The times dispatch. [volume] (Richmond, Va.) 1903-1914, 1907-10-20
IB|G LOCOMOTIVES
AT THE EXPOSITION.
! American and Baldwin Types
Show Most Modern De
velopment.
AFTER SPEED AND POWER
i. Great Improvement Within the
!. Past Three Iears-Very
Fine Exhibit.
r. SPEED AND POWER

The locomotive exhibit at the
Jamestown Exposition represents the
progress of the builders within the
past three years particularly. mas
much as 1t shows the development
since the st. Louis Exposition. In
that time tile tendency has been to
increase size and power. There are
Two freight locomotives building by
the American Locomotive Company Of
Richmond FOR the Southern Railway
and the Chesapeake and Ohio, togeth-
er with the Baldwin type. for freight
and passenger service.
T While the maximum load per axle
as used In 1904 has not been exceeded.
the larger cylinders and heating sur
face, and consequent Increase in pow
er. is made possible by the use of
larger number OF wheels and axles.
The Baltimore and Ohio Mallet COM
pound at st. Louis had IL drivers. with
an average weight per driver of 27S00
pounds and a total weight OF 334,500
pounds. NIL on drivers. The Mallet
compound for the Northern Pacific at
jamestown has even less weight per
driver. but in order to carry the ad-
ditional weight of engine. which is
$4,000 pounds, pony tracks are In
~ oAdSSa AhSHI fth0 OaSh. IS GAaJcL
compound for the Erie built by the
American Locomotive Company ac-
compiishes the same purpose by the
use of an additic<.l pair of drivers
front and back, Iand this engine has
16 drivers. withjla total load OF 49,
900 pounds. all al the drivers. and the
weight per wheel is only 25,60o
pounds.
The Prairie Type.
The Prairie type locomotive for the
Santa Fe at Jamestown Is a Baldwin
tour-cylinder compound and notable
for the enormous amount OF heating
surfnce in a locomotive with six driv-
ing wheels. The driving wheels are
60 inches in diameter, and as the trac-
tive effort is 1880 pounds, the engine
would be we'll adapted for heavy pas
senger trains on mountain grades. In
this design the Inside cylinders are
inclined, and the pistons are connected
TO scranked axles on the middle drivers,
and the interference of tho main rod
with the front axle is thus avoided.
The most powerful passenger locomo-
tives Mt ST. Louis were OF the Pacific
type, with cylinders 22 by 2S inches.
7T-inch drivers and total heating sur
face OF 1858 square feet. This amount
of heating surface In passenger To-
connective was an increase of so per
cent, over that used by the largest
locomotives exhibited Mt the Coluln-
blan Exposition at Chicago. 1898. but
the heating surface, 4.01S square feet,
in the Prairie locomotive at Jamestown
Is 81 per cent. greater than that in the
large Pacific locomotive at st. Louis,
1904. when illustrates the statement
that, while the unit weight per driv-
ing wheel Is not increasing, yet ways
and means are found to obtain large
Increases in heating surface. The Pa
cilc locomtive for the Southern rail-
| way, which the Baldwin Locomotive
Works exhibits at Jamestown, has
cylinders OF the same size as those of
the engines shown at st. Louis. % by
| IS inches, but with smaller driving
wheels 1t has SIS more square feet of
heating surface, which gives it a large
margin Of extra power for heavier
trains or higher speed,
Largest locomotive Yet.
| The consolidation locomotive ex-
hibited by the Baldwin Works Is the
largest thus far built at Its plant, and
the cylinders are the largest ever used
on simple engines of this type. They
are rs by 80 Inches. and with 63-lnch
wheels and 100 pounds working steam
pressure the tractiye effort Is $4,000
pounds. The diameter of boiler, s.,
inches has only been cQualed by that
OF the Pittsburg Bessemer ana Lake
| Erie consolidation, which Is the same
Size and the latter engine has a trac-
tive effort OF $500 pounds, but 1t Is
fobtalned blythe use OF b4-inch drivers
and much higher boiler pressure. The
| largest consolidation locomotive ex-
limited mt St4Louls was that of the
New York Central, whieh had cylinders
% by ~ inches, weight on drivers Of
Il SN, nSn 4.
3.9O2 square feet and tractiye effort OF
4b.T00 pounds. This engine, like the
| Baldwin consolidation at Jamestown
had 6a-inch wheels. The ten-wheel
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