Republic Iron & Steel 2-6-0 "Mogul" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 11 (Locobase 13960)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 52, p. 218, Volume 53, p. 107, and Volume 62, pp 205+. (Thanks to Chris Hohl for his 4 April 2015 email correcting the tender's coal capacity.) Works numbers were 43282-43283 in May 1916, 45921-45922 in July 1917, and 49222 in July 1918.

Ticketed for one of Republic's Ohio operations, these powerful Moguls were intended to roll on 85-lb/yard (42.5-kg/metre) rail, scale 3% grades, and run around curves of 338-ft (103-metre) radii. The firebox had "two combustion tubes ...applied in each side of fire box with a steam jet to inject air into firebox, the same to be controlled by a globe valve in the turret." In addition, the specs required the "smokebox and firebrick arrangement ...to be such as to prevent show of smoke."


Class 21 (Locobase 14689)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 73, pp. 122+. Works number was 56605 in May 1923.

Most of the RI&SC Moguls (Locobase 13960) were sizable for their wheel arrangement and generated considerable tractive effort. This smaller engine was no slouch as a switcher, but used a boiler with evaporative heating surface area half the size of the others. But its superheater area promised very dry steam.


Class 22 (Locobase 14690)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 73, pp. 127+. Works number not given; ordered 14 February 1923.

For some reason, Gene Connelly's list of Baldwin production doesn't include this single example of the standard RI&SC Mogul (Locobase 13960) delivered with a superheated boiler. Power dimensions remained the same and, remarkably, the combined heating surface area was nearly identical.


Class 24 (Locobase 13959)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 43, p. 316. Works number was 38847 in November 1912.

This burly switcher was expected to handle 4% maximum grades and curves as tight as 36 degrees.

Specifications by Steve Llanso of Sweat House Media
Class11212224
Locobase ID13,960 14,689 14,690 13,959
RailroadRepublic Iron & SteelRepublic Iron & SteelRepublic Iron & SteelRepublic Iron & Steel
CountryUSAUSAUSAUSA
Whyte2-6-02-6-02-6-02-6-0
Number in Class5111
Road Numbers11-12, 14-15, 17212224
GaugeStdStdStdStd
Number Built5111
BuilderBaldwinBaldwinBaldwinBaldwin
Year1916192319231913
Valve GearStephensonWalschaertStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)13.5011.6713.5011.17
Engine Wheelbase (ft)2220.5022.1719.83
Ratio of driving wheelbase to overall engine wheebase 0.61 0.57 0.61 0.56
Overall Wheelbase (engine & tender) (ft)5255.675350.87
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)155,000136,000158,000140,000
Engine Weight (lbs)175,000153,000180,000160,000
Tender Loaded Weight (lbs)100,000105,000106,000100,000
Total Engine and Tender Weight (lbs)275,000258,000286,000260,000
Tender Water Capacity (gals)5000500050005000
Tender Fuel Capacity (oil/coal) (gals/tons)8887
Minimum weight of rail (calculated) (lb/yd)86768878
Geometry Relating to Tractive Effort
Driver Diameter (in)50485051
Boiler Pressure (psi)180180180200
High Pressure Cylinders (dia x stroke) (in)22" x 26"21" x 24"22" x 26"20" x 26"
Tractive Effort (lbs)38,50733,73738,50734,667
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.03 4.03 4.10 4.04
Heating Ability
Firebox Area (sq ft)20184201175
Grate Area (sq ft)35.1025.1035.1024.75
Evaporative Heating Surface (sq ft)2450126220341952
Superheating Surface (sq ft)382423
Combined Heating Surface (sq ft)2450164424571952
Evaporative Heating Surface/Cylinder Volume214.18131.17177.81206.48
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6318451863184950
Same as above plus superheater percentage6318555773924950
Same as above but substitute firebox area for grate area36,18018,59842,33135,000
Power L14530766389775084
Power MT193.30372.66375.78240.18


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