Central RR of New Jersey 2-8-2 "Mikado" Locomotives in the USA

The USRA assigned ten USRA "Mikado-Heavy" locomotives to the Central Railroad of New Jersey and they arrived from the American Locomotive Company in 1918. These locomotives set the specifications for the balance of the 2-8-2s that the CNJ would buy. A total of eighty-six "Mikados" would be added to the roster between 1918 and 1925. In 1945, all the CNJ 2-8-2s were combined into one class designated as Class M-63.

The first "Mikado" type locomotives on the CNJ were the ten USRA "Mikado-Heavy" locomotives which arrived in 1918. This group was built by the American Locomotive Company and was designated as Class M-1 and carried road numbers 850 through 859. They had 63" diameter drivers, 27" x 32" cylinders, a 190 psi boiler pressure, exerted 59,800 pounds of tractive effort and each weighed 320,000 pounds. The firebox was 307 square feet. The Evaporative heating surface was 4,293 square feet and with the superheater the combined heating surface was 5,286 square feet.

In 1920, ALCO delivered eleven "Mikados" which were designated as Class M-2 and given road number 860 through 870 and another twenty-five in 1922 which were designated as Class M-2c and assigned road numbers 871 through 895.

In 1923, another twenty 2-8-2s came from ALCO. This group was designated as Class M-3 and was assigned road numbers 896 through 915. After buying sixty-six 2-8-2s from ALCO the last group the CNJ would buy was bought form the Baldwin Locomotive Works. These twenty locomotives were designated as M-3a and carried road numbers 916 through 1925

There are no surviving Central Railroad of New Jersey 2-8-2 "Mikado" type locomotives.


ClassLater ClassQty.Road NumbersYear BuiltBuilderNotes
  1. Numbers 850-859 USRA allocated "Mikado-Heavy" locomotives. Numbers 855, 857, 858 and 859 sold to the Pittsburgh & West Virginia in 1947 and became P&WV numbers 1150-1053. All others scrapped between 1947 and 1949.
  2. Numbers 860-870 scrapped between 1947 and 1952.
  3. Numbers 871-895 scrapped between 1947 and 1955. Number 871 among the last to be scrapped in October 1955.
  4. Numbers 896-915 scrapped between 1947 and 1954.
  5. Numbers 916-935 scrapped between 1951 and 1955. The last to be scrapped were number 922, scrapped in September 1955, and numbers 871, 924, 925 and 935 scrapped in October 1955

Class Details by Steve Llanso of Sweat House Media

Class M-2/2as/3/3as / M-63 (Locobase 5)

Data from table in 1930 Locomotive Cyclopedia and CNJ 7 - 1944 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 69, pp. 35+. (Many thanks to Chris Hohl for his 22 September 2017 email reporting unlikely boiler pressure values for 177 entries. A Locobase macro caused the error .)

Firebox had combustion chamber that contributed 53 sq ft (4.9 sq m) to direct heating surface, boiler had Superheater Company (Elesco) feed water heater, piston valves measured 14" (356 mm) in diameter. Virtually identical to USRA Heavy Mikado but with a wide firebox for anthracite coal. The large stud of Mikes arrived over a five-year period, but were essentially identical as designed. Brooks supplied the M-2 and M-2as (860-895), Schenectady the next 20 as M-3 (896-915), and Baldwin the last 20 (916-935 - works numbers 58273-58274, 58293-58304 in March 1925, 58404-58409 in May).

Many were later fitted with thermic syphons and two arch tubes, which increased the firebox heating surface to 430 sq ft and total heating surface to 5,486 sq ft.

Principal Dimensions by Steve Llanso of Sweat House Media
ClassM-2/2as/3/3as / M-63
Locobase ID5
RailroadCentral RR of New Jersey
Number in Class76
Road Numbers860-935
Number Built76
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)16.50 / 5.03
Engine Wheelbase (ft / m)37.10 / 11.31
Ratio of driving wheelbase to overall engine wheebase 0.44
Overall Wheelbase (engine & tender) (ft / m)76.70 / 23.38
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)254,010 / 115,217
Engine Weight (lbs / kg)340,510 / 154,453
Tender Loaded Weight (lbs / kg)188,400 / 85,457
Total Engine and Tender Weight (lbs / kg)528,910 / 239,910
Tender Water Capacity (gals / ML)12,000 / 45.45
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)17 / 15.50
Minimum weight of rail (calculated) (lb/yd / kg/m)106 / 53
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)27" x 32" / 686x813
Tractive Effort (lbs / kg)62,949 / 28553.22
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.04
Heating Ability
Firebox Area (sq ft / m2)357 / 33.17
Grate Area (sq ft / m2)94.80 / 8.81
Evaporative Heating Surface (sq ft / m2)4335 / 402.88
Superheating Surface (sq ft / m2)994 / 92.38
Combined Heating Surface (sq ft / m2)5329 / 495.26
Evaporative Heating Surface/Cylinder Volume204.43
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation18,960
Same as above plus superheater percentage22,562
Same as above but substitute firebox area for grate area84,966
Power L114,920
Power MT517.98

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