DRG Class 84

Specifications
Specifications
Configuration:;
• Whyte	2-10-2T
• UIC	1′E1′ h3t; 1′E1′ h2t †;
• German	Gt 57.18
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	0,850 mm (2 ft 9+1⁄2 in)
Driver dia.	1,400 mm (4 ft 7+1⁄8 in)
Trailing dia.	0,850 mm (2 ft 9+1⁄2 in)
Minimum curve	100 m (330 ft)
Wheelbase:
• Axle spacing; (Asymmetrical)	2,550 mm (8 ft 4+3⁄8 in) +; 1,650 mm (5 ft 5 in) +; 1,650 mm (5 ft 5 in) +; 1,650 mm (5 ft 5 in) +; 1,650 mm (5 ft 5 in) +; 2,250 mm (7 ft 4+5⁄8 in) =; 11,700 mm (38 ft 4+5⁄8 in); 2,692 mm (8 ft 10 in) + †; 1,708 mm (5 ft 7+1⁄4 in) +; 1,700 mm (5 ft 6+7⁄8 in) +; 1,700 mm (5 ft 6+7⁄8 in) +; 1,708 mm (5 ft 7+1⁄4 in) +; 2,692 mm (8 ft 10 in) =; 12,200 mm (40 ft 3⁄8 in) †;
Length:;
• Over headstocks	14,250 mm (46 ft 9 in); 14,650 mm (48 ft 3⁄4 in) †;
• Over buffers	15,550 mm (51 ft 1⁄4 in); 15,950 mm (52 ft 4 in) †;
Height	4,550 mm (14 ft 11+1⁄8 in)
Axle load	18.3 t (18.0 long tons; 20.2 short tons); 18.0 t (17.7 long tons; 19.8 short tons) †;
Adhesive weight	91.3 t (89.9 long tons; 100.6 short tons); 89.7 t (88.3 long tons; 98.9 short tons) †;
Empty weight	100.5 t (98.9 long tons; 110.8 short tons); 100.9 t (99.3 long tons; 111.2 short tons) †;
Service weight	125.5 t (123.5 long tons; 138.3 short tons); 125.2 t (123.2 long tons; 138.0 short tons) †;
Fuel type	Coal
Fuel capacity	3 tonnes (3.0 long tons; 3.3 short tons)
Water cap.	14 m3 (3,080 imp gal; 3,700 US gal)
Firebox:
• Grate area	3.76 m2 (40.5 sq ft)
Boiler:;
• Pitch	3,100 mm (10 ft 2 in)
• Tube plates	4,700 mm (15 ft 5 in)
• Small tubes	51 mm (2 in), 158 off
• Large tubes	133 mm (5+1⁄4 in), 48 off
Boiler pressure	20 bar (20.4 kgf/cm2; 290 psi); 16 bar (16.3 kgf/cm2; 232 psi) ‡;
Heating surface:
• Firebox	14.2 m2 (153 sq ft)
• Tubes	107.3 m2 (1,155 sq ft)
• Flues	88.6 m2 (954 sq ft)
• Total surface	210.1 m2 (2,261 sq ft)
Superheater:;
• Heating area	85.0 m2 (915 sq ft)
Cylinders	Three; Two, outside †;
Cylinder size	480 mm × 660 mm (18+7⁄8 in × 26 in); 600 mm × 660 mm (23+5⁄8 in × 26 in) †; 500 mm × 660 mm (19+11⁄16 in × 26 in) ‡;
Valve gear	Heusinger (Walschaerts)

Type and origin
Type and origin
Power type	Steam
Builder	84 001–002: Berliner Maschinenbau; 84 003–004: Orenstein & Koppel †; 84 005–012: Berliner Maschinenbau ‡;
Build date	1935–1937
Total produced	12

