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
Type and origin
Builder
Build date1844–1845
Total produced24
Specifications
Configuration:
​
 • Whyte2-2-2
Gauge1,435 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 beams9,739 mm (31 ft 11+7⁄16 in)
Adhesive weight7.5 t (7.4 long tons; 8.3 short tons)
Service weight15.0 or 20.5 t (14.8 or 20.2 long tons; 16.5 or 22.6 short tons)
Water cap.3.35 m3 (118 cu ft)
Boiler pressure6.3 kgf/cm2 (618 kPa; 89.6 lbf/in2)
Heating surface:
 • Firebox		0.72–0.83 m2 (7.8–8.9 sq ft)
 • Evaporative71.00 m2 (764.2 sq ft)
Cylinders2
Cylinder size318 mm (12+1⁄2 in)
Piston stroke559 mm (22 in)
Performance figures
Maximum speed40 km/h (25 mph)
Career
NumbersK.Bay.Sts.E.: 1–24 (named)
Retired1874

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
Type and origin
BuilderMaffei
Build date1841
Total produced1
Specifications
Configuration:
​
 • Whyte2-2-2
Gauge1,435 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 beams9,739 mm (31 ft 11+7⁄16 in)
Adhesive weight6.8 t (6.7 long tons; 7.5 short tons)
Service weight13.8 t (13.6 long tons; 15.2 short tons)
Water cap.3.0 m3 (660 imp gal; 790 US gal)
Boiler pressure6 kgf/cm2 (588 kPa; 85.3 lbf/in2)
Heating surface:
 • Firebox		0.93 m2 (10.0 sq ft)
 • Evaporative46.00 m2 (495.1 sq ft)
Cylinders2
Cylinder size305 mm (12 in)
Piston stroke457 mm (18 in)
Performance figures
Maximum speed59 km/h (37 mph)
Indicated power100 PS (74 kW; 99 hp)
Career
NumbersK.Bay.Sts.E.: 25
Retired1871

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
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