Bavarian A I

Bavarian I
Model of Bavaria, the first Maffei-built member of the class
Type and origin Power type Steam Builder Emil Keßler (8) Maffei (8) Meyer (8) Serial number Keßler: 15–20, 26–27 Maffei: 2–7, 9, 8 Meyer: 11–14, 17–20 Build date 1844–1845 Total produced 24
Specifications Configuration: ​  • Whyte 2-2-2  • UIC 1A1 n2 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 914.5 mm (3 ft 0 in) Driver dia. 1,524 mm (5 ft 0 in) Trailing dia. 914.5 mm (3 ft 0 in) Wheelbase: ​  • Axle spacing (Asymmetrical) 2,006 mm (6 ft 7 in) + 1,384 mm (4 ft 6+1⁄2 in)  • Engine 3,390 mm (11 ft 1+1⁄2 in)  • Tender 1,780 mm (5 ft 10+1⁄8 in)  • incl. tender 6,825 mm (22 ft 4+3⁄4 in) Length: ​  • Over buffers 9,798 mm (32 ft 1+3⁄4 in) Adhesive weight 6.83 t (6.72 long tons; 7.53 short tons) Service weight 17.14 t (16.87 long tons; 18.89 short tons) Tender type 2 T 3,35 Fuel capacity 600 kg (1,300 lb) Water cap. 3.35 m3 (740 imp gal; 880 US gal) Firebox: ​  • Grate area 0.76 m2 (8.2 sq ft) Boiler: ​  • Tube plates 2,895 mm (9 ft 6 in)  • Small tubes 46 mm (1+13⁄16 in), 111 off Boiler pressure 6.0 bar (6.12 kgf/cm2; 87.0 lbf/in2) Heating surface: ​  • Firebox 4.83 m2 (52.0 sq ft)  • Tubes 41.62 m2 (448.0 sq ft)  • Total surface 46.45 m2 (500.0 sq ft) Cylinders Two, outside Cylinder size 305 mm × 508 mm (12 in × 20 in)
Performance figures Maximum speed 40 km/h (25 mph) Indicated power 130 PS (96 kW; 130 hp)
Career Operators Royal Bavarian State Railways Numbers K.Bay.Sts.E.: 1–24 (named) Retired 1874

Bavarian A I engines were German steam locomotives in service with the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn) from 1841 to 1871.

Three manufacturers were awarded a contract to build eight locomotives each, with the stipulation that the components of the different machines had to be interchangeable with one another. The engines achieved a speed of 33 km/h on a line with an incline of 1:200. The first engine was retired in 1871 and scrapped. Five examples were rebuilt into B I class 2-4-0 locomotives, four were rebuilt into C I class 0-6-0 locomotives, and four were sold. The last one was scrapped in 1874.

They were coupled with 2 T 3,35 tenders.

Der Münchner
Type and origin Power type Steam Builder Maffei Serial number 1 Build date 1841 Total produced 1
Specifications Configuration: ​  • Whyte 2-2-2 Gauge 1,435 mm (4 ft 8+1⁄2 in) Leading dia. 915 mm (3 ft 0 in) Driver dia. 1,524 mm (5 ft 0 in) Trailing dia. 915 mm (3 ft 0 in) Length: ​  • Over buffers 9,739 mm (31 ft 11+7⁄16 in) Adhesive weight 6.8 t (6.7 long tons; 7.5 short tons) Service weight 13.8 t (13.6 long tons; 15.2 short tons) Water cap. 3.0 m3 (660 imp gal; 790 US gal) Firebox: ​  • Grate area 0.93 m2 (10.0 sq ft) Boiler pressure 6 kgf/cm2 (588 kPa; 85.3 lbf/in2) Heating surface 46.00 m2 (495.1 sq ft) Cylinders Two Cylinder size 305 mm × 457 mm (12 in × 18 in)
Performance figures Maximum speed 59 km/h (37 mph) Indicated power 100 PS (74 kW; 99 hp)
Career Operators Munich–Augsburg Railway Company Royal Bavarian State Railways Numbers K.Bay.Sts.E.: 25 Retired 1871

Der Münchner (a Münchner is a man from Munich) was a Bavarian Class A I engine with the number 25. It was originally built for the Munich–Augsburg Railway Company, a private railway company which ran the route between Munich and Augsburg. In 1844 the line was taken over by the state railway and the engine was transferred into state ownership. A large part of the locomotive came from England, which can be seen from the typically English 'pear' shape of the outer firebox.

It was coupled with a 2 T 3 tender.

• List of Bavarian locomotives and railbuses

• Schnabel, Heinz (1987). Eisenbahn-Fahrzeug-Archiv Band 2.5: Lokomotiven bayerischer Eisenbahnen (in German). Düsseldorf: Alba Publikation Alf Teloeken GmbH + Co KG. pp. 56–59, 368. ISBN 3-87094-105-7.