DRG Class 84
DRG Class 84
	Works photograph of 84 0001
Power type
Type and origin
Power type	Steam
Builder	84 001–002: Berliner Maschinenbau; 84 003–004: Orenstein & Koppel †; 84 005–012: Berliner Maschinenbau ‡;
Build date	1935–1937
Total produced	12
Configuration:;
Specifications
Configuration:;
• Whyte	2-10-2T
• UIC	1′E1′ h3t; 1′E1′ h2t †;
• German	Gt 57.18
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	0,850 mm (2 ft 9+1⁄2 in)
Driver dia.	1,400 mm (4 ft 7+1⁄8 in)
Trailing dia.	0,850 mm (2 ft 9+1⁄2 in)
Minimum curve	100 m (330 ft)
Wheelbase:
• Axle spacing; (Asymmetrical)	2,550 mm (8 ft 4+3⁄8 in) +; 1,650 mm (5 ft 5 in) +; 1,650 mm (5 ft 5 in) +; 1,650 mm (5 ft 5 in) +; 1,650 mm (5 ft 5 in) +; 2,250 mm (7 ft 4+5⁄8 in) =; 11,700 mm (38 ft 4+5⁄8 in); 2,692 mm (8 ft 10 in) + †; 1,708 mm (5 ft 7+1⁄4 in) +; 1,700 mm (5 ft 6+7⁄8 in) +; 1,700 mm (5 ft 6+7⁄8 in) +; 1,708 mm (5 ft 7+1⁄4 in) +; 2,692 mm (8 ft 10 in) =; 12,200 mm (40 ft 3⁄8 in) †;
Length:;
• Over headstocks	14,250 mm (46 ft 9 in); 14,650 mm (48 ft 3⁄4 in) †;
• Over buffers	15,550 mm (51 ft 1⁄4 in); 15,950 mm (52 ft 4 in) †;
Height	4,550 mm (14 ft 11+1⁄8 in)
Axle load	18.3 t (18.0 long tons; 20.2 short tons); 18.0 t (17.7 long tons; 19.8 short tons) †;
Adhesive weight	91.3 t (89.9 long tons; 100.6 short tons); 89.7 t (88.3 long tons; 98.9 short tons) †;
Empty weight	100.5 t (98.9 long tons; 110.8 short tons); 100.9 t (99.3 long tons; 111.2 short tons) †;
Service weight	125.5 t (123.5 long tons; 138.3 short tons); 125.2 t (123.2 long tons; 138.0 short tons) †;
Fuel type	Coal
Fuel capacity	3 tonnes (3.0 long tons; 3.3 short tons)
Water cap.	14 m3 (3,080 imp gal; 3,700 US gal)
Firebox:
• Grate area	3.76 m2 (40.5 sq ft)
Boiler:;
• Pitch	3,100 mm (10 ft 2 in)
• Tube plates	4,700 mm (15 ft 5 in)
• Small tubes	51 mm (2 in), 158 off
• Large tubes	133 mm (5+1⁄4 in), 48 off
Boiler pressure	20 bar (20.4 kgf/cm2; 290 psi); 16 bar (16.3 kgf/cm2; 232 psi) ‡;
Heating surface:
• Firebox	14.2 m2 (153 sq ft)
• Tubes	107.3 m2 (1,155 sq ft)
• Flues	88.6 m2 (954 sq ft)
• Total surface	210.1 m2 (2,261 sq ft)
Superheater:;
• Heating area	85.0 m2 (915 sq ft)
Cylinders	Three; Two, outside †;
Cylinder size	480 mm × 660 mm (18+7⁄8 in × 26 in); 600 mm × 660 mm (23+5⁄8 in × 26 in) †; 500 mm × 660 mm (19+11⁄16 in × 26 in) ‡;
Valve gear	Heusinger (Walschaerts)
Maximum speed
Performance figures
Maximum speed	70 km/h (43 mph); 80 km/h (50 mph) ‡;
Indicated power	1,425 PS (1,050 kW; 1,410 hp)
Operators
Career
Operators	Deutsche Reichsbahn
Numbers	84 001 – 84 012
Retired	1968

The German DRG Class 84s were standard (see Einheitsdampflokomotive) goods train tank locomotives with the Deutsche Reichsbahn. A total of twelve engines were placed into service by the Reichsbahn between 1935 and 1937. The machines were given operating numbers 84 001–012. They were worked on the Müglitz Valley Railway (Müglitztalbahn) between Heidenau and Altenberg in the Ore Mountains (Erzgebirge), for which they were specially designed to negotiate tight curves. They were manufactured by the firms of Berliner Maschinenbau and Orenstein & Koppel. One feature was that they were Berliner-built locomotives were fitted with Schwartzkopff-Eckhardt II bogies, while the O&K-built had Luttermöller axles.

In the Second World War many of the engines were damaged and had to be sidelined as a result. The vehicles were taken over by the DR in East Germany after the war. The engines were mainly used between Schwarzenberg and Johanngeorgenstadt.

The entire class was withdrawn between 1966 and 1968 apart from one, and all were scrapped.

References

Hütter, Ingo (2021). Die Dampflokomotiven der Baureihen 60 bis 91 der DRG, DRB, DB, und DR (in German). Werl: DGEG Medien. pp. 262–265. ISBN 978-3-946594-21-5.
Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1978). Dampflokomotiven deutscher Eisenbahnen, Baureihe 60–96 (EFA 1.3) (in German) (4th ed.). Düsseldorf: Alba. pp. 109–113, 241–242. ISBN 3-87094-083-2.

External links

Einheitslok Baureihe 84 Müglitztalbahn

v t e Classes of Deutsche Reichsbahn locomotives
Express train tender locomotives	01 01.10 02 02.1 H 02.10 03 03.10 04 05 06 19.10
Passenger train tender locomotives	23 24
Goods train tender locomotives	41 42 43 44 45 50 52 56.2–8
Express train tank locomotives	61
Passenger train tank locomotives	62 64 71.0
Goods train tank locomotives	80 81 84 85 86 87 89.0
Rack railway, branch line & narrow gauge locomotives	97.5 98.10 98.11 99.19 99.21 99.22 99.31 99.32 99.73–76
Electric locomotives	E 04 E 05 E 06.1 E 15 E 16 E 16.5 E 17 E 18 E 19 E 21 E 21.5 E 44 E 60 E 63 E 75 E 77 E 80 E 91 E 93 E 94 E 95 E 178 E 244
Diesel locomotives	V 3001 V 3201 V 3601 V 3602 V 3801 Kö I Köf II
Railbuses and multiple units	ET 25 ET 25.1 ET 31 ET 41 ET 51 ET 51.1 ET 55 ET 65 ET 82 ET 85 ET 87 ET 89 ET 91 SVT 125 SVT 137 ET 165 ET 166 ET 167 ET 168 ET 169 ET 171 SVT 877 Wismar
State railway locomotive lists	Baden Bavaria Mecklenburg Oldenburg Palatinate Prussia Saxony Württemberg

DRG Class 84

See also

References

External links