DRG Class 99.22

Class 99.22
99 222 at Brocken, August 2012
Number(s)
  • DRG: 99 221 – 99 223
  • DR from 1970: 99 7222-5
Quantity 3
Manufacturer Berliner Maschinenbau
Year(s) of manufacture 1931
Wheel arrangement 2-10-2T
Axle arrangement 1′E1′ h2t
Type K 57.10
Track gauge 1,000 mm (3 ft 3 3⁄8 in)
Length over buffers 11,636 mm (38 ft 2 in)
Height 3,650 mm (11 ft 11 11⁄16 in)
Width 2,550 mm (8 ft 4 3⁄8 in)
Wheelbase 4,800 mm (15 ft 9 in)
Overall wheelbase 8,700 mm (28 ft 6 1⁄2 in)
Empty weight 50.2 tonnes (49.4 long tons; 55.3 short tons)
Service weight 65.8 tonnes (64.8 long tons; 72.5 short tons)
Adhesive weight 50.5 tonnes (49.7 long tons; 55.7 short tons)
Top speed 40 km/h (25 mph)
Indicated Power 650–700 PS (480–510 kW; 640–690 hp)
Starting tractive effort 102.97 kN (23,150 lbf)
Driving wheel diameter 1,000 mm (3 ft 3 3⁄8 in)
Carrying wheel diameter 550 mm (1 ft 9 5⁄8 in)
No. of cylinders Two, outside
Cylinder bore 430 mm (16 15⁄16 in)
Piston stroke 400 mm (15 3⁄4 in)
Boiler Overpressure 14 bar (1.40 MPa; 203 psi)
No. of heating tubes 114
No. of smoke tubes 32
Heating tube length 3,500 mm (11 ft 5 3⁄4 in)
Grate area 1.78 m2 (19.2 sq ft)
Radiative heating area 7.7 m2 (83 sq ft)
Superheater area 33.3 m2 (358 sq ft)
Evaporative heating area 95.9 m2 (1,032 sq ft)
Water capacity 8 m3 (280 cu ft) or 8,000 litres (1,800 imp gal; 2,100 US gal)
Fuel Coal: 3 tonnes (3.0 long tons; 3.3 short tons)
Parking brake counterweight brake
Locomotive brakes vacuum-controlled compressed-air brake †
Train brakes originally K-P m.Z. and Schleifer driver's brake valve.
Hardy vacuum brake with auxiliary brake. †
KE-P m.Z. ‡
Couplers Janney centre buffer couplings
Features † from 1967
‡ from 1985

The three engines of DRG Class 99.22 were standard, narrow gauge locomotives (Einheitsloks) in service with the German Reichsbahn. They had operating numbers 99 221 to 99 223.

They were built and deployed for the railway line from Eisfeld to Schönbrunn. During the course of the Second World War, locomotives 99 221 and 99 223 went to the Thamshavnbanen copper ore line in Norway. After the end of the war they stayed there and were later scrapped. Locomotive 99 222 remained on duty until 1966 on its original route, but when it became clear that the end was nigh, it transferred to the Harz and is in service today on the network of the Harz Narrow Gauge Railways (Harzer Schmalspurbahnen or HSB) between Nordhausen, Quedlinburg and Wernigerode.

In its time the Class 99.22 was the most powerful of the German narrow gauge locomotives and had Bissel axles. In addition the coal tank tapered toward the back. One feature was the Janney automatic centre buffer coupling. After its transfer to the Harzquerbahn, 99 222 was converted to the normal compensating coupling with central buffer. This conversion can be clearly recognised by the cutouts in the buffer beam.

The locomotives had a Walschaerts valve gear driving the third axle.

On the introduction of the DR's new EDP numbering scheme in 1970 the engine was given operating number 99 7222, which she carries to this day because the HSB has retained the DR numbering from 1970.

The new DR Class 99.23-24 locomotives were built on the basis of the Einheitsloks. Differences in the new engines are the feedwater heater and the bar frame.

  • 99 221 last duties: Thamshavnbanen (Norway) - scrapped in 1953
  • 99 222 in service with the HSB
  • 99 223 last duties: Thamshavnbanen (Norway) - scrapped in 1947

See also

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