The Seattle post-intelligencer. [volume] (Seattle, Wash. Terr. [Wash.]) 1888-1914, 1895-10-03

means Of safety should the outer bottom
pe ruptured.
types and Dimensions.
ne SIX vessels will be OF two radically
1 - shS types One type wiu carry fun
80 p0Ner and be propelled by single
s~4@". Ahe other type will have eteadv-
Lns san only. and he propelled By twin
ginss.
ne principal dimensions OF the vessels
oL &he single screw type are. Length On
tne 4oad water line. Us feet: extreme
Se1m az the water line. 8 fee: normal
oFaaSht 70 the bottom Of the keel. Z feet.
alsplacenent, normal, about 100 tons.
lilAl1ated horsepower. about so; estlnat-
ca speed, N knots, per hour Y The
principal dimensions Of The twin screw
type are; Length. ia feet. beam. "A feet.
ofaagnt, y feet; displacement, 100 tons
...1feated horsepower. so: estimated speed
l. Knots per hour. The armament viii be
iaentieal In both types Each vessel win
carry SIX four-inch, four six-pounders
and Two one-pourder gtIns,all Of the rapid
IRE character. The guns Will be disposed
IN this order: -Four four-incn Suns Will
De mounted IN two batteries. port and
starboard, on the gun deck aufdships
Ine TWO other four-inch guns will be
placed on the main deck. one al the bow
ana enc az the stern Each VII have
wide arc Of fire. The six-pounder guns
VIII be carried on the gun deck. two well
forward. one on either bow. and two
anidships between the four-inch guns. re-
specuVely IN the port and starboard bat
teries. The one-pounder guns viii be dis
posed where most advantageous On the
hammock berthing. For use IN the four
Inch guns each vessel will carry 800
rounds Of ammunition, for use IN the six
FOUNDER guns 2.oso rounds, and for use in
the one-pounder guns 100 rounds.
The normal coal supply Of the single
screw vessel will be 100 tons, with total
bunker capacity Of 2SS tons. The twin
screw boats viii have a normal coal sup
ply Of 40 tons: they will De able to carry
with bunkers completely filled 251 tons
the single-screw vessels will be lighted
by electricity. and provided with a steam
steerer and steam windlass. Space and
weight are allowed for these features in
the twin-screw boats.
The Engines.
When going under sail alone the engines
OF the single-screw vessels may be IN
coupled, thus allowing the shafting and
screw 10 revolve simply by the action of
the passing water. So slight will be the
retardlng influence Of the screw thus dis
engaged that there Is every reason TO ex-
peet a sailing speed fully equal 10 the pos
sibilities Of steam power. The engines In
each type are designed to develop the
same horsepower and induce the same
speed, twelve knots. differing only as re-
CARDS shafting. number of screws, and the
incidental division Of the motive power.
For the twin-screw gunbOats the engines
will be rights" and 'lefts." each in a
separate water-tight compartment. They
will be OF the usual vertical. direct acting.
triple expansion type, with high pres
sure cylinder. an intermediate pressure
cylinder and low pressure cylinder, of
II. isA and Is inches respectively. They
VIII have a common stroke of eighteen
inches. capable OF developing 500 horse
power. with 200 revolutions minute The
engines Of the singie-scrsw boats viii also
be triple expansion. with cylinders Of the
following diameters; l5i2 23ia and IS
inches. A common stroke OF thirty inches
Will develop similar horsepower. that is,
500. and produce 10 revolutions a minute.
Each boat VIII have two single-ended
Scotch boilers with two corrugated fur
naces, each three feet in diameter. Each
boiler VIII have diameter of log feet and
length OF 1872 feet. with 80 square feet of
CRATE surface and 80 feet OF heating sur
face. making total heating surface OF
$500 square feet. and a total CRATE surface
of Is square feet. They will have a mod
crate forced draught, induced by two
blowers for each boat applied directly
to the ashpit The boilers Will be placed
side by side in the same compartment.
with common freroom.
The Composite Type.
The essential reasons for the construc-
ton Of vessels OF the composite type are
that they are largely independent of dock
ing facilities, and economical in the use OF
fuel The exfoliation of the copper causes
the barnacles. grass and other marine
growth 10 be released just as soon as the
vessel is put in notion and the bottom
Is made comparatively clean. permitting
the boat 10 maintain her designed speed
with a minimum consumption of coal The
docking expenses. whether at home or
abroad. and the cost of fuel. are two i'm
portant questions Of naval economy. and
the new vessels are counted upon to min
imize expenses, while their activity. range
Of action and general efficiency are great
~ Increased. They are specially needed
for ascending the long, shallow rivers Of
China.
Service Built for.
The character Of the service for which
the gunhoats are particularly designed is
such that they may he exposed 10 musket-
~ fire. and the housing Of the principal
part Of the battery by an unhroken deck.
besides adding materially 20 the stiffness
and strength of the vessels, gives suitable
protection 10 the gun crews in action. The
necessarily exposed position Of the bow
and the stern guns Is justified only by
their arc OF fire and usefulness IN "a run
ming action. while for river service. for
which tho gunboats arc particularly we'll
fitted. the disposition OF the gundeck bat
terry is all that could be desired.
Gem drug store viii give You mare goods
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