Danske Statsbaner 2-6-4 Locomotives in Denmark


Class Details by Steve Llanso of Sweat House Media

Class S (II) (Locobase 4029)

Data from WilliamBay, Danmarks Damplokomotiver (1977). Borsig built the first two in 1924 (works numbers were 11716-11717) and Frichs produced the other 18 in 1927-1928 (works numbers 69-86). See also [] for line drawing with dimensions.

The class ran mostly in northern Zeeland and Krstbane serving Copenhagen-area commuter and suburban service. Tonnage rating was 350 tons on the level at 85 km/h (53 mph).

Principal Dimensions by Steve Llanso of Middle Run Media

ClassS (II)
Locobase ID4029
RailroadDanske Statsbaner (DSB)
CountryDenmark
Whyte2-6-4T
Number in Class20
Road NumbersS 721-S 740
GaugeStd
Number Built20
BuilderFrichs
Year1924
Valve GearHeusinger
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.29 / 4.05
Engine Wheelbase (ft / m)37.57 / 11.45
Ratio of driving wheelbase to overall engine wheelbase 0.35
Overall Wheelbase (engine & tender) (ft / m)37.57 / 11.45
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)112,224 / 50,904
Engine Weight (lbs / kg)217,281 / 98,557
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)217,281 / 98,557
Tender Water Capacity (gals / ML)2640 / 10
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.40 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)62 / 31
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)68.10 / 1730
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)16.93" x 26.38" / 430x670
Tractive Effort (lbs / kg)16,421 / 7448.45
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.83
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)15.75 / 4.80
Firebox Area (sq ft / m2)138.80 / 12.90
Grate Area (sq ft / m2)25.82 / 2.40
Evaporative Heating Surface (sq ft / m2)1272 / 118.22
Superheating Surface (sq ft / m2)495 / 46
Combined Heating Surface (sq ft / m2)1767 / 164.22
Evaporative Heating Surface/Cylinder Volume185.06
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4493
Same as above plus superheater percentage5751
Same as above but substitute firebox area for grate area30,914
Power L118,449
Power MT1087.28

All material Copyright © SteamLocomotive.com
Wes Barris