The evening telegraph. [volume] (Philadelphia [Pa.]) 1864-1918, 1866-02-22
tno.,tin,led frotn nln .First .Pnne.1

TContinued from he First Pa0e.1
The total area of paddle surface IN one wheel,
taking the length of pair Of half paddles at 10
feet, was 800 square feet; and taking them at 8
feet in length, 2S8 square feet The inner edge
of all the paddles was at the same distance from
the centre-namely, 10 feet inches-which
made the mean distance of their edges IL feet
8 l-3 inches from the centre, or the mean diane
ter over the paddles "a feet TO 2-3 inches. With
the vessel at the draught of feet inches for
ward and aft, the mean deepest immersion of the
outer edge OF the paddles was feet inches.
THE BomBRs
The boilers of the WtnoosIt contain 200 square
feet of CRATE surface and 5036 square feet of
heatiIg surface, and have no means OF super
heating the steam. The boilers OF the Atg0nqlttn
contain l44 square leet OF CRATE surface and
267S square feet of heating surface, together
with 1872 square feet OF steam superheating sun
face in the tubes. lhe boilers of both vessels
have water tubes. In the Wino0ski they are
vertical and are arranged above the furnace,
according to Martins patent; and in the Ag0n-
Qat5n they are inclined and arranged in combna'
lion with the superheating tubes, according to
the patent OF Mr.. b. N. Dickerson, who designed
the entire machinery of that vessel
THE CYLINDERS.
Each vessel has one inclined and direct acting
engine. The cylinder of the Wtnooski Is 5s
incnes diameter, and its piston has a stroke of 8
feet 8 inches. The cylinder OF the Algonquin is
As inches diameter ard its piston has q stroke
OF 10 feet.
SPACE OCCUPIED BY MACHINERY AND COAL
BUNKERs.
The space occupied in the W5R0oshi by the
machinery and coal IS 81 feet IL inches long by
the entire breadth and depth OF tue vessel; aud
in TINS space there is a coal bunker capacity OF
9424 cubic feet The space occupied In the
AtdOpQuin by the machinery and coal IS rs feet 3
inches long, by the entire breadth and depth of
the vessel and in this space there is a coal
bunker capacity OF 603l cubic feet.
WEIGHT OF MAcHNERY-FAULTY CONDITION OF
THE ALGONQUIN"
The weight Of the machinery of the Wtno0sti,
exclusive OF the water IN the boilers, is 54l, zig
pounds, and inclusive of the water, 62J,9lS
pounds. The weight OF the machinery in the
Algonquin, exclusive OF water in the boilers, is
629,l4 pounds, and Inclusive of the water,
70l, l4 pounds.
The distribution of the weight of the Algon-
q,lins machinery was so faulty that when the
vessel was fully slowed for sea, with her coal
bunkers filled, water in boilers, etc., she had
list OF % inches to port giving her port paddle
stan board wheel an immersion of 8 feet p
inches. To bring the vessel upright, there was
required weight OF 73 tons to be slowed on her
decks, in the extreme wing, after the hold had
been slowed, in such manner as to place all
the weight possible en- the starboard side.
SHE REQUIRES To BE CONTINUALLY TRIMMED.
This additional weight Of 70 tons required to
be continually trimmed as the coal was used
from the bunkers. OF course it added just that
number of useless tons to the vessels displace.
ment, and if it be added to the weight OF the
machinery, to which 1t is simply a counter
balance, it will swell that weight to 866,664
pounds.
DIMENsIoNs OF EACH VESSEL. ...
The following are the principal dimensions of
each vessel, the greatest transverse section, and
the displacement corresponding to their draught
OF water at the commencement of the trial.
Depth from lower edge of rabbet of keel to
mean load water line, feet 2k inches; length
on mean load water line IRON the forward side
OF the rabbet or stern TO the after side of the
rabbet of stern post, 240 feet; extreme breadth
on mean load water line, 35 feet; displacement,
l2907S tons; area Of greatest immersed trans
verse section. 263'85 square feet.
HOW THE DATA WERE KEPT DURING THE TRIAL.
On commencing the trial in Long Island
Sound, the vessels started abreast Execution
Rock Lighthouse, after having steamed from
the Brooklyn Navy Yard to that point. The ma
chinery Of the Algonquin was operated by four
engineers from the merchant service, employed
by the contractor for that purpose. The naval
engineers on board merely took the data of the
performance, but in nowlse intertered In the
management of the machinery.
During the time the machinery OF both vessels
was in operation a complete steam log was kept
OF their performance, III which was noted IN pro-
per columns, at the end OF each hour, the num-
ber on the counter the number OF revolutions
made by the engines per minute during the hour
the steam pressure in the boilers and in the main
Stpamplpe near the engine, tne NdCeuu III Vne
condenser and the position Of the throttle valve
the temperature OF the atmosphere on deck, or
the engine.room, of the tire-room, OF the inlec-
tion water of the discharge water, and OF the
hot well or feed water; also the height OF the
barometer in the engine-room.
An accurate account was kept OF the coal
thrown into the furnaces each hour, and Of the
refuse withdrawn from the furnaces and ashpits
at the end of each watch of four hours. AT the
end of every half hour an indicator diagram was
taken from each end of the cylinder, and the
complete data marked ON it at the time taken,
and of the number of revolutions OF the engine
per minute, steam pressure, vacuum, etc. A
naval engineer was always on watch in the fire.
room and engir GROOM of each vessel. In the
table hereunto appended will be found the totals
and means OF all the above quantities and the
calculated results thereirom.
THE CUTOFF.
The point at which the steam valve of the
WinOoSkt closed and cut of the admission of
steam to the cylinder, measured on the main
cross head guides was 6 feet inches from the
commencement OF the piston on the lower stroke,
and feet on the upper stroke The mean point
OF cutting off, therefore, was at seven'tenths of
the stl oke of the piston from the commence
ment. As the cutoff OF the Algonquin was not a
positive one, the point of cutting off was OBJ
tanned from the indicator diagrams, and Is the
mean given by them.
THE CONTRACT FOR THE MACHINERY OF THE
ALGONQUIN
The following are the guarantees of the con-
tract for the machinery OF the Algonquin, and it
was the object of the trial at the wharf and on
Long Island Sound to ascertain it they were f H.
filled, and, ii not, to what extent they we're
deficient.
First-That the material, workmanship, detail
and finish shall be first class.
Second-1hat the whole performance shall be
of such character as 10 demonstrate the salts.
factory strength, reliability, practical efficiency