Some Continental and American Mammoths Compared
DECAPOD BUILT FOR THE ARGENTINE GREAT WESTERN RAILWAY
The line is of 5 feet 6 inches gauge. In working order this locomotive weighs 135 tons complete.
WHILE possibly the railways of these islands may not be able to produce many locomotives of huge dimensions, comp-
These engines are of the 2-
The total weight of the engine is 79 tons 12 cwt, in running order, of which aggregate 71 tons 6 cwt are available for adhesion, bringing the maximum load upon each of the five driving axles to 14 tons 11 cwts. The tender, carried upon two four-
This locomotive is capable of attaining 74½ miles an hour in service.
The expresses of the Paris, Lyons, and Mediterranean system are well known, and in the working of this traffic several vary-
ing Pacific (4-
POWERFUL ARTICULATED (2-
The engine weighs 87½ tons and can draw a train of 1,500 tons at a speed of 20 miles per hour round curves of 315 feet radius.
This same firm of German locomotive builders also has built lately an interesting double compound articulated Mallet for the Brazil Railway Company. This South American line is of the metre (3·28 feet) gauge, and notwithstanding the narrow gauge this engine is extremely powerful. Its object is not high speed, but rather the hauling of very heavy loads over a tortuous track abounding in stiff banks and very sharp curves.
The locomotive is of the 2-
There are 194 boiler tubes of 2¼ inches external diameter. The boiler has a length of 21 feet between tube plates and a diameter, in centre, of 4 feet 11¾ inches. The boiler tubes have a heating surface of 2,371·3 square feet, while that of the firebox is 154 square feet, the total heating surface thus being 2,525·3 square feet. The grate area is of 42 square feet. The working pressure of the steam is 200 pounds per square inch. The length of the engine frame, including cow-
THE MASSIVE BALDWIN (2-
This locomotive complete for the road weighs 281 American tons.
Increasing heavy traffic compelled the Chicago, Burlington, and Quincy Railroad to seek for more powerful locomotive effort to handle its heavy goods traffic, and, without embracing the Mallet system, this end has been fulfilled by the Baldwin
Locomotive Company of Philadelphia. This firm supplied a 2-
The total weight imposed upon the driving wheels is 150·9 tons, the complete weight of the engine being 189·35 tons.
The tender, of the two 4-
While the Pennsylvania Railroad Company has overhauled its system completely, eliminating all severe curvature and heavy banks, yet its freight traffic taxes the resources of the operating department to a supreme degree. The fact that the system penetrates the heart of the Pennsylvania coal territory and serves the steel country affords some idea of the volume of the freight business which has to be handled. For the heaviest traffic of this character the railway has introduced some mammoth Mallet locomotives which, complete in running order, weigh no less than 334·45 tons.
THE MAMMOTH MALLET ARTICULATED SIMPLE (2-
This engine has 56-
These engines are of the 2-
The length of the driving-
The Italian State Railways embrace some very heavy stretches of track, with severe gradients, particularly among the Apennines and the Alps. The goods traffic over these lines is somewhat heavy, and in order to cope with this movement the Societa Anomina Officine Meccaniche of Milan have built a powerful type of compound goods locomotive, the distinctive feature of which is the detachable tender. The first engine of this character was introduced upon the Italian State system about 1907 for working the passenger trains over the stiff Apennines section of the Rome-
A NOVEL TYPE OF TEN-
This engine was designed expressly for mountain service among the Alps and Apennines, where continuous grades of 1 in 38·4 and 1 in 40 are encountered. The tender, carrying water only, and a brake compartment, can be attached either to the front or rear of the engine as desired. The coal bunker of 4 tons capacity is mounted on top of the boiler forward of the cab.
The detachable tender was adopted because of the economies it offered in working. When running forwards the tender is in the conventional position, but instead of turning the engine round preparatory to the return trip, the tender is shunted and coupled to the chimney-
feature of this type of locomotive is the incorporation of a guard’s compartment with the tender, so that it is not necessary to have a brake van next to the engine when operating goods trains.
The engine is a four-
The engines of this unusual type are restricted to the trying mountain division, and are among the most powerful in service upon the Italian State Railways. They have given complete satisfaction, not only on account of their hauling capacity but from their economical operation as well. They are able to haul a load of 270 tons, exclusive of the locomotive, up the 16 miles of the maximum grades at 20 miles an hour.
[From Part 15 of Railway Wonders of the World by Frederick A. Talbot, 1913]