Long Island 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class S51 (Locobase 9078)

Data from Milton J. Foreman, , William Augustus Evans, Paul P Bird, Gilbert E Ryder, Herbert H Evans, The Electrification of Railway Terminals (Chicago: R R Donnelly & Sons, 1908), p 77. See also E E R Tratman, "Tank Locomotives", Official Proceedings of the Western Railway Club (Chicago: W F Hall Printing Company, 1903), pp. 342 et seq; and DeGolyer, Volume 26, p. 269. Baldwin works numbers 23929-23930, 24008 in March 1904 and 24056, 24082 in April.

This locomotive was cited as one of many examples of tank locomotives whose characteristics were decried as dirty and inefficient in this promotion of electrification. This class was sold to the Central of New Jersey in November 1911 as their class J-1 (220-224), joining the 20 engines of identical design purchased in 1902.

CNJ's superheater makeover (Locobase 5312) led to long service; the CNJ only scrapped them in July 1945.

Specifications by Steve Llanso of Sweat House Media
Locobase ID9078
RailroadLong Island
Number in Class5
Road Numbers20-24
Number Built5
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase14'
Engine Wheelbase31.67'
Ratio of driving wheelbase to overall engine wheebase 0.44
Overall Wheelbase (engine & tender)31.67'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers130365 lbs
Engine Weight188815 lbs
Tender Light Weight
Total Engine and Tender Weight188815 lbs
Tender Water Capacity2875 gals
Tender Fuel Capacity (oil/coal)5 tons
Minimum weight of rail (calculated)72 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"
Boiler Pressure200 psi
Cylinders (dia x stroke)18" x 26"
Tractive Effort22731 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.74
Heating Ability
Firebox Area137.40 sq. ft
Grate Area54.50 sq. ft
Evaporative Heating Surface1821 sq. ft
Superheating Surface
Combined Heating Surface1821 sq. ft
Evaporative Heating Surface/Cylinder Volume237.80
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10900
Same as above plus superheater percentage10900
Same as above but substitute firebox area for grate area27480
Power L16878
Power MT348.94

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