Manhattan Railway Company 0-4-2 Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class A' (Locobase 6655)

Data from the 1902 Manhattan Railway Company locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection. According to Brennan's history -- http://www.columbia.edu/~brennan/beach/chapter17.html, accessed 28 October 2005 -- Baldwin and Rhode Island Locomotive Works each produced ten engines.

These were originally built as 0-4-0ST saddle-tank locomotives.

See Locobase 5423 for a more general discussion. The boiler pressure is an estimate as the diagrams do not give the figure. A departure from the usual Forney formula in having only one trailing truck and in placing the firebox over the rear axle.


Class J2 (Locobase 6663)

Data from the 1902 Manhattan Railway Company locomotive diagram book and the JF Webber list of New York Locomotive Works engines supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

See Locobase 5423 for a more general discussion. The boiler pressure is an estimate as the diagrams do not give the figure. These may be the class that was rebuilt by Rome from earlier Baldwin engines. The first was delivered in May, the last in August.

After the Manhattan was electrified, this class was dispersed all over the world.

Specifications by Steve Llanso of Sweat House Media
ClassA'J2
Locobase ID6655 6663
RailroadManhattan Railway CompanyManhattan Railway Company
CountryUSAUSA
Whyte0-4-2T0-4-2T
Number in Class2025
Road Numbers26-35, 46-55
GaugeStdStd
Number Built2025
BuilderseveralNew York
Year18791886
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)65
Engine Wheelbase (ft)12.17
Ratio of driving wheelbase to overall engine wheebase 0.49
Overall Wheelbase (engine & tender) (ft)12.17
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)27,50035,050
Engine Weight (lbs)35,50043,450
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)35,50043,450
Tender Water Capacity (gals)345635
Tender Fuel Capacity (oil/coal) (gals/tons) 0.90 0.50
Minimum weight of rail (calculated) (lb/yd)2329
Geometry Relating to Tractive Effort
Driver Diameter (in)3842
Boiler Pressure (psi)150150
High Pressure Cylinders (dia x stroke) (in)11" x 14"11" x 16"
Tractive Effort (lbs)56845877
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.84 5.96
Heating Ability
Firebox Area (sq ft)44.4049.20
Grate Area (sq ft)1311.15
Evaporative Heating Surface (sq ft)241453
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)241453
Evaporative Heating Surface/Cylinder Volume156.50257.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation19501673
Same as above plus superheater percentage19501673
Same as above but substitute firebox area for grate area66607380
Power L128564170
Power MT457.92524.58


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