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Modeler's Handbook Shay The Lima Catalog No. S-4 1925 1983 FIRST edition printin
Modelers Handbook Shay The Lima Catalog No. S-4 1925
Copyright 1983 FIRST edition FIRST printing NOTICE the number written on the upper corner of the title page
30 pages
Soft Cover
THE designs illustrated and described in this catalogue comprise our standard Shay Geared Locomotives. To meet special conditions, our engineers will be glad to co-operate with customers in the production of designs to meet their special requirements. Our Engineering Department is ready at all times to furnish information, and to advise as to the most satisfactory designs for particular conditions.
Shay Geared Locomotives operate successfully under extraordinary conditions of track and grade. These engines are built in sizes ranging from Class 10, weighing approximately 13 tons, up to any size to meet customers' requirements. With the exception of Classes 13 and 18, which are two-cylinder engines, all standard Shay Locomotives are constructed with three cylinders. This gives an even torque and uniform exhaust which produces a constant draft.
The boilers are carefully designed, and provided with large steam space, so that they will operate satisfactorily on steep grades.
The frames are made of Standard I-beam sections, or of the girder type. The trucks are solidly built, and thoroughly braced.
Due to the fact that there is no counterbalance in the driving wheels, there is a total absence of dynamic augment, or what is commonly known as "hammerblow" on the rail, Because of this, the Shay Geared Locomotive operates on track too light for a direct engine of the same axle load. It is easy on the track and reduces very materially the cost of repairs and upkeep.
As shown by the accompanying illustrations, the wheels are driven by means of gears mounted on the driving shaft, which is applied to the right side of the engine. To compensate for curves, the driving shafts are of an ingenious design provided with universal couplings and slip joints. The whole construction accommodates itself very freely to curves and uneven track .
Another particularly desirable feature of the Shay, when operating on bad track, is the ease with which it can be replaced upon the rails. For ordinary derailment, when only one truck is off, the engine can be easily and quickly put back upon the track by its own power and the use of common wrecking frogs. It is unusual to require the assistance of another engine to help a Shay on to the track after derailment.
It has been demonstrated that a Shay Locomotive is so simple in construction and easy to operate that any man who has had experience in stationary plant work can learn very quickly to become a competent Shay engineer.
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