Bonhomie & Hattiesburg Southern 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 250 (Locobase 15319)

Data from DeGolyer Library of Southern Methodist University Baldwin Specifications, Vol 80, pp. 220+. Works number was 59239 in May 1926.

As the B&HS settled into its post-ICC working life, it acquired a few locomotives including this mixed-train Prairie. It used relative large 11" (279 mm) piston valves. It traveled over a gentle right of way that had 0.75% grades and nearly straight 4 degree (radii of 1,433 feet/436.8 metres).

Its post-revenue-service life began in 1963 when the 250 was sold to the Wanamaker, Kempton & Southern, which put it on display at the Edaville Railroad in Massachusetts. The 250 later moved to the Wolfeboro Railroad, where it is stored in Wolfeboro, NH.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15319
RailroadBonhomie & Hattiesburg Southern
Number in Class1
Road Numbers250
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase10.33'
Engine Wheelbase28.67'
Ratio of driving wheelbase to overall engine wheebase 0.36
Overall Wheelbase (engine & tender)55.37'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers110000 lbs
Engine Weight148000 lbs
Tender Light Weight115600 lbs
Total Engine and Tender Weight263600 lbs
Tender Water Capacity5500 gals
Tender Fuel Capacity (oil/coal)9 tons
Minimum weight of rail (calculated)61 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter52"
Boiler Pressure180 psi
Cylinders (dia x stroke)20" x 24"
Tractive Effort28246 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.89
Heating Ability
Firebox Area121 sq. ft
Grate Area29.50 sq. ft
Evaporative Heating Surface1684 sq. ft
Superheating Surface389 sq. ft
Combined Heating Surface2073 sq. ft
Evaporative Heating Surface/Cylinder Volume192.97
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5310
Same as above plus superheater percentage6319
Same as above but substitute firebox area for grate area25918
Power L110350
Power MT622.30

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