Bavarian E I

The Bavarian Class E I steam locomotives operated by the Royal Bavarian State Railways encompassed four different variants of saturated steam, goods train locomotive with a 2-8-0 wheel arrangement.

Standard variant, older type
Bavarian E I
Standard variant, older type
Number(s)
  • K.Bay.Sts.E.: 2051–2062
  • État 140-901 to 140-903
Quantity12
ManufacturerKrauss
Year(s) of manufacture1894–1896
Retired1924
Wheel arrangement2-8-0
Axle arrangement1′D n2
Track gauge1,435 mm (4 ft 8 1⁄2 in)
Length over buffers16,800 mm (55 ft 1 1⁄2 in)
Wheelbase incl. tender12,750 mm (41 ft 10 in)
Service weight64.4 t (63.4 long tons; 71.0 short tons)
Adhesive weight54.0 t (53.1 long tons; 59.5 short tons)
Axle load13.5 t (13.3 long tons; 14.9 short tons) (centre)
Top speed50 km/h (31 mph)
Driving wheel diameter1,170 mm (3 ft 10 1⁄8 in)
Leading wheel diameter1,006 mm (3 ft 3 5⁄8 in)
Valve gearWalschaerts (Heusinger), outside
No. of cylinders2
Cylinder bore540 mm (21 1⁄4 in)
Piston stroke560 mm (22 1⁄16 in)
Boiler Overpressure12 kgf/cm2 (1,180 kPa; 171 lbf/in2)
Grate area2.43 m2 (26.2 sq ft)
Evaporative heating area159.8 m2 (1,720 sq ft)
Tenderbay 3 T 12.3
Tender service weight32.8 t (32.3 long tons; 36.2 short tons)
Water capacity12.3 m3 (2,700 imp gal; 3,200 US gal)
Fuel5,500 kg (12,100 lb) coal

The first series of E I's was built by Krauss in 12 examples. The cylinders were positioned in front of the carrying axle and drove the first coupled axle. The carrying and driving axles were linked together in a Krauss-Helmholtz bogie. In addition the outside Walschaerts (Heusinger) valve gear had very short connecting rods on the engines delivered to Bavaria.

The vehicles were coupled with Bavarian Class bay 2'2' T 18 tenders. Later they were equipped with Class 3 T 12.3 tenders from the Bavarian B XI's.

Sondermann Variant
Bavarian E I
Sondermann variant
Number(s)K.Bay.Sts.E.: 2063–2064
Quantity2
ManufacturerKrauss
Year(s) of manufacture1896–1897
Retired1924
Wheel arrangement2-8-0
Axle arrangement1′D n4v
Track gauge1,435 mm (4 ft 8 1⁄2 in)
No. of cylinders4 (compound)
LP cylinder bore710 mm (27 15⁄16 in)
HP cylinder bore370 mm (14 9⁄16 in)
Piston stroke560 mm (22 1⁄16 in)
Boiler Overpressure13.5 kgf/cm2 (1.32 MPa; 192 lbf/in2)
Tenderbay 3 T 12.3
Tender service weight32.8 t (32.3 long tons; 36.2 short tons)
Water capacity12.3 m3 (2,700 imp gal; 3,200 US gal)
Fuel5,500 kg (12,100 lb) coal
certain technical data as for the newer standard variant; slightly differing weights

The second E I series delivered to the Royal Bavarian State Railways was the Sondermann Variant built from 1896. It had two overlapping cylinders that formed a combined double slide valve (Doppelschieber). The carrying axle and the first driving axle were housed in a Krauss-Helmholtz bogie. The advantage of this locomotive variant was that the double cylinder was very short as a result of the tandem construction. Nevertheless, the engine did not perform especially well, so that the two units were converted into locomotives with a conventional cylinder arrangement.

