Data from [] (June 2002).
John Oxlade's [] notes this is an Einheitslok (in this case for switching), one of a series of standard locomotive designs. Tonnage rating was 1,785 tons on the level at 40km/h (25 mph).
According to the Fleischmann locomotive model website -- [] (visited 11 April 2004) -- the design offered good springing and compensation and was very popular with its crews. Even so, only 10 were built, all in 1928. Plans to add to the class in 1939 were overtaken by the Third Reich's entry into World War II. All survived the war and served until being displaced by diesels in the 1960s.
Data from Albert Gieseler's website at [] . LKM works numbers were 16501-16511 in 1950 and 30011-30021 in 1951-1952.
In 1961, the East German Railways' shop at Gorlitz modified the pair by fitting superheated boilers; see Locobase 13804.
When the DDR converted to diesel, the 99 333 was scrapped. The 99 332 was preserved for static display at the BSderbahn Molli, a museum railroad in Mecklenberg-Western Pomerania. And the 99 331 is operational in a backup role.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | BR 81 | K44.8 /99 33 |
Locobase ID | 4327 | 15324 |
Railroad | Deutsche Reichsbahn | Deutsches Reichsbahn |
Country | Germany | East Germany |
Whyte | 0-8-0T | 0-8-0T |
Number in Class | 10 | 21 |
Road Numbers | BR 81 001-81 010 | 99 333 |
Gauge | Std | 90 cm |
Number Built | 10 | 21 |
Builder | Hanomag | LKM Babelsberg |
Year | 1928 | 1950 |
Valve Gear | Heusinger | Heusinger |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 13.78 / 4.20 | 9.84 / 3 |
Engine Wheelbase (ft / m) | 13.78 / 4.20 | 9.84 / 3 |
Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 9.84 / 3 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 37,479 / 17,000 | 17,857 / 8100 |
Weight on Drivers (lbs / kg) | 148,812 / 67,500 | 71,430 / 32,400 |
Engine Weight (lbs / kg) | 148,812 / 67,500 | 71,430 / 32,400 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | ||
Tender Water Capacity (gals / ML) | 2100 / 7.95 | 898 / 3.40 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 | 2.40 / 2 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 62 / 31 | 30 / 15 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 43.30 / 1100 | 31.50 / 800 |
Boiler Pressure (psi / kPa) | 203 / 1400 | 203.10 / 1400 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19.69" x 21.65" / 500x550 | 14.57" x 15.75" / 370x400 |
Tractive Effort (lbs / kg) | 33,448 / 15171.78 | 18,324 / 8311.64 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.45 | 3.90 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 114 - 1.77" / 45 | 150 - 1.772" / 45 |
Flues (number - dia) (in / mm) | 32 - 4.65" / 118 | |
Flue/Tube length (ft / m) | 11.48 / 3.50 | 8.53 / 2.60 |
Firebox Area (sq ft / m2) | 82.85 / 7.70 | 65.01 / 6.04 |
Grate Area (sq ft / m2) | 19.58 / 1.82 | 17.22 / 1.60 |
Evaporative Heating Surface (sq ft / m2) | 1023 / 95.07 | 608 / 56.44 |
Superheating Surface (sq ft / m2) | 366 / 34.01 | |
Combined Heating Surface (sq ft / m2) | 1389 / 129.08 | 608 / 56.44 |
Evaporative Heating Surface/Cylinder Volume | 134.08 | 200.05 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 3975 | 3497 |
Same as above plus superheater percentage | 5008 | 3497 |
Same as above but substitute firebox area for grate area | 21,191 | 13,204 |
Power L1 | 9084 | 3273 |
Power MT | 538.31 | 404.07 |