A tuyau (French for 'pipe') is an ancient invention for producing cool, dry compressed air from a flow of water. It is a remarkable device because it can produce almost any degree of compression and has no moving parts or seals to wear.
A pipe is constructed. One end of the pipe points up stream, to capture a flow of water. As the water enters the pipe, nozzles entrain bubbles in the water. The pipe then goes down. As the pressure increases, the air in the bubbles is compressed. The bubbles shrink. At the bottom, the pipe turns up a bit to a plenum. It then flows sideways. The compressed bubbles rise to the plenum and pop. The pipe then turns down, emptied of air bubbles. It conveys the spent water back up to the surface to discharge the water.
A small pipe from the plenum can be used to direct the compressed air to any use.
Reportedly, tuyaus were used in place of bellows to feed Romaniron-working forges. Often the same forges had hammers powered by water-works.
Un tuyau pour fils électriques est l'idéal mais vous pouvez également prendre un tuyau d'eau en plastique noir ou un tuyau d'essence en plastique.
Pour fixer l'autre bout du tuyau au bec de l'arrosoir, vous devrez peut-être mettre un petit morceau de reste de tuyau d'arrosage à l'extrémité du bec d'arrosoir pour que la baguette tienne solidement.
Si vous avez un tuyau d'arrosage pour amener l'eau sur votre pépinière, la même baguette d'arrosage peut être fixée sur son extrémité.
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