London & South Western 2-2-0 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class 736 (Locobase 10591)

Data from "Steam Rail Motor Coaches", The Locomotive Magazine, Vol XII (15 November 1906), p. 186.

Like the 1903 version, this rail motor design featured the water-tube firebox design designed by Dugald Drummond. The firebox had 73 sq ft of heating surface and the 99 water tubes contributed an additional 119 sq ft

Unlike the 1903 motors, however, Drummond specifically designed this engine as a detachable power unit. Its outside cylinders drove on the bogie's rear wheels. The coach portion were of the vestibule and came as a double set. That is, the assembly had a stubby locomotive and two cars coupled through a central connection. The near car had 49 non-smoking seats and 16 smoking seats. The rear car had a guard's and luggage compartment, 32 non-smoking seats, and 16 smoking seats.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10591
RailroadLondon & South Western
CountryGreat Britain
Number in Class
Road Numbers
Number Built
BuilderNine Elms
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)8 / 2.44
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)53,760 / 24,385
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)580 / 2.20
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 914
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)10" x 14" / 254x356
Tractive Effort (lbs / kg)4958 / 2248.91
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)216 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)192 / 17.84
Grate Area (sq ft / m2) 9.50 / 0.88
Evaporative Heating Surface (sq ft / m2)571 / 53.07
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)571 / 53.07
Evaporative Heating Surface/Cylinder Volume448.68
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1425
Same as above plus superheater percentage1425
Same as above but substitute firebox area for grate area28,800
Power L110,827
Power MT

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