Vienna exhibition 2-4-0 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 9965)

Data from Robert Henry Thurston, Reports of the Commissioners of the United States to the International Exhibition Held at Vienna, 1873 (Washington, DC: USGPO, 1876), p 61. See also W H Maw and William Dredge, "Locomotives", Reports on the Vienna Universal Exhibition, Part II (London: George Eyre and William Spottiswoode, 1874), p. 399.

The commissioners didn't say if this locomotive went into service with any particular operator, but complimented the builder (later known as Peckett) on the locomotive's "good workmanship and apparently of excellent material. The design is in each case neat, and the engines seem well fitted for doing good work."

Her Majesty's representatives Maw and Dredge agreed on the "very neat" design. They commented in particular in the firm's adoption of "...the American practice of making their connecting and coupling rod brasses so that they cover the ends of the crank pins and to a great extent exclude dust from the bearings."

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID9965
RailroadVienna exhibition
CountryGreat Britain
Number in Class1
Road Numbers
Number Built1
BuilderFox Walker & Co
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)6 / 1.83
Engine Wheelbase (ft / m)11 / 3.35
Ratio of driving wheelbase to overall engine wheelbase 0.55
Overall Wheelbase (engine & tender) (ft / m)11 / 3.35
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)26,880 / 12,193
Engine Weight (lbs / kg)40,320 / 18,289
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)40,320 / 18,289
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)22 / 11
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 914
Boiler Pressure (psi / kPa)120 / 8.30
High Pressure Cylinders (dia x stroke) (in / mm)10" x 18" / 254x457
Tractive Effort (lbs / kg)5100 / 2313.32
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.27
Heating Ability
Tubes (number - dia) (in / mm)96 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.17 / 2.49
Firebox Area (sq ft / m2)47.16 / 4.38
Grate Area (sq ft / m2) 7.50 / 0.70
Evaporative Heating Surface (sq ft / m2)406 / 37.73
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)406 / 37.73
Evaporative Heating Surface/Cylinder Volume248.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation900
Same as above plus superheater percentage900
Same as above but substitute firebox area for grate area5659
Power L12824
Power MT463.23

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