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
Type and origin Builder Krauss Build date 1894–1896 Total produced 12
Specifications Configuration: ​  • Whyte 2-8-0 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 1006 mm Driver dia. 1170 mm Wheelbase: ​  • incl. tender 12750 mm Length: ​  • Over buffers 16800 mm Axle load 13.5 t (centre) Adhesive weight 54,0 t Service weight 64.4 t Tender weight 32.8 t Tender type bay 3 T 12.3 Fuel capacity 5.5 t coal Water cap. 12.3 m3 Firebox: ​  • Grate area 2.43 m2 Boiler pressure 12 kg/cm2 = 11.77 bar Heating surface 159.8 m2 Cylinders 2 Cylinder size 540 mm Piston stroke 560 mm Valve gear Walschaerts (Heusinger), outside
Performance figures Maximum speed 50 km/h
Career Numbers Bavaria: 2051–2062 France: Etat 140-901 to 903 Retired 1924

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
Type and origin Builder Krauss Build date 1896–1897 Total produced 2
Specifications Configuration: ​  • Whyte 2-8-0  • UIC 1'D n4v Gauge 1,435 mm (4 ft 8+1⁄2 in) Tender weight 32.8 t Tender type bay 3 T 12.3 Fuel capacity 5.5 t coal Water cap. 12.3 m3 Boiler pressure 13.5 kg/cm2 = 13.24 bar Cylinders 4 Cylinder size 2x370/710 mm Piston stroke 560 mm
Career Numbers Bavaria: 2063–2064 Retired 1924
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
Type and origin Builder Krauss Build date 1899–1901 Total produced 48
Specifications Configuration: ​  • Whyte 2-8-0  • UIC 1'D n2 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 1006 mm Driver dia. 1170 mm Wheelbase: ​  • incl. tender 15425 mm1 Length: ​  • Over buffers 18202 mm1 Axle load 13.6 t (centre) Adhesive weight 54.5 t Service weight 64.5 t Tender weight 34.9 / 36.3 / 43.0 t Tender type bay 3 T 13.8 bay 3 T 14 bay 2'2' T 18 Fuel capacity 5.5 / 6.0 / 6.5 t coal Water cap. 13.8 / 14.0 / 18.0 m3 Firebox: ​  • Grate area 2.43 m2 Boiler pressure 12 kg/cm2 = 11.77 bar Heating surface 159.8 m2 Cylinders 2 Cylinder size 540 mm Piston stroke 560 mm Valve gear Walschaerts (Heusinger), outside
Performance figures Maximum speed 60 km/h
Career Numbers Bavaria: 2065–2099, 2116–2130 France: Etat 140-904 to 905, 907 Belgium: Etat Belge 7374–7375 Poland: PKP Tr101-1 Retired 1923–1925
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)
Type and origin Builder Baldwin Build date 1899 Total produced 2
Specifications Configuration: ​  • Whyte 2-8-0  • UIC 1'D n4v Leading dia. 914 mm Driver dia. 1,270 mm Length: ​  • Over buffers 18,501 mm Axle load 13.6 t (centre) Adhesive weight 54.4 t Service weight 62.6 t Tender weight 44.0 t Tender type bay 2'2' T 18.1 Fuel capacity 6.5 t coal Water cap. 18.1 m3 Firebox: ​  • Grate area 3.08 m2 Boiler pressure 14 kg/cm2 = 13,73 bar Heating surface 177.50 m2 Cylinder size 2 x 356/610 mm Piston stroke 660 mm Valve gear Stephenson, inside
Performance figures Maximum speed 50 km/h
Career Numbers Bavaria: 2085–2086 France: Etat 140-906 Retired 1917-1919

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

• Royal Bavarian State Railways
• List of Bavarian locomotives and railbuses

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.