Thurso & Nation Valley 2-6-2 Locomotives in Canada


Class Details by Steve Llanso of Sweat House Media

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 -- [link] -- "[#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.

Principal Dimensions by Steve Llanso of Middle Run Media
Class2
Locobase ID4862
RailroadThurso & Nation Valley
CountryCanada
Whyte2-6-2
Number in Class1
Road Numbers2
GaugeStd
Number Built1
BuilderMontreal LW
Year1927
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.74
Engine Wheelbase (ft / m)24 / 7.32
Ratio of driving wheelbase to overall engine wheelbase 0.38
Overall Wheelbase (engine & tender) (ft / m)45.62 / 13.90
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)98,400 / 44,634
Engine Weight (lbs / kg)125,000 / 56,699
Tender Loaded Weight (lbs / kg)87,250 / 39,576
Total Engine and Tender Weight (lbs / kg)212,250 / 96,275
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)24,118 / 10939.75
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Tubes (number - dia) (in / mm)234 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.50 / 3.20
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)23.50 / 2.18
Evaporative Heating Surface (sq ft / m2)
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)
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 area
Power L1
Power MT

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