. Factory and industrial management. ngement, and although the first two of the new series had no con-necting side rods, these were applied very shortly afterward in orderto compensate the tangential efforts on the cranks, to insure prompti-tude of starting in all positions of the pistons, to diminish the maximumvertical oscillations, and to maintain the two sets of crank pins alwaysat the same relative angle. In the new compounds it was moreoverarranged to exhaust the high-pressure cylinders direct to the atmos-phere whenever necessity occurred, and at the same time to send livesteam direct t
. Factory and industrial management. ngement, and although the first two of the new series had no con-necting side rods, these were applied very shortly afterward in orderto compensate the tangential efforts on the cranks, to insure prompti-tude of starting in all positions of the pistons, to diminish the maximumvertical oscillations, and to maintain the two sets of crank pins alwaysat the same relative angle. In the new compounds it was moreoverarranged to exhaust the high-pressure cylinders direct to the atmos-phere whenever necessity occurred, and at the same time to send livesteam direct to the low-pressure cylinders. The boiler pressure wasaugmented—188 pounds—and compared with No. 701 the new engineindicated a power, during trials, of somewhat over 1,000 horse power,although having a grate area less than that of the old Outrance per cent, grades were now ascended with 200 tons at 47 milesper hour. One of these first two engines was sent to Chicago in 1893, LOCOMOTIVE CONSTRUCTION. 379. VAUCLAIN COMPOUND, STATE RAILWAY OF FRANCE. and the same type of compound was then adopted by the SouthernRailway of France. Later—in 1896—the succeeding classes hadboiler pressures raised to 201 pounds, the boilers were enlarged andfitted with Serves ribbed tubes, the grate area was increased, and theengine supplied with modern double-truck tenders; the speed up gradewith 200 tons was then augmented to 51 miles per hour. In March,1897, one of the new engines hauled a train of 225 metrical tons up agrade of per cent., at a speed of miles per hour, and withoutforcing the boiler to its utmost the work developed on the pistons was1,155 metrical horse power. In these trials certain abnormal fluctua-tions were noticed in the high-pressure valve-chest, as well as an unduecompression on the low-pressure pistons; these defects were remediedby increasing the size of the dry pipes and the capacity of the high-pressure valve-chests and by giving
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
