The vortex is a piece of sports equipment used in the junior athletic categories (newcomers and young athletes) as a training tool for the javelin throw. It is made of a synthetic material (plastic and foam) and has a torpedo-shaped tail and a central body. On the sides there are holes thanks to which the passing air emits a whistle while it is in mid air. It weighs about 140 grams. It is generally made of soft moulded foam with semi-rigid wings and gives off sound effects as it is launched. The launch board is the same as for the javelin and the same rules for a good launch apply.

source: www.wikipedia.org/vortex

Tags: beach games, sand sports, team sport, vortex