US Army - East Indian Railways 2-8-2 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class 5'6" MacArthur - AWE (XE) (Locobase 959)

Mikado/MacArthur for the US Army's Transportation Corps in World War II for service on India's broad-gauge lines. Works numbers ran 69674-69713.

Based on the early-1930s standard Indian Railways XE (Locobase 4724) design, production of this 1945 batch came from Eddystone, Pa when British builders were swamped with work. It had a round-top firebox with four arch tubes contributing to direct heating surface area.

It's not clear to Locobase whether Baldwin's locomotives were fitted with the updates (Skefco roller bearings on the rod big ends, and a rear truck using the Cole pattern) described by Vulcan in its 1946 brochure.

Principal Dimensions by Steve Llanso of Middle Run Media

Class5'6" MacArthur - AWE (XE)
Locobase ID959
RailroadUS Army - East Indian Railways
Number in Class40
Road Numbers
Number Built40
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)199,000 / 90,265
Engine Weight (lbs / kg)266,000 / 120,656
Tender Loaded Weight (lbs / kg)171,960 / 78,000
Total Engine and Tender Weight (lbs / kg)437,960 / 198,656
Tender Water Capacity (gals / ML)7200 / 27.27
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)15.40 / 14
Minimum weight of rail (calculated) (lb/yd / kg/m)83 / 41.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)61.50 / 1562
Boiler Pressure (psi / kPa)210 / 14.50
High Pressure Cylinders (dia x stroke) (in / mm)23.5" x 30" / 597x762
Tractive Effort (lbs / kg)48,086 / 21811.47
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.14
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)17.50 / 5.33
Firebox Area (sq ft / m2)286 / 26.58
Grate Area (sq ft / m2)60 / 5.58
Evaporative Heating Surface (sq ft / m2)3014 / 280.11
Superheating Surface (sq ft / m2)763 / 70.91
Combined Heating Surface (sq ft / m2)3777 / 351.02
Evaporative Heating Surface/Cylinder Volume200.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation12,600
Same as above plus superheater percentage15,120
Same as above but substitute firebox area for grate area72,072
Power L116,166
Power MT716.38

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Wes Barris