Boston & Maine 2-6-0 "Mogul" Type Locomotives

Class B-15 (Locobase 806)

Typical turn-of-the-century Mogul. 137 built for the B & M by Manchester (in Massachusetts) and Schenectady (Alco). These engines operated on secondary lines until diesels superseded them in the 1950s. Many were rebuilt with piston valves, cast tender trucks, steel cab, cross-compound airpump, and centered headlight. But they kept the inside valve gear.

Class B-15b/c - superheated (Locobase 6628)

Data from 1927 and 1947 Boston & Maine Description of Locomotives books supplied in May 2005 by Allen Stanley from his extensive collection.

In the late 'teens, the B & M began superheating their B-15s (described in Locobase 806). Unfortunately, none of the B&M books in Stanley's possession show a separate value for the superheater area.

Specifications
ClassB-15B-15b/c - superheated
Locobase ID8066628
RailroadBoston & MaineBoston & Maine
Whyte2-6-02-6-0
Road Numbers1360-14991360-1499
GaugeStdStd
BuilderSeveralshops
Year19001918
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase15'15'
Engine Wheelbase22.75'22.75'
Ratio of driving wheelbase to overall engine wheebase 0.66 0.66
Overall Wheelbase (engine & tender)51.17'51.17'
Axle Loading (Maximum Weight per Axle)40934 lbs45900 lbs
Weight on Drivers127000 lbs128000 lbs
Engine Weight145000 lbs150000 lbs
Tender Light Weight70890 lbs70890 lbs
Total Engine and Tender Weight215890 lbs220890 lbs
Tender Water Capacity5000 gals5000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight per yard of rail on which locomotive could run70.56 lb rail71.11 lb rail
Geometry Relating to Tractive Effort
Driver Diameter63"63"
Boiler Pressure200 psi200 psi
Cylinders (dia x stroke)19" x 26"19" x 26"
Tractive Effort25327 lbs25327 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.01 5.05
Heating Ability
Firebox Area
Grate Area30.30 sq. ft30.30 sq. ft
Evaporative Heating Surface18921446
Superheating Surface
Combined Heating Surface18921446
Evaporative Heating Surface/Cylinder Volume221.75169.48
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation60606060
Same as above plus superheater percentage60606060
Same as above but substitute firebox area for grate area00
Power L100
Power MT00

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.

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