Lehigh Valley Ten-Wheeler
Camelback locomotive
The design of the new Lehigh Valley passenger engine is well
illustrated by a number of cuts and an inset. The
Baldwin Works
are
building five of them. They are intended to haul passenger trains
weighing 800,000 lbs., exclusive of engine and tender, between Easton
and Wilkes-Barre without a helper. A profile of the road between Mauch
Chunk is given on the inset, and shows how very heavy are the grades
and how frequent the curves of that part of the line upon which these
engines will run.
Lehigh Valley
Camelback locomotive side-view plans
The engine is a Vauclain compound with wide fire-box and 72 in. in
diameter. The cylinders are 17 and 28 in. in diameter, respectively,
with 26-in. stroke. The weight of engine in working order is 182,000
lbs., the truck carrying 47,000 lbs. and the remainder, 135,000 lbs.,
is on the drivers. The fuel is hard coal, and the pressure carried is
200 lbs. Sling stays are only used under the dome and to support the
area of crown sheet immediately under the dry pipe. The fire-box is 90
x 114 ins., and the crown sheet is longitudinally straight. The crown
and side sheets are made from one plate, and are therefore without
seams. The total heating surface is 2,708.3 sq. ft. The frames are
open-hearth steel castings. The piston rods are hollow made of
open-hearth steel, and are extended through front cylinder covers. The
weight of boiler used necessitated the reduction of weight of machinery
as far as possible within the limits of safety so that the allowable
weight on track would not be exceeded. Cast steel was therefore used
extensively.
The engine truck frame is composed of two bars, with cast I 4/; steel
transom, and the cradle is supported by heart-shaped "three-point"
hangers, to better adapt the engine for the curving track over which it
will run. The main frame was designed with special reference
to
push
down driver brake fixtures. The brake shoes are in rear of the drivers.
In the valve gear two rockers are used, which is the Lehigh Valley
practice, when it would otherwise be necessary to bridge or go under a
forward axle with valve gear.
(from
a 1900 magazine - in the public domain)
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