Locke & Co 0-4-0 Locomotives in Canada

Class Details by Steve Llanso of Sweat House Media

Class St Johns (Locobase 16552)

Data from "Locke & Co., Ltd", Locomotives Manufactured by Messrs Kitson & Co Ltd, Leeds. (Many thanks to Sam Eastwood, whose 4 December 2023 email solved the mystery Locobase laid out just below.)Works number 4738 was in 1910.

Locobase could find nothing about the owners of this four-coupled saddle tank. The engine's name suggests that they were located in Newfoundland's capital city, but Locobase can't corroborate that.

Given the locomotive's size and key power details, perhaps Locke was a mining or logging entity.

More than two years after Locobase submitted this entry, Sam Eastwood sent the following highly illuminating information:

"'Locke & co'" was a mining company in Normanton, England, not Canada, owned by Joseph Locke. He owned a few collieries in the area. Kitson 4738 worked at St Johns colliery just to the west of Normanton as their No3".

Principal Dimensions by Steve Llanso of Sweat House Media

ClassSt Johns
Locobase ID16552
RailroadLocke & Co
Number in Class1
Road Numbers3
Number Built1
BuilderKitson & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)6 / 1.83
Engine Wheelbase (ft / m)6 / 1.83
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)6 / 1.83
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)58,576 / 26,570
Engine Weight (lbs / kg)58,756 / 26,651
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)58,756
Tender Water Capacity (gals / ML)996 / 3.77
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.85 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)49 / 24.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)38.50 / 978
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)14" x 21" / 356x533
Tractive Effort (lbs / kg)12,722 / 5770.61
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.60
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)43 / 3.99
Grate Area (sq ft / m2) 8.75 / 0.81
Evaporative Heating Surface (sq ft / m2)413 / 38.37
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)413 / 38.37
Evaporative Heating Surface/Cylinder Volume110.43
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1225
Same as above plus superheater percentage1225
Same as above but substitute firebox area for grate area6020
Power L11508
Power MT113.51

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