Southern 2-10-0 "Decapod" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 8000 (Locobase 66)

Data from tables in 1930 Locomotive Cyclopedia. See the later and quite detailed overview published by designer Alphonse I Lipetz, "Russian 'Decapod' Locomotives", The Railway Engineer, Volume 43, No 2 (February 1922), pp. 51-54; April 1922, pp. 136-137; July 1922, pp. 249-251; and November 1922, pp. 415-417. (Thanks to a 14 June 2013 email from Chris Hohl pointing out that the Southern actually put numbers on these engines.) Works numbers for the locomotives in this entry were Alco's Richmond Works numbers 58837-58846, 58868-58874, 58879 in 1918. (8010 and 8018 never actually operated on the Southern.) Baldwin's works numbers were 48136-48139, 48420, 48466-48467, 48521-48522, 48685 in 1918.

875 were ordered by the Imperial Russian government in 1916; many were delivered and that design was subsequently built in the many hundreds in the Soviet Union. Others went to Japan and 200 stayed in the US. Erie had 75, Seaboard Air Line took 40, Frisco 21, and the rest distributed to 22 other railroads.

Russian decapods allocated to the Southern Railway didn't remain on that road for long. All were reassigned to other roads on 1 January 1919.

Specifications by Steve Llanso of Sweat House Media
Locobase ID66
Number in Class35
Road Numbers8000-8034
Number Built35
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft)18.67
Engine Wheelbase (ft)27.83
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender) (ft)60.08
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)180,200
Engine Weight (lbs)202,600
Tender Light Weight (lbs)133,100
Total Engine and Tender Weight (lbs)335,700
Tender Water Capacity (gals)7000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)60
Geometry Relating to Tractive Effort
Driver Diameter (in)52
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)25" x 28"
Tractive Effort (lbs)51,490
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.50
Heating Ability
Firebox Area (sq ft)227
Grate Area (sq ft)64.70
Evaporative Heating Surface (sq ft)2610
Superheating Surface (sq ft)579
Combined Heating Surface (sq ft)3189
Evaporative Heating Surface/Cylinder Volume164.07
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11,646
Same as above plus superheater percentage13,742
Same as above but substitute firebox area for grate area48,215
Power L18783
Power MT537.27

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