Standard variant, newer type
Bavarian E I
Standard variant, newer type
Number(s)
  • K.Bay.Sts.E.: 2065–2099, 2116–2130
  • État: 140-904 to 140-905, 140-907
  • État-Belge: 7374–7375
  • PKP: Tr101-1
Quantity48
ManufacturerKrauss
Year(s) of manufacture1899–1901
Retired1923–1925
Wheel arrangement2-8-0
Axle arrangement1′D n2
Track gauge1,435 mm (4 ft 8 1⁄2 in)
Length over buffers18,202 mm (59 ft 8 1⁄2 in)1
Wheelbase incl. tender15,425 mm (50 ft 7 1⁄4 in)1
Service weight64.5 t (63.5 long tons; 71.1 short tons)
Adhesive weight54.5 t (53.6 long tons; 60.1 short tons)
Axle load13.6 t (13.4 long tons; 15.0 short tons) (centre)
Top speed60 km/h (37 mph)
Driving wheel diameter1,170 mm (3 ft 10 1⁄8 in)
Leading wheel diameter1,006 mm (3 ft 3 5⁄8 in)
Valve gearWalschaerts (Heusinger), outside
No. of cylinders2
Cylinder bore540 mm (21 1⁄4 in)
Piston stroke560 mm (22 1⁄16 in)
Boiler Overpressure12 kgf/cm2 (1,180 kPa; 171 lbf/in2)
Grate area2.43 m2 (26.2 sq ft)
Evaporative heating area159.8 m2 (1,720 sq ft)
Tender
  • bay 3 T 13.8 or
  • bay 3 T 14 or
  • bay 2'2' T 18
Tender service weight34.9 / 36.3 / 43.0 t
Water capacity13.8 / 14.0 / 18.0 m3
Fuel5.5 / 6.0 / 6.5 t coal
1 with bay 2'2' T 18 tender

The third series of the E I locomotive was the final version of this particular class. A total of 48 vehicles were made and 42 were taken over by the Reichsbahn with the numbers 56 312 - 56 353. It was the same as the Sondermann variant after the conversion of the latter. These locomotives could haul a train of 820 tons at a speed of 50 km/h and even attained a speed of 40 km/h with a 1,390 ton train. On a line with a 0.5% incline they could manage an 845-ton train at 25 km/h.

Vauclain Variant
Bavarian E I (Vauclain)
Number(s)
  • K.Bay.Sts.E.: 2085–2086
  • État: 140-906
Quantity2
ManufacturerBaldwin
Year(s) of manufacture1899
Retired1917-1919
Wheel arrangement2-8-0
Axle arrangement1′D n4v
Length over buffers18,501 mm (60 ft 8 1⁄2 in)
Service weight62.6 t (61.6 long tons; 69.0 short tons)
Adhesive weight54.4 t (53.5 long tons; 60.0 short tons)
Axle load13.6 t (13.4 long tons; 15.0 short tons) (centre)
Top speed50 km/h (31 mph)
Driving wheel diameter1,270 mm (4 ft 2 in)
Leading wheel diameter914 mm (3 ft 0 in)
Valve gearStephenson, inside
No. of cylinders4 (compound)
LP cylinder bore610 mm (24 in)
HP cylinder bore356 mm (14 in)
Piston stroke660 mm (26 in)
Boiler Overpressure14 kgf/cm2 (1.37 MPa; 199 lbf/in2)
Grate area3.08 m2 (33.2 sq ft)
Evaporative heating area177.50 m2 (1,910.6 sq ft)
Tenderbay 2'2' T 18.1
Tender service weight44.0 t (43.3 long tons; 48.5 short tons)
Water capacity18.1 m3 (4,000 imp gal; 4,800 US gal)
Fuel6,500 kg (14,300 lb) coal

The Class E I locomotives built for the Royal Bavarian State Railways by the Baldwin were goods train steam locomotives imported from the United States for testing purposes.

The two machines were the first in Germany to have a bar frame, which had been standard in the USA virtually from the beginning and which had been developed from the wooden beam frames of the early locomotives.

Like the two S 2/5 express train locomotives also imported from Baldwin a year later these engines were equipped with a four-cylinder Vauclain compound engine, on which the high-pressure and low-pressure cylinders were located directly one above the other and worked on the same connecting rods. Apart from the bar frame, this type of drive did not catch on in Bavaria.

The locomotives were equipped with Bavarian 2'2' T 18,1 tenders.

See also

Sources
  • Merkbuch für die Fahrzeuge der Reichsbahn. I. Dampflokomotiven und Tender (Regelspur). Ausgabe 1924. Berlin: Eisenbahn-Zentralamt Berlin. 1924.
  • Scheingraber, Günther (1975). Die Königlich Bayerischen Staatseisenbahnen. Stuttgart: Franckh. ISBN 3-440-04233-2.
  • v. Welser, Ludwig (1996). Bayern-Report Band No. 6. Fürstenfeldbruck: Merker. ISBN 3-922404-94-4.
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