Liskeard & Looe 2-4-0 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class Lady Margaret (Locobase 10627)

Data from "Liskeard & Looe Ry," The Locomotive Magazine, Vol XIII (15 October 1907), pp. 184.

This was the last of the LLR's purchases before it was merged into the Great Western in 1909. (The LLR had taken over the operation of the mineral line Looe & Caradon in 1895.) Lady Margaret was a passenger engine and ran between the two named towns. By 1907, the total rail mileage over which the LM ran was 23. The LM had a average-sized boiler for the work it was called to do, but its firebox had more heating surface than usual.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassLady Margaret
Locobase ID10627
RailroadLiskeard & Looe
CountryGreat Britain
Number in Class1
Road Numbers
Number Built1
BuilderAndrew Barclay
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)18.37 / 5.60
Engine Wheelbase (ft / m)18.37 / 5.60
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)41.17 / 12.55
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)62,720 / 28,449
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)62,720 / 28,449
Tender Water Capacity (gals / ML)672 / 2.55
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)14.5" x 22" / 368x559
Tractive Effort (lbs / kg)13,106 / 5944.79
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)68.50 / 6.37
Grate Area (sq ft / m2)11.60 / 1.08
Evaporative Heating Surface (sq ft / m2)651 / 60.50
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)651 / 60.50
Evaporative Heating Surface/Cylinder Volume154.83
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1856
Same as above plus superheater percentage1856
Same as above but substitute firebox area for grate area10,960
Power L13024
Power MT

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