|
|
|
|
The Boats of the
|
Propulsion Plan |
Diesel Engines |
|
The "Bragadin" class was powered by two Franco Tosi "K 6" six cylinder
diesel engines capable of producing 750 HP. These were four-stroke
motors with a primary crankshaft to which were connected the pistons; they
could not be reversed (they only rotated one way).
The engines were directly connected to a four-stage air compressor which
produced air at a pressure of 70 Kg/cm2 m (995.6 psi) and which was also
used (in reverse) to start the engines. |
|
|
On surface navigation,
the engines were connected to the primary axels via a clutch joint, while
the axels were connected to the propeller shafts by a geared joint. The
geared joints could be disconnected from the propeller shaft and connected
to the electric motors, thus turning them into dynamos for the production of
direct current. While submerged, the clutch joints were fully disengaged.
The two diesel engines received their supply of fresh air from an intake
place above deck within the cunning tower. The intake was protected by a
large valve, which, while the boat was submerged, was sealed. |
Electric Motors |
| On the "Bragadin" the two electric motors (double coaxial armature winding)
were produced by C.G.E. (Compagnia General Elettricitą, Milan) and capable
of producing up to 832 HP. |
|
| The motors on the "Bragadin" were powered by direct current and could be
supplied with 55, 110 or 220 volts. Each motor could be run at full speed
(416 HP) for one hour, at 416 HP for three hours and at 66 HP in continuous
motion. the "Bragadin" were only capable of navigating 7
miles at less than 7 knots. |
Batteries |
|
On the "Bragadin", there were two 60 cell storage batteries.,
and each cell was of the type 27 M.A.S. 825-5 produced by the SGIAE of
Melzo (near Milan) and weighed 750 kg (1653 lb) The total weight of all
cells was 84 tons (92.59 short tons)The batteries could deliver 4,750 amps
in one hour, 9,030 amps in ten (903 amps/hour), and 9,780 amps in twenty
hours (489 amps/hour). |
|
The batteries holds |
|
|
 |
||
|
|
||
| © 1996-2007 REGIAMARINA (TM) - Terms and Conditions | ||
