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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The Locomotive 257
and the “ Rocket ” won. It weighed only 4J tons,
while the modern engine weighs 100 tons. The boiler
was 6 ft. long, 40 inches in diameter, and contained
twenty-five 3-inch tubes giving a large heating sur
face, and enabling steam to be made rapidly. The
cylinders were inclined, and the wheels were con-
, nected by a coupling-rod so as to increase the grip
on the rails. (See Fig. 143, Plate 25.)
By the time that the line was opened several
engines were ready, but the joy of success was marred
by a terrible tragedy. Mr. Huskisson, M.P., a famous
statesman, was knocked down and so badly injured
that he died the same day. In conveying him to
a place where he could receive attention, the
“ Northumbrian,” with Stephenson on the footplate,
covered a fifteen-minute journey at the rate of
thirty-six miles an hour. The sad event secured
great publicity for the locomotive, and led perhaps
to a greater interest in it than would have been
obtained if there had been no mishap.
During the next three years improvements were
made, and the locomotive rapidly assumed the general
form which is so familiar to-day. The cylinders
were placed in front, underneath or on each side of
the smokebox, and were horizontal or only slightly
inclined. The boiler was supplied with a steam dome,
in which was placed the valve admitting steam to the
cylinders. The greater height of this valve above
the surface of the water enabled drier steam to be
obtained and thus reduced priming. Apart from
these features, there was one outstanding invention