. American engineer and railroad journal . sted as follows:— A. Blast pipe 1 2J4 below horizontal center line of boiler; hood 1 II1. long. B. Blast pipe 1 2% below horizontal center line of boiler; hood 1 ol/2 long. C. Blast pipe 1 2J4 D. Blast pipe 0 2/, E. Blast pipe 0 9!4 long. On the first four tests the loads were the same, namely, 160tons behind the drawbar, but on test E the train hauled was 200tons. The same chimney was used on all trials, namely, 12V2inches diameter choke, tapered, and increasing inch per foottowards the top, length 2 feet 4I/4 inches. The blast-nozzle was4l4 inch
. American engineer and railroad journal . sted as follows:— A. Blast pipe 1 2J4 below horizontal center line of boiler; hood 1 II1. long. B. Blast pipe 1 2% below horizontal center line of boiler; hood 1 ol/2 long. C. Blast pipe 1 2J4 D. Blast pipe 0 2/, E. Blast pipe 0 9!4 long. On the first four tests the loads were the same, namely, 160tons behind the drawbar, but on test E the train hauled was 200tons. The same chimney was used on all trials, namely, 12V2inches diameter choke, tapered, and increasing inch per foottowards the top, length 2 feet 4I/4 inches. The blast-nozzle was4l4 inches diameter in all cases. The following table gives thesummary of results. The best conditions were obtained fromtest E arrangement, as regards the highest vacuum, and least below horizontal center line of boiler; without hood,below horizontal center line of boiler; without hood,below horizontal center line of boiler; hood 1 5J/2 Summary of Results. Average Vacuum -Inches, Water taken at top row of Tubes.• < bottom. RESULTS OF TEST- ON FRONT ENDS. < !EB, L909 AMERICAN ENGINEER AND RAILROAD [OURNAL. 109 variation in the intensity of draught at the top and bottom row to arrive at the best .teaming position of blast-pipe, diameter of of tubes. Test C was also very satisfactory, considering the low chimney, etc. vacuum maintained. This, however, is accounted for by the Smoke-Box Doors— These are much larger than ten years of the weather being calm on that occasion, enabling the They cannot be kept perfectly tight by the single crossbar andengine to be operated at an earlier cut-off, and with less de- central bolt arrangement, and a number of dogs pitched equallymaud on the boiler. round the periphery of the door is essential. The wear and tearResults of Experiments on .{-Cylinder Passenger Engine^- °f smoke-boxes has increased of late years, particularly thatThis engine when first put into service had a 5-inch diameter class with the sid I ned
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
