International & Great Northern 0-6-0 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class SW-55 (Locobase 11188)

Data from MP 8 -1936 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Although Locobase has not yet included many North American switchers, he couldn't resist the unusual lineaments of this home-built. In addition to the saddle tank, this design sported widely spaced axles the spacing of which was 7 ft 8 in (2.34 m) between the first and second and a full 9 feet (2.74 m) between the second and third. Add to that inside valve gear, rounded dome over the firebox and thus separating the saddle tank from the cab and IGN had a distinctive little locomotive..

Specifications by Steve Llanso of Sweat House Media
Locobase ID11188
RailroadInternational & Great Northern (MP)
Number in Class1
Road Numbers9575
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase16.67'
Engine Wheelbase16.67'
Ratio of driving wheelbase to overall engine wheebase1
Overall Wheelbase (engine & tender)16.67'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers130000 lbs
Engine Weight130000 lbs
Tender Light Weight
Total Engine and Tender Weight130000 lbs
Tender Water Capacity2000 gals
Tender Fuel Capacity (oil/coal)3 tons
Minimum weight of rail (calculated)72 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter55"
Boiler Pressure150 psi
Cylinders (dia x stroke)16" x 24"
Tractive Effort14243 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 9.13
Heating Ability
Firebox Area104 sq. ft
Grate Area17 sq. ft
Evaporative Heating Surface1268 sq. ft
Superheating Surface
Combined Heating Surface1268 sq. ft
Evaporative Heating Surface/Cylinder Volume227.03
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2550
Same as above plus superheater percentage2550
Same as above but substitute firebox area for grate area15600
Power L14402
Power MT223.96


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.