Soviet State 2-10-4 Locomotives in Russia

Class Details by Steve Llanso of Sweat House Media

Class T (Locobase 730)

Data from Alfred W Bruce, The Steam Locomotive in America - Its development in the twentieth century (New York: W W Norton, 1952), p. 368.

Five of this arrangement (and five 2-10-2s by Baldwin) were built for the Soviet Union. Compared to the Baldwins, these Alcos pressed harder and had a bigger evaporative surface area. Both had impressive superheat ratios. See the Baldwin entry at Locobase 728 for a discussion of Soviet intent.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID730
RailroadSoviet State
CountrySoviet Union
Number in Class5
Road Numbers10,000
Number Built5
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)21 / 6.40
Engine Wheelbase (ft / m)41.17 / 12.55
Ratio of driving wheelbase to overall engine wheelbase 0.51
Overall Wheelbase (engine & tender) (ft / m)84.67 / 25.81
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)249,800 / 113,308
Engine Weight (lbs / kg)365,200 / 165,652
Tender Loaded Weight (lbs / kg)276,000 / 125,192
Total Engine and Tender Weight (lbs / kg)641,200 / 290,844
Tender Water Capacity (gals / ML)11,400 / 43.18
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)83 / 41.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 1524
Boiler Pressure (psi / kPa)240 / 16.50
High Pressure Cylinders (dia x stroke) (in / mm)27.5" x 30" / 699x762
Tractive Effort (lbs / kg)77,138 / 34989.25
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.24
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)19 / 5.79
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)86 / 7.99
Evaporative Heating Surface (sq ft / m2)4101 / 381.13
Superheating Surface (sq ft / m2)1740 / 161.71
Combined Heating Surface (sq ft / m2)5841 / 542.84
Evaporative Heating Surface/Cylinder Volume198.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation20,640
Same as above plus superheater percentage26,832
Same as above but substitute firebox area for grate area
Power L1
Power MT

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