Two (2) double plunger pumps, 41/2-inches diameter, 8-inch
stroke. Area of each pump, 15.9043; cubic inches in each pump, 127.2344;
weight of engine and water, 7,320 pounds.
No. 33, built by the Clapp & Jones Manufacturing Company,
Hudson, N. Y. Clapp's patent pendant tube boiler, 35 inches diameter, containing
185 1/2 square feet of heating surface. Vertical engine, with two (2) steam
cylinders, 8 inches in diameter, 7-inch stroke; area of each steam cylinder,
50.2656. Two (2) double plunger pumps, 47/8 inches in diameter, and 7-inch
stroke. Area of each pump, 18.6655; cubic inches in each* pump, 130.6585;
weighs of engine with water, 7,459 pounds.
The arrangement for the test was the following: Each engine to lift water from the river; the lift, considering the change of tide, was an average of about seven (7) feet; the boilers furnished with Croton water from hydrant on the dock; each engine to force water through 200 feet Maltese Cross Combination Hose, and deliver a stream through 1 5-16 inch ring nozzle. The pipes were lashed to a stand at an angle of forty-five (45) degrees, and the ground staked off up to two hundred and fifty (250) feet. The pressures were taken at the engines and at the pipes every three (3) minutes by the following members of the Department, viz.: Assistant Foremen Shaw, Browning, Louis, Munger and Kruger, and Engineers Jewell, Jones and Brewer. Assistant Foreman Searles superintended the weighing and distribution of the fuel.
The engines were started at 6.40 A. M. to test the connections,
hose, pipe stand, etc., and at 7 o'clock A. M. the test began. After working
two hours it was found impossible to take the distance the water was thrown,
as the cross wind turned the streams off, and the water began to accumulate
to such an extent as to make it disagreeable for the workmen in
the Dock Department shed. All the engines were then shut off, and the pipes
placed at the string-piece at an elevation of about 60 degrees,
and the water thrown in the river. Once each hour a test trial on distance
was made for two minutes by attaching a second line to the engines and
turning the water into it and shutting off the one playing in the
river, but as the water was thrown against a cross wind the result was
not satisfactory, as the following will show:
The greatest distance for Engine No. 13............................
The greatest distance for Engine No. 20 ............................210 feet.
The greatest distance for Engine No. 33 ........................ ...215 feet.
Time and Causc of Engines Stopping
7:21 A. M.-Length of hose burst in line of Enginc No.
13; all stopped two minutes, length replaced. Betwecn 8 and 9 A.M., Engine
No. 20 stopped three times, of two minutes' duration each, to examine connections,
9 A. M.-All stopped eighteen minutes to change positions
of pipes from land to river.
10:55 A. M.-Engine No. 20 stopped three minutes to change
spring relief to screw valve in pump.
4P. M.-Engines Nos. 13 and 20 were disabled and witlltrawn
from the test. The cause of Engine No. 13 stopping was the water from the
jacket of the boiler could not be forced into the coil. On examination
made by Mr. Ahrens, at Repair Shops, on November 10th, he found a piece
of composition metal chipping, about 1/8inch diameter and 1/2 inch long,
curled in form, under, and holding the check valve off its seat,
between the circulator and the coil.
The cause of Engine No. 20 stopping was the leathers of the plunger of one of the pumps tore off, and on examination some of the pieces were found under the discharge valves; the other pump was in perfect condition. The piece of metal taken from the feed pipe of Enginc No. 13, and the torn Ieathcrs from plunger of pump of Engine No. 20, accompanied the report.
Engine No. 33 continued on the test until time was called at 7 o'clock P.M.