Files, drills, taps, a hack saw, and a soldering
iron did all the rest of the work.
Solder plays so important a part in the assembling of the many pieces of
the engine that, if the machine fell into the fire, a rapid disintegration
would follow. But in actual use the engine has proved very satisfactory;
and if not such as the highly-skilled model-maker with a well-equipped
workshop at his command would prefer to expend his time on, it will afford
a useful lesson in the use of the simpler tools. Under 50 lbs. of steam it
develops sufficient power to run a small electric-lighting installation, or
to do other useful work on a moderate scale.
[Illustration: Fig. 53.--Elevation of a large horizontal engine.]
The principal dimensions of the engine are as follows:
Bedplate (sheet zinc), 13-1/2 inches long; 4-1/2 inches wide; 1/8 inch
thick.
Support of bedplate (1/20 inch zinc), 3 inches high from wooden base to
underside of bedplate.
Cylinder (mandrel-drawn brass tubing), 1-1/2 inches internal diameter;
2-13/16 inches long over all.
Piston, 1-1/2 inches diameter; 1/2 inch long.
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