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


Class Details by Steve Llanso of Sweat House Media

Class O (Locobase 4400)

Data from ACL 12 - 1946 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange collection. 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. (Thanks to Chris Hohl for his 8 February 2019 email correcting the Russian decapods' wheelbases.) Alco's Richmond plant works numbers were 58858, 58860 and 58875-58878 (ACL road numbers 8006, 8008, 8000-8001 , 8005, and 8003, respectively.) Baldwin works numbers were 47369-47371, 48130 (8002, 8004, 8007, 8009).

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.

Although all of the Russian decks were built to a common specification, several US railroads published later diagrams that reflected either updates or their own standards of measurements.

ACL sold the 8000-8001, 8004 in January 1942 to the Charleston & Western Carolina as their 403-405 (joining the three transferred from the Southern Railway to the C&WC almost three decades earlier). All of the others served throughout World War II before being scrapped in 1949-1952.

Principal Dimensions by Steve Llanso of Middle Run 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)18.67 / 5.69
Engine Wheelbase (ft / m)27.54 / 8.39
Ratio of driving wheelbase to overall engine wheelbase 0.68
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)35,000 / 15,876
Weight on Drivers (lbs / kg)184,520 / 83,697
Engine Weight (lbs / kg)210,000 / 95,255
Tender Loaded Weight (lbs / kg)133,000 / 60,328
Total Engine and Tender Weight (lbs / kg)343,000 / 155,583
Tender Water Capacity (gals / ML)7400 / 28.03
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 8.80 / 8
Minimum weight of rail (calculated) (lb/yd / kg/m)62 / 31
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) 3.58
Heating Ability
Tubes (number - dia) (in / mm)194 - 2" / 51
Flues (number - dia) (in / mm)28 - 5.375" / 137
Flue/Tube length (ft / m)17 / 5.18
Firebox Area (sq ft / m2)227 / 21.09
Grate Area (sq ft / m2)65 / 6.04
Evaporative Heating Surface (sq ft / m2)2626 / 243.96
Superheating Surface (sq ft / m2)579 / 53.79
Combined Heating Surface (sq ft / m2)3205 / 297.75
Evaporative Heating Surface/Cylinder Volume165.05
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11,700
Same as above plus superheater percentage13,806
Same as above but substitute firebox area for grate area48,215
Power L18797
Power MT525.53

All material Copyright © SteamLocomotive.com
Wes Barris