Thurso & Nation Valley 2-6-2 "Prairie" Type Locomotives

Class 2 (Locobase 4862)

The TNV was a logging railroad built east of Ottawa to exploit the hardwood forests. Construction began in 1925 and this engine was the second to serve the railway and the first bought new. She had only one engineer -- Park Smith -- from service entry to her sale in 1947.

According to the TNV website -- http://www.railways.incanada.net/thurso/tnvrhist.htm -- "[#2] worked mainly on the southern part of the line below Singer. A normal 12 hour day would consist of a trip to Singer, mile 26, with the empties and a return with the loads. It would then switch the Thurso yard. In this work it would burn between 6 and 7 tons of coal (in those days costing $14.00 per ton) and would evaporate 10,000 gallons of water." Repairs to the firebox by the Canadian Pacific shops in 1945 prompted an admonition to engineer Smith that "great care be taken this year not to leave any dead clinkers in the firebox etc, which through a period of time cause much corrosion".

#2 was sold in 1947 to Montreal Coke and Manufacturing Company at Lasalle, Quebec.

Specifications
Class2
Locobase ID4862
RailroadThurso & Nation Valley
Whyte2-6-2
Road Numbers2
GaugeStd
BuilderMontreal LW
Year1927
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase9'
Engine Wheelbase24'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)45.62'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers98400 lbs
Engine Weight125000 lbs
Tender Light Weight87250 lbs
Total Engine and Tender Weight212250 lbs
Tender Water Capacity
Tender Fuel Capacity (oil/coal)
Minimum weight per yard of rail on which locomotive could run54.67 lb rail
Geometry Relating to Tractive Effort
Driver Diameter44"
Boiler Pressure180 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort24118 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Firebox Area
Grate Area23.50 sq. ft
Evaporative Heating Surface
Superheating Surface
Combined Heating Surface0
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4230
Same as above plus superheater percentage4230
Same as above but substitute firebox area for grate area0
Power L10
Power MT0

Credits

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

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