Bavarian B XI

Bavarian B XI DRG Class 36.7–8
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	B XI Zwilling (two-cylinder)	B XI Verbund (compound)
Numbering:	1201–1239 from 1926: DRG 36 701–708	1240–1339 from 1926: DRG 36 751–826
Quantity:	39	100
Manufacturer:	Maffei	Maffei, Krauss
Years of Manufacture:	1892–1893	1895–1900
Retirement:	by 1926	by 1931
Wheel arrangement:	0-4-0
Axle arrangement:	2'B n2	2'B n2v
Rail gauge:	1435 mm
Length over buffers:	15979¹ / 16885² mm	16986 mm
Wheel base incl. tender:	12895¹ / 13970² mm	14095 mm
Service weight:	50.4 t	51.0 / 51.5³ t
Adhesive weight:	28.5 t	28.8 / 29.6³ t
Axle load:	14.3 t	14.4 / 14.8³ t
Top speed:	90 km/h
Driving wheel diameter:	1870 mm
Leading wheel diameter:	1,006 mm
Valve gear:	Walschaerts (Heusinger), outside
No. of cylinders:	2
Cylinder bore:	430 mm	455/670 mm
Piston stroke:	610 mm
Boiler overpressure:	12 kg/cm² = 11.77 bar	13 kg/cm² = 12.75 bar
Grate area:	2.24 m²	2.26 m²
Evaporative heating area:	116.2 m²	116.8 m²
Tender:	bay 3 T 14.5 bay 2'2' T 18	bay 2'2' T 18
Tender service weight:	36.0 / 43.0 t	43.0 t
Water capacity:	14.5 / 18.0 m³	18.0 m³
Fuel capacity:	6.0 / 6.5 t coal	6.5 t coal
¹ with bay 3 T 14.5 tender ² with bay 2'2' T 18 tender ³ from no. 1318

The Class B XI engines of the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn) were built between 1895 and 1900 by the firm of Maffei for deployment in Bavaria. The first delivery comprised 39 vehicles with two-cylinder, saturated steam operation, a further 100 two-cylinder compound locomotives followed in the period up to 1900.

The Deutsche Reichsbahn took over 8 engines from the first batch as Class 36.7, with operating numbers 36 701 to 36 708, and 76 of the second batch, with numbers 36 751 to 36 826.

These steam locomotives were equipped with Bavarian 3 T 12, 3 T 14.5 and 2'2' T 18 tenders. These vehicles were the first locos that were give a four-axle tender.

Sources

de:Bayerische B XI

External links

There is a relevant English-language forum at Railways of Germany

Classes of Bavarian locomotive and railcars

Early locomotives	Adler Jupiter and Juno Vesta and Venus Vulkan and Mars Merkur and Diana A I A II A III A IV A V B I B II B III B IV B V B V (artic) C I C II

Passenger and express train locomotives	B VI B VII B VIII B IX (old) B IX B X B XI Zw B XI Vbd C V AA I S 2/5 (Vauclain) S 2/5 S 2/6 S 3/5 N S 3/5 H S 3/6 P 2/4 P 3/5 N P 3/5 H

Goods train locomotives	C II C III C IV Zw C IV Vbd C VI E I E I (Vauclain) BB I G 3/4 N G 3/4 H G 4/5 N G 4/5 H G 5/5

Tank locomotives	D I D II D II (old) D III D IV D V D IX D XII Pt 2/3 Pt 2/4 N Pt 2/4 H Pt 2/5 N Pt 2/5H Pt 3/6 Gt 2x4/4 R 3/3 R 4/4

Branch line locomotives	D VI D VII D VIII D X D XI BB II PtL 2/2 (Maffei) PtL 2/2 (Krauss) PtL 3/3 PtL 3/4 PtzL 3/4 GtL 4/4 (GtL 4/5 - DRG 98.10) (GtL 4/5 - DRG 98.11)

Narrow gauge locomotives	LE Pts 3/4 Gts 4/4 Gts 2x3/3

Electric locomotives	ES 1 EP 1 EP 2 EP 3 EP 4 EP 5 EG 1 EG 2 EG 3 (EG 4) (EG 5)

Railbuses	Krauss railmotor MCi MBCi MCCi MBCL MPL D4ieIT (D4ieIT variant - DRG ET 85)

Bavarian Ostbahn locomotives	A 1 – A 12 A 13 – A 24 A 1 – A 2 B 1 – B 66 B 67 – B 78 B 79 – B 90 B 91 – B 96 B 97 – B 109 C 1 – C 12 C 13 – C 64 D 1 – D 12 C 13 – C 14

Royal Bavarian State Railways

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Bavarian B XI

See also

Sources

External links