Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
130 THE SUBMARINE TORPEDO BOAT
mover to be used for surface propulsion can be made to
furnish the power for submerged work as well, thus doing
away with the present storage battery system and its
inherent dangers and limitations.
The problem has been attacked by many in the last
few years, notably among them an Italian engineer by
the name of del Proposto, and a Spanish engineer named
d’Quevilley.
The del Proposto proposition is essentially an air propo-
sition, using the internal combustion engine to propel the
boat and to drive an air compressor for storing up air in
tanks when on the surface. In the submerged condition
the mechanical energy of the stored air is used back
through the compressor and through all or part of the
cylinders of the internal combustion engine, as air motors
for the propelling power. It is understood that del Pro-
posto built a boat and had his system installed. But
little is known of the results obtained and it is believed
that the performance of the equipment did not come up
to his expectations. His troubles would evidently be
mechanical difficulties resulting in inefficiency.
The d’Quevilley proposition is that of a soda-boiler,
using the steam generated from a process of slaking
caustic soda. When the vessel is about to submerge, the
exhaust steam from the engines is turned into this soda-
boiler, producing a secondary steam caused by the action
of the soda in absorbing the water vapor. The heat
evolved by this action forms a secondary steam which is
used through the engines and the cycle continues. This
process goes on until the caustic soda has become satu-
rated, when the vessel must return to the surface and the
soda reconcentrated.