Baltimore Accepts Its New Engine.
Test of an Ahrens first-size engine was made at Baltimore a short time ago, and, according to the report of Chief Horton, the results were very satisfactory. The contract called for a first-size steamer, of not less than 1,000-gal. per minute, with special running gear and other features of construction peculiar to the service in that city. The engine throughout is Continental, but is designated the Baltimore type, because the design embodies so many ideas which have developed from time to time in the Baltimore fire department. The engine was tested at the city ground on pier 2 and the work done was at suction, water being draughted from the bay at about a 9-ft. lift. Under these conditions a new high record was established for double-pump engines, with 5%-in. diameter water-cylinders and 8-in. stroke. Briefly, the data covering the test is given thus: First—Size, Continental—Baltimore type.—General dimensions, 5Vz-in. x 9-in. x 8-in. stroke; double. Water supply, draughting from bay. 9-ft. lift; fuel, George’s creek coal, quality regularly used by the Baltimore city lire department; minimum steam pressure recorded, 125 lb.; maximum, 145 lb.; average steam pressure recorded. 135 lb.
Popping off at frequent intervals throughout tests.
All the nozzles, hose and equipment were furnished by the Baltimore fire department, and were the same as used at former tests of steamers.
Piezometer and pressure gauges were new and calibrated with U. S. Custom House standard gauges.
Readings were taken by the fire department officials.
Hose.—All tests through 4 leads, 50 ft. each, 2½-in. cotton, siamesed to a single outlet.
First Test.—1¾-⅛. smooth-bore nozzle—30 minutes; average pressure at nozzle, 130 lb.; gallons corresponding, 1,050.
Second Test.—2-in. smooth-bore nozzle, 30 minutes: average pressure at nozzle, 83 lb.; gallons corresponding, 1,080.
Maximum pressure observed at 2-in. nozzle, 125 lb.; gallons corresponding, 1,330.
Although mounted on rubber tires, the vibration of the steamer was not excessive; in fact, the apparent ease with which the work was accomplished caused much favorable comment.