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Archimedes Screw


The Archimedes Screw, Archimedean screw or screw pump, is a machine historically used for transferring water from a low-lying body of water into irrigation ditches.

It is one of several inventions and discoveries attributed to Archimedes though some researchers suggest that this style of mechanism may have been used earlier by Sennacherib, King of Assyria, in the 7th century BC.

Modern screw pumps, consisting of helices rotating in open inclined troughs, are effective for moving sewage in wastewater treatment plants where the open troughs, along with the design of the screws, permit the passage of debris without clogging.

They are also used to move grain, flour and powders in today's storage, production and transport systems.


The Archimedes Screw

The Greek writer Athenaeus of Naucratis describes how King Hieron II commissioned Archimedes to design a huge ship, the Syracusia, which could be used for luxury travel, carrying supplies, and as a naval warship.

It is claimed to have been the largest ship built in classical antiquity.

According to Athenaeus, it was capable of carrying 600 people and contained garden decorations, a gymnasium and a temple dedicated to the goddess Aphrodite.

Since a ship of this size would leak a considerable amount of water through the hull, the Archimedes' Screw was said to have been developed in order to remove the bilge water.



     

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