Quebec, Montreal & Southern 4-6-0 Locomotives in Canada


Class Details by Steve Llanso of Sweat House Media

Class D-3 (Locobase 6646)

Data from 1913 QM & S locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

These ten-wheelers must have been among the first locomotives purchased after the D & H bought the Quebec Southern and renamed it the QM & S (see Locobase 6645). There were 7 D-3s (works #43702-08), but these two (43703 and 43708) were the only ones with 72" drivers; see Locobase 6647 for the 63" version.

The design's most obvious feature is the capacious Wootten firebox for burning culm, although MLW fitted a conventional cab on the boiler. By the time the Canadian National had bought the QM & S in 1929, 3 of the 7 had been retired. The others were designated H-2a and renumbered 1202-1205. They were withdrawn within two years.


Class D-3-B (Locobase 6647)

Data from 1913 QM & S locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

These ten-wheelers must have been among the first locomotives purchased after the D & H bought the Quebec Southern and renamed it the QM & S (see Locobase 6645). There were 8 D-3s (works #43702-09) including the one that went to the Napierville Junction (#43709); see Locobase 6646 for the two that ran on 72" drivers. Alco's works numbers for the 63"-ers ran 43702, 43704-43707.

The design's most obvious feature is the capacious Wootten firebox for burning culm, although MLW fitted a conventional cab on the boiler.

By the time the Canadian National had bought the QM & S in 1929, 3 of the 7 had been retired. The others were designated H-2a and renumbered 1202-1205. They were withdrawn within two years.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassD-3D-3-B
Locobase ID6646 6647
RailroadQuebec, Montreal & SouthernQuebec, Montreal & Southern
CountryCanadaCanada
Whyte4-6-04-6-0
Number in Class26
Road Numbers201, 206200, 202-205, 207
GaugeStdStd
Number Built26
BuilderMontreal LWMontreal LW
Year19071907
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.5715 / 4.57
Engine Wheelbase (ft / m)26.42 / 8.0526.42 / 8.05
Ratio of driving wheelbase to overall engine wheelbase 0.57 0.57
Overall Wheelbase (engine & tender) (ft / m)59 / 17.9859 / 17.98
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)148,000 / 67,132148,000 / 67,132
Engine Weight (lbs / kg)191,700 / 86,954191,780 / 86,990
Tender Loaded Weight (lbs / kg)143,450 / 65,068148,067 / 67,162
Total Engine and Tender Weight (lbs / kg)335,150 / 152,022339,847 / 154,152
Tender Water Capacity (gals / ML)6800 / 25.766800 / 25.76
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)14 / 1314 / 13
Minimum weight of rail (calculated) (lb/yd / kg/m)82 / 4182 / 41
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72 / 182963 / 1600
Boiler Pressure (psi / kPa)200 / 13.80200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)21" x 26" / 533x66021" x 26" / 533x660
Tractive Effort (lbs / kg)27,073 / 12280.1230,940 / 14034.16
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.47 4.78
Heating Ability
Tubes (number - dia) (in / mm)308 - 2" / 51308 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)15 / 4.5715 / 4.57
Firebox Area (sq ft / m2)178.40 / 16.58178.40 / 16.58
Grate Area (sq ft / m2)84.85 / 7.8984.85 / 7.89
Evaporative Heating Surface (sq ft / m2)2584 / 240.152584 / 240.15
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2584 / 240.152584 / 240.15
Evaporative Heating Surface/Cylinder Volume247.98247.98
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation16,97016,970
Same as above plus superheater percentage16,97016,970
Same as above but substitute firebox area for grate area35,68035,680
Power L180067005
Power MT357.77313.04

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