Natchez & Hamburg 0-4-0 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Mississippi (Locobase 1018)

First locomotive in the Deep South. Source (Kinert, 1962) gives tractive power as 4,820 lb, but given the year in which the Mississippi was built, this seems very high. Driver diameter is given as 43 in, but that would require a boiler pressure of 170 lb, which, again, seems unlikely for this era.

Anthony Bianculli (Trains & Technology, Vol 1, 2001) gives the same data and credits it to Henry Dunham of New York.

I still find that 170 psi very hard to believe.

Specifications by Steve Llanso of Sweat House Media
Locobase ID1018
RailroadNatchez & Hamburg
Number in Class1
Road Numbers
Number Built1
BuilderHenry Dunham
Valve Gear
Locomotive Length and Weight
Driver Wheelbase 4.67'
Engine Wheelbase 4.67'
Ratio of driving wheelbase to overall engine wheebase1
Overall Wheelbase (engine & tender)15.42'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers19700 lbs
Engine Weight19700 lbs
Tender Light Weight7000 lbs
Total Engine and Tender Weight26700 lbs
Tender Water Capacity
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)16 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter43"
Boiler Pressure170 psi
Cylinders (dia x stroke)9.5" x 16"
Tractive Effort4853 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Firebox Area
Grate Area 6.40 sq. ft
Evaporative Heating Surface
Superheating Surface
Combined Heating Surface0
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1088
Same as above plus superheater percentage1088
Same as above but substitute firebox area for grate area0
Power L10
Power MT0


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.