The Hawaiian star. [volume] (Honolulu [Oahu]) 1893-1912, 1911-09-01


Moltke, which is que TOR commission
in September.
Turbines for Cruisers.
ShiI ping lllustrated The Fore River
Shipbuldng Company, of Quincy,
Mass, has Just shipped from their
works to the oficine meccaniche,
Naples, Italy, three of six Curtis tur-
bines constructed for the above men
toned cruisers. The turbines were
shipped at Quincy, per lighter, taken
to New York and transshipped on s.
S. Perugia, which sailed on July %
for Naples direct.
/ These turbines represent the very
highest development of marine en-.
gineering, the type of propulsive ma
. chinery for these vessels having been
given the most searching study by
the Italian naval authorities
Each vessel has three turbines, each
driving a single screw, one on the
center line of the ship and two at
the sides as in an ordinary screw
! type. The turbines at $50 revolutions
will develop 5000 horsepower each
and 22,5OO horsepower will give the
vessel a speed of Is knots.
The turbines are technically called
so in. 16 stage turbines, that is, the
! mean diameter of the rotating drum
being so inches, and the steam is ex-
panded sixteen times, from boiler TO
4 condenser. The turbines are extreme
ly simple in construction, no part is
in motion except the one main re-
volving shaft with its wheels and
buckets inside the casing. On the
shaft is series of wheels and a drum
carrying at the periphery rows of
i. buckets on which the steam impinges
as it passes through from boiler to
1 the condenser. Between each row
? of revolving buckets are stationary
guide buckets rigidly fixed to the in
/, terror of the casing for the purpose
of guiding and giving the proper Ii
+ rection to the steam before it i'm
pinges on the revolving blades. A
series of nozzles is disposed be-
tween the various stages with open
ings so designed as to control the
velocity and pressures of the steam
in its flow from stage to stage, in
: such manner that the entire energy
OF the steam is gradually utilized and
absorbed in turning effort as it passes
through the turbine from end to end
For reversing wheels are placed
with several rows of buckets and noz
zles formed exactly as those just de
scribed but with the angle of buckets
4 in the opposite direction all within
the same casing. These wheels arc
located at the exhaust end of the tur
bine and therefore when going ahead
simply revolve idly in vacuum. When
backing, steam is shut off from the
ahead end and turned into the astern
end passing through these reverse
buckets, reversing the motion, the
turbine turning in the opposite direc.
ton, and the ahead wheels and drum
revolving again idly in vacuum.
The thrust of the propeller is taken
directly by steam pressure on the end
of the drum itself, thus practically
eliminating all friction. There is a
thrust bearing formed directly on the
end of the turbine casing to take up
the inequalities of thrust, the entire
design resulting in one complete self
containing structure.
Each turbine when completed was
connected to the test boiler and con.
denscr, run and tested most satisfac,
Htorily in the shop before shipment.
The turbines were completely fitted
with valves, piping and fittings to1
operating, for drainage and Iubricat
ing, etc.
The total weight of each turbine is
100000 pounds, the outside dimen-
sions and p feet 6 inches long and 9
feet inches in width.
U. S Naval Hospital Tragedy.
In the Toxic court Of appeal, on the
Slst ult, Judgment was given by Judge
Aibara in the appeal of John e. At
y kins of the U. S. S. New Orleans. who
was sentenced by the Yokohama court
to five years penal servitude for the
manslaughter of J. L. Saunders. The
appeal was rejected, and the accused
was ordered to bear the costs of the
court
The appeal of ]. E. Atkins havine
II. been quashed, the prisoner was sen
back to the Negishi prison from Toxic
8 TO undergo his term of five years i'm
prisonment
Were Not Spies.