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Model Steam Locomotives
ments of locomotive
engineering have
produced the “At-
lantic,” or 4—4—2,
fype machines. The
"Atlantic” has many
of the advantages of
the bogie single ex-
press engine. The
rigidity of the
eoupled-wheel base
is a negligible quazi-
tity; Lhe firehux may be of great length, or, as in Lhe case of
the GN. No, 21 class, a wide firebox (Wootten type)
ean be fitted over the trailing carrying wheels. Inded,
the “Atlantic” may be considered as a development of the
4—2—2 type, and the coupled wheels heimg of moderate
diamcter, the great drawback of the single wheeler dis-
appears.
Fig, 25.—Model of ese of she Original American Atlantics.
Fig. 26,—Model 7 1/4 in. Gauge Locomotive “Cardean” (Caledonian Railway),20
