this fact.
Earlier research reported by Bocquet calculated that the world record of 38 rebounds required a speed of 12 m/s (25 mph), with a rotation of 14 revolutions per second.
The rules in formal competitions are:
1. The stone's diameter shall not exceed 3 inches at any point.
2. The stone must have been formed naturally.
3. The stone must bounce three times before sinking.
4. The stone that skims the farthest within the marked lane wins, irrespective of the number of bounces.
5. Each competitor gets five attempts, with the longest skim counting.
Flags: Very Short (0-60 mins), Short (1-3 hours), Solo, With a Friend, With a Group, Children, Teens, Adults, Outdoors, Morning, Day, Sunny