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The New Zealand Railways Magazine, Volume 5, Issue 1 (May 1, 1930)

New Features in Locomotive Design

New Features in Locomotive Design.

The locomotive forms the basis of railway haulage, and no matter how comfortable passenger carriages may be, or how efficiently the station staffs carry out their respective duties, it is useless to expect to attract the traveller if locomotives are not powerful enough to meet every demand that may be made upon them. Last month's Letter made reference to the efforts of the Home railways to increase locomotive efficiency and economy, and dealt in detail with the new high-pressure locomotive, No. 10,000, introduced on the London and North Eastern Railway system. Following the lead thus set, another wonderful high-pressure machine has been put into experimental service on the London, Midland and Scottish line.

The new L.M. and S. locomotive is appropriately named “Fury.” It follows the design of the well-known “Royal Scot” class as regards the frame, but is a three-cylinder compound, the high pressure cylinder being situated between the frames, and the two low pressure cylinders outside the frames. The boiler is of the “Schmidt” high-pressure type, and consists of two distinct systems of boilers, each carrying a different pressure, varying from 250lbs. to 900lbs. per square inch. High-pressure steam is generated in a drum separated from the normal boiler, and is first employed in the high-pressure cylinder of 11 1/2in. diameter at 900lbs., being then mixed with low-pressure steam from the boiler and used in the two low-pressure cylinders at 250lbs. The tractive effort of the machine is 33,200lbs., and the new locomotive is now undergoing extensive trials on the L.M. and S. Anglo-Scottish main line.