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Bilge pump

Pompa per sentine e valvola conica

In this drawing Leonardo presents a study of a pump, called "galley trumpet". It is designed to pump water out of bilges (the bottoms of boats) here symbolized by a basket. An associated drawing on a different sheet represents a conical valve. When the pump is operated, the valve lifts and opens allowing the water to travel upwards but not in the opposite direction.

Manuscript L, sheet 25 v. 1497-1502 - Manuscript E, sheet 76 r. 1513-1515


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