Landquart-Davos / Rhaetia Articulated Locomotives in Switzerland


Class Details by Steve Llanso of Sweat House Media

Class G 2/2 + 2/2 (Locobase 12745)

Data from [], last accessed 21 June 2011. Rhatische Bahn history at [] and from [], last accessed 30 December 2006. Works numbers were 1613-1614.

The L-D paid 68,4000 Swiss Francs of these two engines and operated them on the steep grades for decades. In 1895, the Landquart-Davos changed its name to the Rhaetia Bahn and the engines were numbered 21-22.

After almost 20 years of service, the RB replaced the boiler and added a leading truck to the pair; the result is seen in locobase 12746.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassG 2/2 + 2/2
Locobase ID12745
RailroadLandquart-Davos / Rhaetia
CountrySwitzerland
Whyte0-4-4-0T
Number in Class2
Road Numbers21-22
GaugeMetre
Number Built2
BuilderMaffei
Year1891
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.50 / 1.60
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg) / 10,125
Weight on Drivers (lbs / kg)89,287 / 40,500
Engine Weight (lbs / kg)89,287 / 40,500
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)89,287 / 40,500
Tender Water Capacity (gals / ML)792 / 3
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.30 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)37 / 18.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41.30 / 1050
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)12.99" x 21.65" / 330x550
Low Pressure Cylinders (dia x stroke) (in / mm)19.29" x 21.65" / 490x550
Tractive Effort (lbs / kg)18,002 / 8165.58
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.96
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)15.06 / 1.40
Evaporative Heating Surface (sq ft / m2)863 / 80.20
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)863 / 80.20
Evaporative Heating Surface/Cylinder Volume259.87
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2620
Same as above plus superheater percentage2620
Same as above but substitute firebox area for grate area
Power L1
Power MT

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