Some Striking Continental and American Monsters
NARROW GAUGE (30 INCHES) 2-
WHEN the Servian Government decided to introduce the Mallet locomotive upon its system, and forthwith called for tenders, the conditions which had to be fulfilled were somewhat exacting. The engines were required for both passenger and heavy goods service upon the line traversing the difficult mountainous country, abounding in heavy grades and sharp curves, between the town of Paratschin and Saitschar, near the Bulgarian border.
The gauge is 760 millimetres -
firm of A. Borsig, of Tegel, secured the contract.
The engine is six-
The boiler, for brown coal fuel, is of ample proportions. The tubes measure 13 feet 1½ inches between tube plates, and have an internal diameter of 1 9/16 inches. The grate extends over the frames and wheels, and has a width of 41⅝ inches and a length of 71 inches. Owing to the position of the boiler above the rail level an inclined grate and a special furnace arch were necessary.
This firm of locomotive builders also constructed an interesting and powerful locomotive for the Sand Railway Company of Gleiwitz. There are four collieries in Upper Silesia which are supplied by the above firm with sand, which has to be trans-
The conditions called for a locomotive with a flexible, and not a fixed, wheel-
In order to conform with the admissible service weight of 96·5 tons, a boiler of very high capacity has been provided. There are 148 boiler tubes and 24 superheater tubes disposed in three rows, and a specially large fire-
The diameter and stroke of the cylinder are 25¼ inches. The driving wheels are 49¼ inches in diameter. The fixed wheel base is 9 feet 6 inches, and the total wheel base 27 feet 6 inches. Steam is used at 180 pounds per square inch. There is capacity for 12 tons of water and 2½ tons of coal.
An unusual expression of the Mallet locomotive is that engaged in the freight service of the Atchison, Topeka, and Santa Fe Railway. In this instance, not only is each set of drivers carried in an individual frame, the two being hinged together, but the boiler itself is flexible, being made in two sections united by a hinge or “accordion” joint, so-
This locomotive was built at the Philadelphia shops of the Baldwin Locomotive Company. The high-
The engine is of the 2-
The fastest trains of the Chemin de Fer du Nord of France are handled by powerful Baltics -
The long boiler barrel has a diameter of 74¾ inches. The total heating surface is 4,394·93 square feet, of which the super-
Ready for the road the engine weighs 102 tons, of which 54 tons are disposed over the drivers, and available for adhesion. The tender is of the Nord standard eight-
With these engines a train weighing 400 tons is able to attain a speed of 75 miles upon the level, some 2,000 horsepower being developed in the cylinders. On grades rising 1 in 200 a speed of 60 miles per hour is sustained.
In running order the engine weighs 96·5 tons.
[From Part 24 of Railway Wonders of the World by Frederick A. Talbot, 1913]