East Broad Top R & C 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 11 (Locobase 4215)

Data from "Recent Narrow Gage [sic] Locomotives for Heavy Service," Railroad Age Gazette, Vol XLV, No 12 (21 August 1908) article (pp. 755-758). Works number was 32664 in February 1908.

This pocket Prairie served both passenger and freight requirements on a Pennsylvania line that had curves of 17-deg radius. To gain the proper leverage, the main rod drove the rear set of drivers. RAG notes that "the boiler capacity is high in proportion to the tractive force" and concludes "... the design throughout is admirably adapted to the service required."

This engine stayed in service for 35 years before being scrapped in April 1943.

Specifications by Steve Llanso of Sweat House Media
Locobase ID4215
RailroadEast Broad Top R & C
Number in Class1
Road Numbers11
Number Built1
BuilderBurnham, Williams & Co
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase 9.50'
Engine Wheelbase21.50'
Ratio of driving wheelbase to overall engine wheebase 0.44
Overall Wheelbase (engine & tender)44.33'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers66180 lbs
Engine Weight89780 lbs
Tender Light Weight50220 lbs
Total Engine and Tender Weight140000 lbs
Tender Water Capacity2500 gals
Tender Fuel Capacity (oil/coal)5 tons
Minimum weight of rail (calculated)37 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter48"
Boiler Pressure160 psi
Cylinders (dia x stroke)16" x 22"
Tractive Effort15957 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.15
Heating Ability
Firebox Area91.80 sq. ft
Grate Area24 sq. ft
Evaporative Heating Surface1159 sq. ft
Superheating Surface
Combined Heating Surface1159 sq. ft
Evaporative Heating Surface/Cylinder Volume226.38
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3840
Same as above plus superheater percentage3840
Same as above but substitute firebox area for grate area14688
Power L14045
Power MT404.25

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