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

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 6440)

Data from Interstate diagram published on (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 at . 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.

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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID6440 5430
RailroadInterstate (IRR)Interstate (IRR)
Number in Class44
Road Numbers1, 3, 45-8
Number Built44
Valve GearSouthernSouthern
Locomotive Length and Weight
Driver Wheelbase14.25'17'
Engine Wheelbase22.33'26.25'
Ratio of driving wheelbase to overall engine wheebase 0.64 0.65
Overall Wheelbase (engine & tender)52.96'58.83'
Axle Loading (Maximum Weight per Axle)48050 lbs
Weight on Drivers128900 lbs192200 lbs
Engine Weight145500 lbs226500 lbs
Tender Light Weight130000 lbs137400 lbs
Total Engine and Tender Weight275500 lbs363900 lbs
Tender Water Capacity6500 gals7000 gals
Tender Fuel Capacity (oil/coal)9 tons12 tons
Minimum weight of rail (calculated)54 lb/yard80 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter50"61"
Boiler Pressure180 psi180 psi
Cylinders (dia x stroke)21" x 26"25" x 32"
Tractive Effort35086 lbs50164 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.67 3.83
Heating Ability
Firebox Area160 sq. ft214 sq. ft
Grate Area33.20 sq. ft54 sq. ft
Evaporative Heating Surface2005 sq. ft2951 sq. ft
Superheating Surface646 sq. ft
Combined Heating Surface2005 sq. ft3597 sq. ft
Evaporative Heating Surface/Cylinder Volume192.37162.32
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation59769720
Same as above plus superheater percentage597611470
Same as above but substitute firebox area for grate area2880045454
Power L140379900
Power MT276.18454.23

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