Roskilde 4-2-0 Locomotives in Denmark

Class Details by Steve Llanso of Sweat House Media

Class Roeskilde (Locobase 3963)

Data from William Bay, Danmarks Damplokomotiver (1977). Class information from [].

Photos on the Danish Damplokomotiver hos DSB ([]) website show a Crampton-type engine with relatively tall drivers. According to, the engines were actually built by Thomas Crampton at Tulk & Ley in 1849.

By the time they came to the Roskilde, they were so clapped out that they were retired in 1864-1867.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID3963
Number in Class4
Road Numbers12-15
Number Built4
BuilderR & W Hawthorn
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)13.67
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)25,089 / 11,380
Engine Weight (lbs / kg)58,017 / 26,316
Tender Loaded Weight (lbs / kg)25,089 / 11,380
Total Engine and Tender Weight (lbs / kg)83,106 / 37,696
Tender Water Capacity (gals / ML)1584 / 6
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.40 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)42 / 21
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)73.50 / 1829
Boiler Pressure (psi / kPa)101.50 / 7
High Pressure Cylinders (dia x stroke) (in / mm)15" x 22.01" / 381x559
Tractive Effort (lbs / kg)5813 / 2636.74
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.32
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)13.99 / 1.30
Evaporative Heating Surface (sq ft / m2)834 / 77.51
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)834 / 77.51
Evaporative Heating Surface/Cylinder Volume185.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1420
Same as above plus superheater percentage1420
Same as above but substitute firebox area for grate area
Power L1
Power MT

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