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Gustave Zédé's Gymnote.

From: <Skravitz~at~aol.com>
Date: Sat, 15 Jul 2000 07:15:50 EDT
To: jvf~at~math.technion.ac.il

>From Encyclopædia Britannica (1944) v21 p492:
In France, the "Gymnote," the first naval submarine, was ordered in 1886 and
launched in 1888. Originally prepared by Dupuy de Lome, the design was
modified by Gustave Zédé, who was placed in charge of its construction. She
was of 30 tons displacement, fitted with a screw propeller driven by an
electric motor supplied with current from secondary cells. The trials being
satisfactory, the "Gustave Zédé" of 270 tons, similarly propelled, was
ordered in 1890 and launched in 1893.....
     In order to submerge a submarine several tanks designated "main ballast
tanks" are completely flooded and a less number of smaller tanks are partly
flooded. As these tanks when filled bring the vessel from the surface to the
submerged condition, their total volume is the reserve of buoyancy of the
submarine when on the surface, and is a measure of her seaworthiness.
Submarines are either "single hull" or "double hull."
     The "Gymnote," "Gustave Zédé" and "Holland" were of the first type
having a strong hull of circular section throughout, the centers of the
circles lying on a straight line, the axis of the submarine.
Received on Sat 15 Jul 2000 - 14:23:24 IDT

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