New York Elevated/Manhattan Railway 0-4-2 Locomotives in 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 Rail Data Exchange. See also "New Locomotives for the New York Elevated Railways", Engineering News and American Railway Journal, Volume 3, (15 February 1894), pp. 141-142. According to Brennan's history -- [], accessed 28 October 2005. Baldwin (works numbers 4369, 4371-4374 in June 1878; 4399, 4402, 4408 in August; 4412, 4419 in September) and Rhode Island Locomotive Works (works numbers 719, 715-718 in August 1878; 725-729 in September).

These were originally built as 0-4-0ST saddle-tank locomotives, to which a trailing axle was later added. The other dimensions remained unchanged.

See Locobase 5423 for a more general discussion. The boiler pressure is an estimate as the diagrams do not give the figure.

Principal Dimensions by Steve Llanso of Middle Run Media

ClassA'
Locobase ID6655
RailroadNew York Elevated/Manhattan Railway
CountryUSA
Whyte0-4-2T
Number in Class20
Road Numbers26-30, 35, 31-34, 51-55
GaugeStd
Number Built20
Builderseveral
Year1879
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)6 / 1.83
Engine Wheelbase (ft / m)12.60 / 3.71
Ratio of driving wheelbase to overall engine wheelbase 0.48
Overall Wheelbase (engine & tender) (ft / m)12.60 / 3.71
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)27,500 / 12,474
Engine Weight (lbs / kg)35,500 / 16,103
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)35,500
Tender Water Capacity (gals / ML)345 / 1.31
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.90 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)23 / 11.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)38 / 965
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)11" x 14" / 279x356
Tractive Effort (lbs / kg)5684 / 2578.22
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.84
Heating Ability
Tubes (number - dia) (in / mm)100 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 5.50 / 1.68
Firebox Area (sq ft / m2)44.40 / 4.13
Grate Area (sq ft / m2)13 / 1.21
Evaporative Heating Surface (sq ft / m2)241 / 22.40
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)241 / 22.40
Evaporative Heating Surface/Cylinder Volume156.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1950
Same as above plus superheater percentage1950
Same as above but substitute firebox area for grate area6660
Power L12856
Power MT457.92

All material Copyright © SteamLocomotive.com
Wes Barris