All About Engines
Forfatter: Edward Cressy
År: 1918
Forlag: Cassell and Company, LTD
Sted: London, New York, Toronto and Melbourne
Sider: 352
UDK: 621 1
With a coloured Frontispiece, and 182 halftone Illustrations and Diagrams.
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Power and Its Measurement 325
ships, and, in a few cases, there are large pumping
plants. While these cannot be tested by absorbing
the energy in an absorption dynamometer, their out-
put can, as we have just seen, be measured fairly easily.
Smaller engines, again, can be tested in another way.
Instead of absorbing the energy they yield, we can
measure the amount transmitted by what is known
as a transmission dynamometer. These are usually
pieces of apparatus interposed between the engine
and the machinery which is being driven ; but as a
satisfactory explanation of them would carry us
rather more deeply into mechanics than is possible
in a book of this kind, no further space need be given
to them.