. American engineer and railroad journal . locomotives as compared with the previous design: NEW VALVE STEM CROSSHEAD AND GUIDE. GENERAL DATA. Previous design Fuel Bit. Coal Tractive effort 29,800 lbs. * American Engineer, Jan., 1908, page 16. Latest design Bit. Coal 30,900 lbs. 133 134 AMERICAN ENGINEER AND RAILROAD JOURNAL. April, 1911. Weight in working order 266,000 lbs. Weight on drivers 170,500 lbs. Wt. of engine and tender in working order. ..481,000 lbs. Wheel base, driving 14 ft. Wheel base, total 36 ft. 6 in. Wheel base, engine and tender 67 ft. 11 in. RATIOS. Weight on drivers -r- t
. American engineer and railroad journal . locomotives as compared with the previous design: NEW VALVE STEM CROSSHEAD AND GUIDE. GENERAL DATA. Previous design Fuel Bit. Coal Tractive effort 29,800 lbs. * American Engineer, Jan., 1908, page 16. Latest design Bit. Coal 30,900 lbs. 133 134 AMERICAN ENGINEER AND RAILROAD JOURNAL. April, 1911. Weight in working order 266,000 lbs. Weight on drivers 170,500 lbs. Wt. of engine and tender in working order. ..481,000 lbs. Wheel base, driving 14 ft. Wheel base, total 36 ft. 6 in. Wheel base, engine and tender 67 ft. 11 in. RATIOS. Weight on drivers -r- tractive effort Total weight ■- tractive effort Tractive effort X diam. drivers -i- heating surface. . Total heating surface -=- grate area Firebox heating surface ~t- total heating surface, %.. on drivers ~ total heating surface 269,000 lbs. 171,500 lbs. 424,000 lbs. 14 ft. 88 ft 6 in. 67 ft 11 in. * * * * THREE YEARS TESTS OF FEED WATER HEATING BYTHE TREVITHICK SYSTEM. I TSTEAM PIPES ON SUPERHEATER LOCOMOTIVE. Total weight -^ total heating surface Volume both cylinders, cu. ft ,,o nJ. Total heating surface -r vol. cylinders * V?2 j «o Grate area -^ vol. cylinders CYLINDERS. Kind Simple Simple Diameter and stroke 22 x 28 23>^ x 26 VALVES. Kind Piston Piston Diameter ...... 1* !• jn- Greatest travel 6 in. 7 in. Outside lap 1 !• IH in. Inside clearance A !■ A !• Lead in full gear A ■. A in. WHEELS. Driving, diameter over tires 79 in. 79 in. Driving, thickness of tires 3 /S in. S!4 in. Driving journals, main, diam. and 10 J^ x 12 in. 10!4 x 12 m. Engine truck wheels, diameter 36 in. 36 in. Engine truck, journals 6J^ x 12 in. 6J4 x 18 in. Trailing truck wheels, diameter 5054 in. 50J4 in-Trailing truck, journals 8 x 14 in. 8 x 14 in. BOILER. Style Conical Conical Working pressure 200 lbs. 200 lbs. Outside diameter of first ring 72 in. 72 in. Firebox, width and le
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