Sebasticook & Moosehead 0-4-4 "Forney" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 105/A (Locobase 16373)

Data from Steam Engine List compiled by R F Dole 2 January 1959 and Gene Connelly Roster, both supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange collection. Works number was 2807 in 1892.

Locobase added a 0-4-4T Forney tank as entry 10023. The extensive details available from the source didn't include the builder, built date, or railroad, so Locobase could only say that it was a typical example. Dole's data show that this Maine woods tank was very likely a sister, or at least a cousin, to Matthias Forney's eponymous archetype.

The S&M didn't operate the 105 for very long before trading it in 1896 to the Maine Central for Portland works number 189. (Also numbered 105, the Portland 4-4-0 was originally bought in 1871 for the Portland & Ogdensburg as their #5, rebuilt in May 1891.)

The MEC operated for amost 25 more years before scrapping it in January 1920.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID16373
RailroadSebasticook & Moosehead (MEC)
Number in Class
Road Numbers2/105/3
Number Built
BuilderRhode Island
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)23.08 / 7.03
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)23.08 / 7.03
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)62,600 / 28,395
Engine Weight (lbs / kg)96,600 / 43,817
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)96,600
Tender Water Capacity (gals / ML)1200 / 4.55
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)2 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 26
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)51 / 1295
Boiler Pressure (psi / kPa)145 / 10
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x508
Tractive Effort (lbs / kg)10,875 / 4932.82
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.76
Heating Ability
Tubes (number - dia) (in / mm)128 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.67 / 3.25
Firebox Area (sq ft / m2)70 / 6.50
Grate Area (sq ft / m2)14.20 / 1.32
Evaporative Heating Surface (sq ft / m2)780 / 72.46
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)780 / 72.46
Evaporative Heating Surface/Cylinder Volume190.71
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2059
Same as above plus superheater percentage2059
Same as above but substitute firebox area for grate area10,150
Power L13405
Power MT239.83

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Wes Barris