But don't loose your temper; it won't help the
sand any.
Now no doubt the reader wonders why I have said nothing about compound
engines. Well in the first place, it is not necessary to assist you in
your work, and if you can handle the single cylinder engine, you can
handle the compound.
The question as to the advantage of a compound engine is, or would be an
interesting one if we cared to discuss it.
The compound traction engine has come into use within the past few
years, and I am inclined to think more for sort of a novelty or talking
point rather than to produce a better engine. There is no question but
that there is a great advantage in the compound engine, for stationary
and marine engines.
In a compound engine the steam first enters the small or high pressure
cylinder and is then exhausted into the large or low pressure cylinder,
where the expansive force is all obtained.
Two cylinders are used because we can get better results from high
pressure in the use of two cylinders of different areas than by using
but one cylinder, or simple engine.
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