Rosenberger Kreibahn 0-6-0 Locomotives in Germany

Class Details by Steve Llanso of Sweat House Media

Class Elna type 4 nassdampf (Locobase 21150)

Data from "ELNA 4" in Wikipedia at [], last accessed 3 September 2023. Works number was 11687-11688,

Caveat: The following advice recognizes that reputable sources disagree on many points. Locobase has tried to identify a representative type for each ELNA. To see all the variants of the design, Locobase recommends three websites still active as of September 2023:

1) Albert Gieseler's Lokomotiv-Baureihen page at [] beginning with BR 92 (look for build dates between 1924-1945)

2) The ELNA screens at at [], whose subpages show all the locomotive identified as ELNAs.of a particular type.

3) Various Wikipedia sites using the term ELNA.

All ELNAs could be produced with either saturated boilers (nassdampf) or superheated boilers (heizdampf). Regardless of wheel arrangement or boiler type, all ELNA cylinders used the same 550 mm (21.65") stroke. The Type 4s shown here used saturated boilers; the two superheater Type 4s appear in Locobase 211449

Unlike most ELNAs, which had T-shaped water tanks behind the cab, O&K chose to put the water tanks in their usual places on the running boards in front of the cabs.

These two nassdampfers were the first locomotives to operate on the RKB after it converted its original 22-km (13.7 mile) segment between Rosenberg and Landsberg from a 750 mm (29.5") schmalspur to the standard gauge. They were the only two steam locomotives on the line.

One survivor of World War II action went on the East German Deutches Reich as their 89 954. Wikipedia comments (in google translation) that "the running properties of the locomotives were not satisfactory, which is why they were primarily used in shunting service. Nevertheless, the engine served the DRB from 1948-1966, when the DRB transferred it to a paper factory in Crossen

See Locobases 21142-21155 for the other ELNA types.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassElna type 4 nassdampf
Locobase ID21150
RailroadRosenberger Kreibahn
Number in Class2
Road Numbers1-2/
Number Built2
BuilderOrenstein & Koppel
Valve GearHeusinger
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.17 / 3.10
Engine Wheelbase (ft / m)10.17 / 3.10
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)10.17 / 3.10
Axle Loading (Maximum Weight per Axle) (lbs / kg)30,865 / 14,000
Weight on Drivers (lbs / kg)98,106 / 44,500
Engine Weight (lbs / kg)98,106 / 44,500
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)98,106 / 44,500
Tender Water Capacity (gals / ML)1452 / 5.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.70 / 1.50
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)47.20 / 1200
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)16.14" x 21.65" / 410x550
Tractive Effort (lbs / kg)17,672 / 8015.89
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.55
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.48 / 3.50
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)15.07 / 1.40
Evaporative Heating Surface (sq ft / m2)861 / 80
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)861 / 80
Evaporative Heating Surface/Cylinder Volume167.94
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2622
Same as above plus superheater percentage2622
Same as above but substitute firebox area for grate area
Power L1
Power MT

All material Copyright ©
Wes Barris