DRG Class 99.32

The Class 99.32 engines were standard steam locomotives (Einheitsdampflokomotiven) in service with the Deutsche Reichsbahn in Germany. The three examples built are still working today on the Bäderbahn Molli (Molli Spa Railway) between Bad Doberan and Kühlungsborn-West. A feature of the engines is the tapered driver's cab due to the restricted loading gauge of the upper section of the line. With a top speed of 50 km/h it is one of the fastest narrow gauge locomotive classes in the whole of Germany, however it cannot run at that speed on this particular route.

Class 99.32
Number(s)	DRG: 99 321 – 99 323 DR: 99 2321 – 99 2323 DBAG: 099 231 – 099 233 MBB: 99 2321 – 99 2324
Quantity	4
Manufacturer	Orenstein & Koppel (3) DLW Meiningen (1)
Year(s) of manufacture	1932 (3), 2008 (1)
Wheel arrangement	2-8-2T
Axle arrangement	1′D1′ h2t
Type	K 46.9
Track gauge	900 mm (2 ft 11 ^7⁄16 in)
Length over buffers	10,595 mm (34 ft 9 ^1⁄4 in)
Height	3,400 mm (11 ft 1 ^7⁄8 in)
Overall wheelbase	8,075 mm (26 ft 6 in)
Empty weight	35.15 tonnes (34.59 long tons; 38.75 short tons)
Service weight	43.68 tonnes (42.99 long tons; 48.15 short tons)
Adhesive weight	31.80 tonnes (31.30 long tons; 35.05 short tons)
Axle load	7.95 tonnes (7.82 long tons; 8.76 short tons)
Top speed	50 km/h (31 mph)
Indicated Power	338 kW (460 PS; 453 hp)
Starting tractive effort	59.33 kN (13,340 lbf)
Driving wheel diameter	1,100 mm (3 ft 7 ^1⁄4 in)
Leading wheel diameter	550 mm (1 ft 9 ^5⁄8 in)
Trailing wheel diameter	550 mm (1 ft 9 ^5⁄8 in)
Valve gear	outside Walschaerts (Heusinger)
No. of cylinders	Two, outside
Cylinder bore	380 mm (14 ^15⁄16 in)
Piston stroke	550 mm (21 ^5⁄8 in)
Boiler Overpressure	14 bar (1.40 MPa; 203 psi)
No. of heating tubes	4
No. of smoke tubes	69
Heating tube length	3,500 mm (11 ft 5 ^3⁄4 in)
Grate area	1.62 m^2 (17.4 sq ft)
Radiative heating area	5.80 m^2 (62.4 sq ft)
Tube heating area	54.74 m^2 (589.2 sq ft)
Superheater area	30.60 m^2 (329.4 sq ft)
Evaporative heating area	60.54 m^2 (651.6 sq ft)
Water capacity	4.25 m^3 (150 cu ft) or 4,250 litres (930 imp gal; 1,120 US gal)
Fuel	Coal: 1.7 tonnes (1.7 long tons; 1.9 short tons)

Together with the DRG Class 99.33s, they are the only steam locomotives on the Bäderbahn Molli. Because the small Wismut engines have a low tractive effort and top speed, the search for alternatives started. As a result, in 2009 a fourth Einheitslok was built in Dampflokwerk Meiningen.[1]

• 99 321 in service at Kühlungsborn West
• 99 322 in service at Kühlungsborn West
• 99 323 in service at Kühlungsborn West
• 99 324 in service at Kühlungsborn West

Literature

• Kieper, Klaus; Preuß, Reiner (1980). Schmalspurbahnarchiv. Berlin: transpress VEB Verlag für Verkehrswesen.
• Kieper, Klaus; Preuß, Reiner (1980). Schmalspur zwischen Ostsee und Erzgebirge. Düsseldorf: Alba Buchverlag. ISBN 3-87094-069-7.
• Obermayer, Horst J. (1971). Taschenbuch Deutsche Schmalspur-Dampflokomotiven. Stuttgart: Franckh. ISBN 3-440-03818-1.

See also

• List of DRG locomotives and railbuses

References

1. "Molli-Dampflok 99 2324-4: So dampft die Neugebaute" (in German). Bahndampf.de. 27 May 2020.