Evening star. [volume] (Washington, D.C.) 1854-1972, 1890-08-30
that when not in use the propellers are free 10
reyolye.

| TeNOlNe
| ADVANTAGES CLAIMED.
The great advantage of this arrangement is
that it allows the machinery to be worked at
its maximum and most economical number of
revolutions at all rates of the vessels speed,
and each engine can always be used for pro-
| peiling the vessel. an advantage of great i'm
| portsnce and one that the arrangement. O. two
sets OF engines working on the same screw does
not possess
The steam pressure is 160 pounds. The en-
gine dimensions are as follows: Diameter of
high-pressure cylinder, AZ inches; diameter Of
ntermediate-pressure cylinder. SO inches;
diameter OF low-pressurs cylinder, 80 inches;
stroke (common), AZ inches.
The shafting Is made Of forged steel, 16. 5
incnes In diameter, with an axial hole IL inches
In diamster. Steel has been used wherever
possible, so as to make the machinery as light
as Is consistent with safety. The total capacity
OF the circulating pumps per minute when used
Tor bllge purposes is 40. 500 gallons.
Inc total indicated horse power developed
az ~ revolutions per minute and q forced
daught OF one inch of water is 2l.OOO There
are eight main doublo-ended boilers, placed In
four water-tight compartments. and two SINGLE
ended auxiliary boilers placed on the berth
deck. The alright iire-room system OF forced
draught Is used. Six of the double-ended
boilers are Is feet inches in diameter and Il
feet inches long. each having eight furnaces
and lI55 square feet Of CRATE surface and 5, 932
square feet of heating surface. Two OF the
doubls-ended boilers are IL feet inches IN
diameter and Is feetS5 inches long, each having
four furnaces and S4 feet of CRATE surface and
2.SI0 square feet of heating surface. The total
CRATE surface for the main boilers is 1221
square feet, and total heating surface 4l,3344
square feet.
Each auxiliary boiler is 10 feet diameter and
feet inches long, with two furnaces, and has
80 square feet of CRATE surface and 9i8 5 square
Ieet OF heating surface. The total CRATE surface
for auxiliary boilers il "a square feet and their
total heating surface 1877 square feet.
All the boilers are constructed of steel for
working pressure of loo pounds.
AN ARMoRED DECK.
The vital portions of the vessel are protected
by an armored deck inches thick on slopes
and % inches on the fat The space between
this deck and the gun deck will be infinitely
subdivided by coal bunkers and store rooms
In ADDITION to these coffer-dam feet in
width WILL be worked next to the ships side for
the whole length OF the vessel. In the bunkers
this Will be filled with patent substance,
forming wall 8 feet thick against machine
gun lire, which can also be utilized as fuel in
an emergency. Forward and abaft the coal
bunkers the coffer-daiu will be filled with some
water-excluding substance similar to wood
lite" In the wake of the four-inch aud ma
chime guns the ships side will be armored
with four and two inch plates. The six-inch
guns are mounted in the open, protected by
heavy shields attached to the gun carriages
The accommodations for officers and crew
are spacious, we'll ventilated and lighted All
the most approved modern appliances for ex-
hausting vitiated air and for incandescent
lighting by electricity have been incorporated
in the design.
The coal capacity is very large, reaching
1000 tons. At ten knots speed per hour this
Will give the vessel an endurance of 100 days.
a radius of action Of .6, $40 knots, or, in other
words, she will be able to steam around the
world IN l0s days without reooaling.
HER INNOCENT LooR
In appearance the vessel resembles closely
an ordinary merchantmen, the sides being
nearly clear of projections or sponsors which
ordinarily appear on vessels OF war. She will
nave two signal masts; will have no military
tops on them. however. The function of the
vessel 10 to destroy the commerce of an enemy
aud therefore her general appearance is such
as TO enable her to get within range before her
Character is discovered. As q whole this vessel
will represent the latest idea Of a powerful,
economical, protected commerce DESTROYER.
The hull will be Of steel, the v;als of the shin
and its stability well protected and the gun sta
lions shielded against machine guns The sub
division OF the hull Is such as to form a double
hull below the water, and offers as great se-
curlty against damage from torpedo attack as
Gun be given in vessel Of this class