Interstate 4-4-0 "American" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Reply to RFP? (Locobase 6075)

Data from 1952 Interstate diagram book provided by Allen Stanley from his extensive Raildata collection in March 2004.

Can't tell anything about when this locomotive came to the Interstate. In fact, it appears that this was a proposal from Baldwin for a single Eight-wheeler that was never actually produced. Firebox heating surface included 12 sq ft of brick arch.

Specifications by Steve Llanso of Sweat House Media
ClassReply to RFP?
Locobase ID6075
RailroadInterstate (IRR)
Number in Class
Road Numbers
Number Built
Valve GearSouthern
Locomotive Length and Weight
Driver Wheelbase (ft)8
Engine Wheelbase (ft)23
Ratio of driving wheelbase to overall engine wheebase 0.35
Overall Wheelbase (engine & tender) (ft)58.83
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)98,000
Engine Weight (lbs)147,000
Tender Loaded Weight (lbs)100,000
Total Engine and Tender Weight (lbs)247,000
Tender Water Capacity (gals)5000
Tender Fuel Capacity (oil/coal) (gals/tons)10
Minimum weight of rail (calculated) (lb/yd)82
Geometry Relating to Tractive Effort
Driver Diameter (in)66
Boiler Pressure (psi)200
High Pressure Cylinders (dia x stroke) (in)20" x 24"
Tractive Effort (lbs)24,727
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.96
Heating Ability
Firebox Area (sq ft)168
Grate Area (sq ft)31
Evaporative Heating Surface (sq ft)1780
Superheating Surface (sq ft)376
Combined Heating Surface (sq ft)2156
Evaporative Heating Surface/Cylinder Volume203.97
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6200
Same as above plus superheater percentage7254
Same as above but substitute firebox area for grate area39,312
Power L115,136
Power MT681.00

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.