Grand Trunk / Ottawa, Amprior & Parry Sound 4-4-2 Locomotives in Canada


Class Details by Steve Llanso of Sweat House Media

Class 619 / B-1 (Locobase 12356)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 22, p. 123. Works numbers were 16678-16679 in April 1899

Representing one of the few Canadian examples of the Atlantic wheel arrangement, 619-620 were delivered with a Vauclain compound cylinder arrangement fed by 13" (330 mm) piston valves. The order "Guaranteed to make an average speed of 70 miles per hour, stops and slow downs excluded. To run bet[ween] Montreal and Ottawa, a distance of 116 miles, in 2 hours 15 min. Max grade not exceeding 30 ft per mile."

Within months of their delivery, the OA & PS was transformed into the Canada Atlantic, which kept the road numbers. A modified Vauclain compound joined the pair in 1901; see Locobase 12357.

In 1905, the Grand Trunk began operating the CAR (although transfer wasn't approved until 1914), changing this pair's road numbers twice in five years. The 1500-1501 never gave up their Vauclain compound setup and were scrapped in March 1919.


Class K1/X-8-a (Locobase 15678)

Data from Canadian National Steam Locomotive Assorted locomotive diagrams supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange. (Thanks to Chris Hohl for his 21 September 2019 email correcting the railway's name as well as the typographical error in the locomotive's adhesion weight.)

These and the five "suburban" engines from 1892 shown in Locobase 6617 were home-built to the same design. This earlier set had the larger boiler, which probably held 191 tubes assuming that the firebox heating surface area was the same at 98 sq ft (9.1 sq m).

Although 1527 was given a CN designation and a road number (41), it was scrapped by the end of 1923.


Class K1/X-9-a (Locobase 6617)

Data from compendium of Canadian National locomotive diagrams compiled in 1953 and supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. (Thanks to Chris Hohl for his 21 September 2019 email correcting the railway's name.)

This was a small suburban tank engine built for the Toronto Belt Line Railway and rated at 509 HP by the GT in 1913 (see Description of Locomotives, supplied as well by Allen Stanley from his extensive Rail Data Exchange). The quintet shown here followed five from 1883 shown in Locobase 15678 and differed only in having fewer tubes in the boiler.

Most were scrapped in the 'teens. A few went on to enjoy other careers, like the three that wound up on the Thousand Islands Railway in 1927. The TIR began as a three-mile connection between Gananoque, Ontario on the St Lawrence and the GTR's main line. See the account of the TIR's development and growth at [], last accessed 6 September 2011.

By the time the CN gained title to the ex-X-9-a, they were close to the ends of their operating lives. 44, one of the three, is shown in the TIR account as having been scrapped in 1931.

Principal Dimensions by Steve Llanso of Sweat House Media

Class619 / B-1K1/X-8-aK1/X-9-a
Locobase ID12356 15678 6617
RailroadOttawa, Amprior & Parry Sound (CNR)Grand Trunk (CNR)Grand Trunk (CNR)
CountryCanadaCanadaCanada
Whyte4-4-24-4-2T4-4-2T
Number in Class255
Road Numbers619-620/1332-1333/1500-1501201-205/1526-1530/41206-210/1531-1535
GaugeStdStdStd
Number Built255
BuilderBurnham, Williams & CoGrand TrunkGrand Trunk
Year189918831892
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.75 / 2.068 / 2.448 / 2.44
Engine Wheelbase (ft / m)25.50 / 7.7729.25 / 8.9229.25 / 8.92
Ratio of driving wheelbase to overall engine wheelbase 0.26 0.27 0.27
Overall Wheelbase (engine & tender) (ft / m)52.50 / 1629.25 / 8.9229.25 / 8.92
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)63,224 / 28,67875,488 / 34,24169,496 / 31,523
Engine Weight (lbs / kg)147,896 / 67,085134,232 / 60,887128,632 / 58,347
Tender Loaded Weight (lbs / kg)120,000 / 54,431
Total Engine and Tender Weight (lbs / kg)267,896 / 121,516134,232128,632
Tender Water Capacity (gals / ML)6000 / 22.731836 / 6.951836 / 6.95
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)3 / 33 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)53 / 26.5063 / 31.5058 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)78 / 198163 / 160063 / 1600
Boiler Pressure (psi / kPa)200 / 13.80140 / 9.70150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)13" x 26" / 330x66017" x 22" / 432x55917" x 22" / 432x559
Low Pressure Cylinders (dia x stroke) (in / mm)22" x 26" / 559x660
Tractive Effort (lbs / kg)14,196 / 6439.2012,010 / 5447.6512,867 / 5836.38
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.45 6.29 5.40
Heating Ability
Tubes (number - dia) (in / mm)262 - 2" / 51173 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)15 / 4.5710.71 / 3.26
Firebox Area (sq ft / m2)171 / 15.8998 / 9.10
Grate Area (sq ft / m2)30.20 / 2.8117.86 / 1.6617.86 / 1.66
Evaporative Heating Surface (sq ft / m2)2232 / 207.431052 / 97.73944 / 87.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2232 / 207.431052 / 97.73944 / 87.70
Evaporative Heating Surface/Cylinder Volume559.28182.01163.32
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation604025002679
Same as above plus superheater percentage604025002679
Same as above but substitute firebox area for grate area34,20014,700
Power L170163908
Power MT489.30247.95

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