If the first hole is drilled accurately, the second hole should
be made without removing the drill, as this will ensure the two holes being
in line. If, however, luck is against you, enlarge the holes and get the
rod into its correct position by screwing and soldering small drilled
plates to the outside of the chest. Also drill and tap a hole for the
lubricator. The attachment of the gland (Fig. 54, G2) is similar to that of
the cylinder gland, and therefore need not be detailed.
The Valve Plate (Fig. 59).--Three ports must be cut in this--a central
one, 7/8 by 3/32 inch, for the exhaust; and two inlets, 7/8 by 3/32 inch,
1/8 inch away from the exhaust. These are easily opened out if a series of
holes be drilled along their axes.
[Illustration: FIG. 69.--Valve plate.]
The Steam Ways.--The formation of the steam ways between valve plate and
cylinder is the most ticklish bit of work to be done on the engine as it
entails the making of a number of solder joints close together.
[Illustration: FIG. 60.--Piece for steam ways.]
We begin by cutting out of 1/20-inch sheet brass a piece shaped as in Fig.
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