Temiskaming & Northern Ontario 4-8-4 Locomotives in Canada

The Ontario Northland Railway is owned by the Province of Ontario, Canada and its main line goes from North Bay to Hudson Bay. In 1936, this busy railway was feeling the pressure for more motive power and ordered four 4-8-4s (road numbers 1101 through 1104) from the Canadian Locomotive Works.

These locomotives were designed by the railway's own motive power department and were some of the lightest ever built, weighing only 371,320 pounds. They were styled with smoke deflectors and running board skirting and made a fine appearance on the head end of a passenger train.

The design included 69" drivers, 22.5 x 30 cylinders, a 275 psi boiler pressure and a tractive effort of 54,500 pounds.

There are no survivors.


Class Details by Steve Llanso of Sweat House Media

Class 1100 (Locobase 2295)

See "Temiskaming & Northern Ontario (Ontario Northland) 1100-1103" in Canadian Rail No 487 (March-April 2002), pp. 80-82 (including a reprint of an August 1936 report for Canadian Railway and Marine World.). Thanks to Chris Hohl for supplying a PDF of this CR issue on Canadian 4-8-4s. Works numbers were 1919-1920 in June 1937, 1921 in July, 1922 in August.

Like the TP&W H-10s, these Northerns are little known and far lighter than the average for the wheel arrangement. They were nonetheless big and powerful locomotives fitted, said the CRMW account, with the "last word in modern equipment." The long list included SKF roller bearings in all truck boxes, a Standard BK stoker, Nicholson thermic syphons, Dominion foundries and Steel nickel steel locomotive frames. The firebox heating surface area includes 91 sq ft (8.45 sq m) of arch tubes and thermic syphons.

The CR account noted that "the T and NOR ...was among the earliest users of the Franklin Supply Company locomotive booster in Canada ...[T]hat it regards the device favorably is evidenced by the fact that it has utilized them in its latest power." The booster increased starting tractive effort by 10,450 lb (4,740 kg or 46.5 kN).

They moved passenger trains along the T & NO's mainline from North Bay to Hudson Bay. In 1946, the T&NO was renamed Ontario Northland, although the numbering on these very northerly Northerns remained the same. All were taken out of service in 1956 when the ON was fully equipped with diesel.

Principal Dimensions by Steve Llanso of Middle Run Media
Class1100
Locobase ID2295
RailroadTemiskaming & Northern Ontario
CountryCanada
Whyte4-8-4
Number in Class5
Road Numbers1100-1104
GaugeStd
Number Built5
BuilderCanadian Locomotive Co
Year1937
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)18.50 / 5.64
Engine Wheelbase (ft / m)42.83 / 13.05
Ratio of driving wheelbase to overall engine wheelbase 0.43
Overall Wheelbase (engine & tender) (ft / m)82.25 / 25.07
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)218,210 / 98,979
Engine Weight (lbs / kg)371,320 / 168,428
Tender Loaded Weight (lbs / kg)281,500 / 127,686
Total Engine and Tender Weight (lbs / kg)652,820 / 296,114
Tender Water Capacity (gals / ML)13,750 / 52.08
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)20 / 18
Minimum weight of rail (calculated) (lb/yd / kg/m)91 / 45.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)69 / 1753
Boiler Pressure (psi / kPa)275 / 1900
High Pressure Cylinders (dia x stroke) (in / mm)22.5" x 30" / 572x762
Tractive Effort (lbs / kg)51,450 / 23337.36
Booster (lbs)10,450
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.24
Heating Ability
Tubes (number - dia) (in / mm)45 - 2.25" / 57
Flues (number - dia) (in / mm)149 - 3.5" / 89
Flue/Tube length (ft / m)21 / 6.40
Firebox Area (sq ft / m2)370 / 34.37
Grate Area (sq ft / m2)70.30 / 6.53
Evaporative Heating Surface (sq ft / m2)3777 / 350.89
Superheating Surface (sq ft / m2)1665 / 154.68
Combined Heating Surface (sq ft / m2)5442 / 505.57
Evaporative Heating Surface/Cylinder Volume273.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation19,333
Same as above plus superheater percentage25,326
Same as above but substitute firebox area for grate area133,293
Power L147,202
Power MT1907.57

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