Interstate 2-8-0 "Consolidation" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 6440)

Data from Interstate diagram published on http://hobbystop.tripod.com/id67.html (visited 26 Dec 2004) and Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 30, p. 131. See also the history presented on the hillbillysavants blog athttp://hillbillysavants.blogspot.com/2006/12/appalachian-railroads-part-1.html . Works numbers were 29136 in September 1906 and 32469 in December 1907.

The IRR ran between Stonega and Norton, Va and between Norton and Glamorgan. An additional 18-mile branch line connected Norton with the Clinchfield.

These engines were later retrofitted with Southern valve gear.


Class 5 (Locobase 5430)

Data from a table in May 1916 RME; see also DeGolyer Vol 59, pp. 420+. Works numbers were 42693-42695 in December 1915 and 53097 in April 1920..

This westernVirginia shortline class served the 88-mile road for decades from the time of their purchase. Interstate opened in1896 to move coal from several mines to L & N's connection at Appalachia. Later links reached Norton (N & W) and the Miller Yard (Clinchfield). In 1960 it was acquired by the Southern Railway.

These Consolidations had relatively tall drivers for a mountain profile, extended a long stroke in cylinders fed by 14" (356 mm) piston valves,, and rode lightly (which resulted in a low factor of adhesion). A small boiler was partially compensated for by a decent amount of superheat, though the design clearly was conservative.

Principal Dimensions by Steve Llanso of Sweat House Media
Class15
Locobase ID6440 5430
RailroadInterstate (IRR)Interstate (IRR)
CountryUSAUSA
Whyte2-8-02-8-0
Number in Class44
Road Numbers1, 3, 45-8
GaugeStdStd
Number Built44
BuilderBaldwinBaldwin
Year19031915
Valve GearStephensonSouthern
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.25 / 4.3417 / 5.18
Engine Wheelbase (ft / m)22.33 / 6.8126.25 / 8
Ratio of driving wheelbase to overall engine wheebase 0.64 0.65
Overall Wheelbase (engine & tender) (ft / m)52.96 / 16.1458.83 / 17.93
Axle Loading (Maximum Weight per Axle) (lbs / kg)48,050 / 21,795
Weight on Drivers (lbs / kg)128,900 / 58,468192,200 / 87,181
Engine Weight (lbs / kg)145,500 / 65,998226,500 / 102,739
Tender Loaded Weight (lbs / kg)130,000 / 58,967137,400 / 62,324
Total Engine and Tender Weight (lbs / kg)275,500 / 124,965363,900 / 165,063
Tender Water Capacity (gals / ML)6500 / 24.627000 / 26.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)9 / 8.2012 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 2780 / 40
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 127061 / 1549
Boiler Pressure (psi / kPa)180 / 12.40180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)21" x 26" / 533x66025" x 32" / 635x813
Tractive Effort (lbs / kg)35,086 / 15914.7650,164 / 22754.03
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.67 3.83
Heating Ability
Firebox Area (sq ft / m2)160 / 14.87214 / 19.89
Grate Area (sq ft / m2)33.20 / 3.0954 / 5.02
Evaporative Heating Surface (sq ft / m2)2005 / 186.342951 / 274.26
Superheating Surface (sq ft / m2)646 / 60.04
Combined Heating Surface (sq ft / m2)2005 / 186.343597 / 334.30
Evaporative Heating Surface/Cylinder Volume192.37162.32
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation59769720
Same as above plus superheater percentage597611,470
Same as above but substitute firebox area for grate area28,80045,454
Power L140379900
Power MT276.18454.23

All material Copyright © SteamLocomotive.com
Wes Barris