Memphis, Dallas & Gulf 4-4-0 "American" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 300 (Locobase 6637)

Data from 1919 MD & G locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

By the time this locomotive was built, its grate and boiler size was considerably smaller than average.

Specifications by Steve Llanso of Sweat House Media
Locobase ID6637
RailroadMemphis, Dallas & Gulf
Number in Class1
Road Numbers300
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 8.12'
Engine Wheelbase20.96'
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers
Engine Weight
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)0
Geometry Relating to Tractive Effort
Driver Diameter60.50"
Boiler Pressure150 psi
Cylinders (dia x stroke)16" x 24"
Tractive Effort12948 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area98 sq. ft
Grate Area15.32 sq. ft
Evaporative Heating Surface863 sq. ft
Superheating Surface
Combined Heating Surface863 sq. ft
Evaporative Heating Surface/Cylinder Volume154.52
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2298
Same as above plus superheater percentage2298
Same as above but substitute firebox area for grate area14700
Power L13664
Power MT

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.