Raritan River 4-6-2 "Pacific" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 15 (Locobase 12847)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 53, p. 402. Works number was 44064 in September 1916.

This was a freight Pacific, a type rarely encountered. It wasn't overendowed with firebox heating surface area, even when one includes the 18.8 sq ft (1.75 sq m) in three arch tubes.

It served the RRRR for over 30 years until it wrecked in October 1948 near the Pennsylvania Railroad interchange.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12847
RailroadRaritan River
Number in Class1
Road Numbers15
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase11.67'
Engine Wheelbase30.25'
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender)61.68'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers112000 lbs
Engine Weight172000 lbs
Tender Light Weight130000 lbs
Total Engine and Tender Weight302000 lbs
Tender Water Capacity7000 gals
Tender Fuel Capacity (oil/coal)12 tons
Minimum weight of rail (calculated)62 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter61"
Boiler Pressure180 psi
Cylinders (dia x stroke)20" x 26"
Tractive Effort26085 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.29
Heating Ability
Firebox Area165.80 sq. ft
Grate Area44.80 sq. ft
Evaporative Heating Surface2829 sq. ft
Superheating Surface
Combined Heating Surface2829 sq. ft
Evaporative Heating Surface/Cylinder Volume299.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation8064
Same as above plus superheater percentage8064
Same as above but substitute firebox area for grate area29844
Power L17081
Power MT418.15

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