Evening star., 1901-05-18

boat deck two small upper bridges are 10
Gated, on which is placed a portion Of the
secondary battery. The boats are handled
by four cranes, all operated by steam; the
engines for this purpose being located on
the working platforms Of the cranes. Each
crane can lift the heaviest boat that 1t
has to handle at the rate of forty feet per
minute. and can also be revolved by its
hofstlng engine at the rate Of a revolution
in one minute. ia.
Bllge keels. to: reduce rolling, are fitted
to the vessel experiments In recent years
in our own and foreign navies having dem
onstrated the great efficiency of these keels
In preventing excessive rolling. The for
ward bflge kee1s extend for a length of
about eighty y-seven feet, while those aft
have length Of about seventy-five feet
hydraulic gear is used In steering the
vessel, and can put the rudder from hard
aport to hard astarboard in twenty sec
onds, when the vessel Is moving at full
speed. The valves Of the gear are connect
ed by an electric telemoter with the con-
ming tower beside the mechanical connec-
tion with the pilot house =
The electricity both for lighting the YES
sci and operating the turrets and hoists
and minor purposes, is furnished by eight
thirty-two-kilowatt generating sets, all
having pressure Of eighty volts at the
terminals
There are four dynamo rooms. one on
each side Of the vessel. just forward Of
the boiler space, two generating sets being
ful searchlights, two OF which are placed
on the top OF the pilot house and two on
the mainmast above the upper BRIDGE will
give warning Of the approach of hostile
vessels and for night signaling the ship
carries two sets OF electric signaling ap-
paratus.
The normal coal supply is 1000 tons, and
the capacity Of the bunkers is 1000 tons
AS in other ships of this type, the ar
rangement Of the bunkers Is such as to
afford considerable incidental protection to
the machinery
The Ohio and her class are the first bat
tie ships Of the United States navy in
which water tube boilers were provided
Steam for the propelling machinery Is
supplied by watertube boilers of the Thor
nycroft type. placed in four water-tight
compartments.
There are three smoke pipes.
The PropeIling Power.
The two propellfng engines are rights and
lefts in separate water-tight compartments,
and are of the vertical inverted cylinder,
direct acting, triple-expansion type having
four cylinders. The diameters Of the CYL
inders are as follows: $50 inches high
pressure, SO inches intermediate pressure
and 63 inches tor two low-pressures by 4S
inches stroke.
The collective indicated horsepower of
the main engines, with their air and cir
culating, is about 5000 when the vessel Is
making a speed Of eighteen knots 1t should
be stated here that the Ohio ranks next to
the Georgia class Of battle ships in our
navy In regard to speed. The Georgia and
class which will have the greatest speed Of
any battle ship yet authorized by Congress
are designed to make nineteen knots.
A refrigerating room on the berth deck
forward furnishes cold storage. and the
ship is supplied with an ice machine of
the dense air type that can produce the
cooling effect Of two tons Of ice per day.
Only such wood material as was deemed
absolutely necessary is used In the con-
struction Of the vessel and all Of this, ex-
cept the armor backing, Is thoroughly fire.
proof
The windlass, which is Of the most mod
ern pattern. is operated by steam, and can
raise both the bower anchors at once It
is housed in an 1nclosure just forward of
the forward barbette.
There are four steam winches used for
hoisting coal and general deck purposes.
The construction Of the Ohio and her
class was authorized by Congress May 4,
1893, when the Spanish war demonstrated
the wisdom Of a much greater increase of
the navy. The keel was laid on April o.
1899. and the contract price of hull and
machinery is $2899, 600.
Her complement is thirty-f1ve officers and
511 men.