Catapult

This is a simple catapult model built with some very common objects.

This weapon of war was used in Greek and Roman Antiquity as well as in the Middle Ages. It could launch heavy stone bolders through a system of spring and without explosives.

This project is a good way to introduce children to history and mechanics.

Cut the skewer with a pair of scissors to form 2 bars: 1 bar about 8cm long 1 bar about 10cm long (i.e. 2cm longer) With a hammer, push the smallest bar in one of the clothespins in the center of the spring (small metal circle). Do the ...Pinch the second bar with the clothespins already fixed to the first bar. The bar must fit in the small circle at the ...With the two other clothespins, pinch (on the narrow side) the two clothespins already fixed with bars. Check the ...Attach the clothespegs together with two small rubber bands.Pass the big rubber band around the clothes-pegs linked with bars, just above the top bar (where there is a slot for part ...Here is a side view to understand better where the locations of the various elements are.

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Date	06.09.2013
Auteur	webmaster
Organisme	webenergie
Traducteur	webmaster

Finalité	Produire un mouvement
Domaine	Mécanisme, rouages, engrenages

Langue(s)	français english
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