The Topeka state journal. [volume] (Topeka, Kansas) 1892-1980, 1915-04-10
Popular Exhibit of Passenger
Power at Big Fair.
Locomotive Attracting COnsid-
cradle Attention There.
BUILT JOINTLY BY BALDWIN
Engine Develops Tractive Force
of 41,OOO Pounds.
Meets Severe Requirements of
Santa Fe'S Traffic.
THURSDAY

The exhibit of the BALDWIN Loco
motive works at the Panama-Eacific
International exposition includes a
Pacific type locomotive for the Atch-
ison, Topeka & Santa Fe railway
This is a single expansion engine US
ing Superheated steam, and designed
to develop maximum capacity with a
limiting weight of $4,000 pounds per
pair of driving wheels The actual
weight runs close to this limit, as the
driving wheels carry 172, $50 pounds
The design was prepared jointly by
the railway company and the build
ers, and the locomotive is specially
fitted for meeting the severe require
ments of through passenger traffic
on the Santa Fe system AS in all
recent Santa Fe locomotives. the de-
tails have been designed to inter
change, as far as practicable, with
those of locomotives previously built
The new locomotive develops a trac-
tive force of Al, 900 pounds, with a
ration of adhesion of AZ. The total
equivalent heating surface in square
feet to tractive force in pounds, is
as L to 60. This indicates literal
stea ming capacity in proportion to ad-
heSion; while, with a ratio of AZ, full
tractive force can be developed under
all ordinary conditions of service.
Barrel of Boiler.
The boiler barrel is composed of
three courses, the middle course be-
ing tapered with the slope on top
The diameter of the first course is 80
degrees and of the third course, 80
degrees. The main and auxiliary
domes are both placed on the third
course. A circular opening, 16 inches
in diameter, under the auxiliary dome,
permits entrance to the boiler with
out dismantling the fittings in the
main dome. The Chambers throttle
is used
The boiler is equipped for oil burn
ing, but the stay bolts are so located
that arch tubes can subsequently be
the locomotive for coal burning The
door sheet of the inside firebox is
Hanged outward. so that the rivet
heads are in the water space; and the
seam is closed with copper caulk-
ing strip The O'Connor fire door
flang is used and here the seam is
welded by the autogenous process
Flexible bolts are used in the break
age zones in the throat, sides and
back and also in the first four rows
of crown stays. The Schmidt super
heater consists of 40 elements, and
the superheating surface is $50 square
feet
Oil Burning Engine.
The arrangement of the front end is
suitable for the use of oil fuel. and the
smoke box is comparative unobstruct-
ed. 1t contains a single nozzle of
moderate height, and a long adjust
able petticoat pipe The use of out
side steam pipes further simplifies the
smoke box arrangement
The steam distribution is controlled
by 16-inch piston valves, which are
driven by the Baker valve motion.
The Ragonnet power reverse mechan-
ism is applied The valves are set
with a lead of Il and in full gear they
cut off at 81 per cent of the stroke.
The cylinders are fitted with vacuum
relief valves, but no bypass valves are
used. The cylinder castings are
strongly built, with steam and exhaust
passages of liberal cross-section- All
cylinder saddle bolts are double
nutted-
The frames are of cast steel, each
being made in two sections with the
splice located back of the rear driving
pedestals. The main sections are )
inches in width The rame splice has
a slab fit with large bearing area,
and is secured by 8 horizontal bolts.
each Is inches in diameter, and a
pair of veryicle keys A substantial
system of transverse frame bracing is
applied. The guide pearer brace IS a
large steel casting, which extends the
full depth of the leading driving ped
estaIs and serves as a fulcrum for the
driying-brake shaft The valve mo-