Atlantic Coast Line 2-10-0 "Decapod" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class O (Locobase 4400)

857 2-10-0s were built by Baldwin and Alco (Richmond and Schenectady Works) for the Russian Government. When that empire was overthrown, some 200 more of the Russian order was diverted to railroads in the US, including the ACL.

Ilustrations in Linn Wescott (Model Railroader Cyclopedia - Vol 1, 1960) and see Drury (1993), 176. See the 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.

Specifications by Steve Llanso of Sweat House Media
ClassO
Locobase ID4400
RailroadAtlantic Coast Line (ACL)
CountryUSA
Whyte2-10-0
Number in Class10
Road Numbers8000-8009
GaugeStd
Number Built10
Builderseveral
Year1918
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)18.33 / 5.59
Engine Wheelbase (ft / m)27.54 / 8.39
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)35,000 / 15,876
Weight on Drivers (lbs / kg)175,000 / 79,379
Engine Weight (lbs / kg)197,900 / 89,766
Tender Loaded Weight (lbs / kg)133,000 / 60,328
Total Engine and Tender Weight (lbs / kg)330,900 / 150,094
Tender Water Capacity (gals / ML)7400 / 28.03
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT) 8.80 / 8
Minimum weight of rail (calculated) (lb/yd / kg/m)58 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)52 / 1321
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)25" x 28" / 635x711
Tractive Effort (lbs / kg)51,490 / 23355.50
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.40
Heating Ability
Firebox Area (sq ft / m2)227 / 21.10
Grate Area (sq ft / m2)64.70 / 6.01
Evaporative Heating Surface (sq ft / m2)2610 / 242.57
Superheating Surface (sq ft / m2)579 / 53.81
Combined Heating Surface (sq ft / m2)3189 / 296.38
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 MT553.23

Reference