The morning call., 1892-01-18


sci 10 expedite the work, for their own
credit and that Of the yard, and that the
Secretary of the Navy may not be disap-
pOin ted in being able 10 build the vessel as
cheaply as she could have been contracted
for, and of this they should be informed.
An examination OF the high requirements
called for in the vessel Will show now great
an advance II was eXpected TO make in cur
naval construction. The Raleigh is twill
screw, protected steel cruiser having
length on load line of 800 feet, an extreme
breadth of ~ feet and mean draft OF Is
feet. Her displacement IS 1888 tons. The
aggregate Indicated HORSEPOWER OF her en-
gines is 10 be 10000. and this is tn give her
a Sreed Of 10 knots, while 1t is possible that
Il may be nearer 20.
There is a double bottom In the wake of
the machinery and a full system Of water
tight cOmpaTtu ents. The protective deck
las a double slope At the sides W tn thick
ness of steel two ami a half inches on the
amidships slopes, two inches on the end
slopes ard one inch on the fat. a Golfer
dam is provided at the water line, which
will be d!led with some water-eXcludlng
material. There is an open gun deck be-
tween the poop and fOrecaSte decks, ana
bridges close outside connect the two latter.
The engines are tTigie expansion, yertI-
cal inverted, and direct acting. with high
pressure CYL der So inches, an inter-
mediate 50 inches, and two low pressure 81
inches in diameter, the stroke being 50
inches Tie collective horsepower of
these and the smaller engines is 10000 at
164 revolutions. The COndenSers have each
1000 feet Of cooling surface. There are four
dOuble-ended and twO-Slt gle-euded boilers
in wateT-tiEht COMPARTMENTS. Two ot the
main boilers are i feet inches IN dame
ter and 20 feet 30 inches long. and The
other two are Il feet 6i2 inches by 20 feet
80 inches long. The two auxiliary boilers
are II feet inches IN diameter By feet p
inch in length. Tie working pressure Is
100 pounds. The t.tal heating surface is
1882 square feet, and the CRATE surface 5J7
square feet.
charges into a main duet under the fire.
room floor, and a branch leads TO each ash
plt wnIcE can be closed under the forced
draught. The normal coal supply is 400
tons, with q total bunker capacity Of J56
tons. At the maximum 81 eed Of 20 knots
tie full capacity would be burned in two
days and a half and 1913 knots would be
made But at Is knots when the horse
power would be only $3.50, her coal would
last five days, and she would cover 22l3
knots. At the speed of IS knots, with 1900
horsepower, size would consume y tons
a cay, and hence would have IA days sup
ply, which would give her radius OF 1864
knots. At speed OF "a knots she would
consume Az Tons per day, lasting l212 days
and making 4i90 knots At speed OF II
knots size would need but 26J2 tons per
day, ana in u days could cover 1925 knots.
At a speed Of 10 knots, 36 days at ljh tons
per day would give her a radius Of action
of 500 knots.
Turning now TO her armament, the main
battery Of the Raleigh Will consist Of one
G-inch rife ana ten 4-inch or else inch
rapid-frug guns. weighing about one AMI
half tons each, and the substitution OF
5-inch guns, which has since been rel Orted,
would require reduction II about fifteen
tons 10 the weights elsewhere in the ship.
TIE 6-inch gun is mounted on the fOrecaStle,
and the others are distributed IS shown IN
the illustration, all being on centre-plvut
mounts, protected by steel shleIdS' me
secondary battery will consist OF eight
6 FOUNDER and four 1-pounder rspid-fre
guns and two Gatliugs. There are also six
torpedo tubes, about four feet above the
water one fixed ia the bow, one IN the
stern and the other four which are train
ing tubes, are on each broadslde.
The Raleigh has the rig OF two-maSted
schooner, with 1910 square feet Of sail
About halfway uD her mssts are military
tops, and forward on tile topgsllant fore
castle is steel coming tower. She has
balanced ruddeT, formed in continuation
Of the after lines of the ship. The quarters
for officers and crew are believed to be COM
modious, and the Captains cabin is large
and we'll lighted and ventilated. The crew
have the forward berth deck, except the
space occupied by the paymaster's Office.
d ispeDsarv and prison.
The electric light plant has two engines
and two dynam0s OF adequate power. and
there are three seaTch-liRht prOje tors Of
the Mangin type. Ventilation is secured by
powerful blowers, and pipes from the upper
deck supply fresh air, while others carry
the gases Of the c0al-bunkeTs into the Chin
news. The system of drainage is very COM
plete and the steam pumps are supplemented
by hand-pumps ana can food the cOmparI-
ments or flush the drain p pes and are also
connected with the fireman..
While in all respects the Raleigh is up TO
the highest level in her class reached by
naval construction at the time she was
planned, her machinery marks more than
anything else the advance in this country
in ship-building As has been said, she has
displacement Of 1888 tons. 1t is expected
that with equal engine power and less dis
placement the Raleigh viii beat the fastest
of our new cruisers now In commission.
Taking together her speed and her bat
terry power, the Raleigh will constitute
most welcome addition TO our navy. and no
doubt will be completed in season to take
part in the great review OF 1893