The throw

Stone

Speed 12.0 m/s

Throw angle 6° down

Attack angle α 20°

Spin Ω 40 rot/s

slow motion

Pick a stone and throw.

Speed and throw angle set where and how steeply the stone meets the water; α is the tilt of its face; spin only steadies it.

Easdale · World Stone Skimming Championships

Distance to where the stone sinks. Three skims per session. Valid only if it bounces at least twice. Back wall = 63 m.

Best valid skim: —

Judges count the skips on each of six stones; the most skips on any one throw wins.

Best throw: — skips · record 88 (Steiner, 2013)