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 Class0
Road Numbers
Number Built0
Valve GearSouthern
Locomotive Length and Weight
Driver Wheelbase8'
Engine Wheelbase23'
Ratio of driving wheelbase to overall engine wheebase 0.35
Overall Wheelbase (engine & tender)58.83'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers98000 lbs
Engine Weight147000 lbs
Tender Light Weight100000 lbs
Total Engine and Tender Weight247000 lbs
Tender Water Capacity5000 gals
Tender Fuel Capacity (oil/coal)10 tons
Minimum weight of rail (calculated)82 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter66"
Boiler Pressure200 psi
Cylinders (dia x stroke)20" x 24"
Tractive Effort24727 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.96
Heating Ability
Firebox Area168 sq. ft
Grate Area31 sq. ft
Evaporative Heating Surface1780 sq. ft
Superheating Surface376 sq. ft
Combined Heating Surface2156 sq. ft
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 area39312
Power L115136
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.