Fig. 2.
At the commencement of this chapter is a [drawing] of the model we are about to build in its finished condition, and [Fig. 2] is a side view of the same, of which A is the boiler, B the chimney, C a screw head to fill boiler with water, D the steam chest with safety valve on top, E the whistle, F the steam tap to start the engine with, HH are the leading and trailing wheels, and I the driving ditto, K the cylinders, L the frame, M the buffers, N a set thumb-screw to fasten a tender on by, O is the lamp, and P is a small tap, used to ascertain the quantity of water in the boiler. The handrails R and S complete it; and I think this is sufficiently clear for you to perfectly understand the general working arrangements of the model.
Locomotives, whether real or only model ones, can all be divided into three principal parts, viz., the carriage or framework, the engine or cylinders and parts connected with them, and the boiler, and we will now proceed to make each part in turn, beginning with the framework.
Fig. 3.
First take a sheet of brass for the bed-plate, about one-sixteenth of an inch thick, and cut it to an oblong shape, four inches wide by fourteen inches long, as in [Fig. 3], and be very careful that the corners are right angles. This is to be hammered out quite flat and filed up smooth, and finished with emery cloth held round a flat piece of wood; you must also cut a hole in it for the boiler to rest in as at C, beginning half an inch from B and making the hole eleven inches long by one inch and a half wide, taking care it is quite central on the line AB, or you would get your engine lopsided, and you must take the same care in setting the chimney, steam dome, etc., as when not exactly central it gives a bad unsightly look to an otherwise well-finished model.
Fig. 4.
