Bavarian A I

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

Bavarian I
Number(s)	K.Bay.Sts.E.: 1–24 (named)
Quantity	24
Manufacturer	Kessler (8) Maffei (8) Meyer (8)
Year(s) of manufacture	1844–1845
Retired	1874
Wheel arrangement	2-2-2
Axle arrangement	1A1 n2
Track gauge	1,435 mm (4 ft 8 ^1⁄2 in)
Length over buffers	9,739 mm (31 ft 11 ^7⁄16 in)
Service weight	15.0 or 20.5 t (14.8 or 20.2 long tons; 16.5 or 22.6 short tons)
Adhesive weight	7.5 t (7.4 long tons; 8.3 short tons)
Top speed	40 km/h (25 mph)
Driving wheel diameter	1,524 mm (5 ft 0 in)
Leading wheel diameter	915 mm (3 ft 0 in)
Trailing wheel diameter	915 mm (3 ft 0 in)
No. of cylinders	2
Cylinder bore	318 mm (12 ^1⁄2 in)
Piston stroke	559 mm (22 in)
Boiler Overpressure	6.3 kgf/cm^2 (618 kPa; 89.6 lbf/in^2)
Grate area	0.72–0.83 m^2 (7.8–8.9 sq ft)
Evaporative heating area	71.00 m^2 (764.2 sq ft)
Tender	2 T 3.35
Water capacity	3.35 m^3 (118 cu ft)

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 other examples were rebuilt into B 1 locomotives and four were sold. The last one was scrapped in 1874.

They were coupled with 2 T 3,35 tenders.

Der Münchner

Der Münchner
Number(s)	K.Bay.Sts.E.: 25
Quantity	1
Manufacturer	Maffei
Year(s) of manufacture	1841
Retired	1871
Wheel arrangement	2-2-2
Axle arrangement	1A1 n2
Track gauge	1,435 mm (4 ft 8 ^1⁄2 in)
Length over buffers	9,739 mm (31 ft 11 ^7⁄16 in)
Service weight	13.8 t (13.6 long tons; 15.2 short tons)
Adhesive weight	6.8 t (6.7 long tons; 7.5 short tons)
Top speed	59 km/h (37 mph)
Indicated Power	100 PS (74 kW; 99 hp)
Driving wheel diameter	1,524 mm (5 ft 0 in)
Leading wheel diameter	915 mm (3 ft 0 in)
Trailing wheel diameter	915 mm (3 ft 0 in)
No. of cylinders	2
Cylinder bore	305 mm (12 in)
Piston stroke	457 mm (18 in)
Boiler Overpressure	6 kgf/cm^2 (588 kPa; 85.3 lbf/in^2)
Grate area	0.93 m^2 (10.0 sq ft)
Evaporative heating area	46.00 m^2 (495.1 sq ft)
Tender	2 T 3
Water capacity	3.0 m^3 (660 imp gal; 790 US gal)

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 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.

See also

• List of Bavarian locomotives and railbuses