Heating surface: Tubes 1598.5
Firebox 102.5
------
1701.0
Firegrate area 23.3 [1]
Sectional area through tubes (disregarding ferrules) 3.5
Least sectional area of chimney. 1.35
Ratio of firegrate area to heating surface. 1:73
Ratio of flue area through tubes to firegrate area. 1:6.7
Ratio of least sectional area of chimney to firegrate area. 1:17.26
[Transcribers note 1: Best guess, 2nd digit illegible]
The proportion of chimney area to grate is much smaller than in ordinary
locomotives, this proportion having no doubt been fixed upon to enable a
strong draught to be obtained with the engine running at a slow speed.
Of the general fittings of the engine we need give no description, as
their arrangement will be readily understood from our engravings, and
in conclusion we need only say that the locomotive under notice is
altogether a very interesting example of an engine designed for
specially heavy work.--_Engineering_.
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