Bavarian State 4-4-2 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class S 2/5 / BR 14.1 (Locobase 3875)

Data from Maurice Demoulin, Locomotive Actuelle ... (Paris: Librairie Polytechnique Ch.Beranger, 1906), p 239-240, supplemented and slightly amended by [], last accessed 14 May 2011.

After trying out the Vauclain compounds, Bavaria bought 10 locomotives from Maffei that were of a more standard 4-cylinder compound layout in which each valve-cylinder combination had its own valve gear and drove on its own crosshead. LP cylinders were outside, HP inside. Anton Hammel, Maffei's chief designer, modeled his frame construction after the American engines' bar frame.

These racers pulled 250 tons on the level at 70 mph (110 kph) and headed up the Orient Express and the North-South Express. But, Joost Wilbrink ([]) notes, Bavarian route profiles had very little flat running in them and these engines went to the Pfalz in 1911. Five were left for the DRG to take up in the 1920s.


Class S 2/5 // BR 14.1 (Locobase 3874)

Data from Christian Lindecke [], first accessed 20 December 2003. Additional data from Maurice Demoulin, Locomotive Actuelle ... (Paris: Librairie Polytechnique Ch.Beranger, 1906), p 240, which gives a larger figure for the heating surface that Locobase adopts; and DeGolyer, Volume 23, p. 159. Works numbers were 18380-18381 in November 1900.

These were two Vauclain compounds with 13" (330 mm) piston valves imported by the Bavarian railway as their first compounds.

Although they were given DRG numbers in 1923, the pair was retired in the same year.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassS 2/5 / BR 14.1S 2/5 // BR 14.1
Locobase ID3875 3874
RailroadBavarian StateBavarian State
CountryGermanyGermany
Whyte4-4-24-4-2
Number in Class102
Road Numbers3001-3010 / BR 14 141-BR 145BR 14 131-14 132
GaugeStdStd
Number Built102
BuilderMaffeiBurnham, Williams & Co
Year19041900
Valve GearHeusingerStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.38 / 2.25 6.75 / 2.06
Engine Wheelbase (ft / m)28.38 / 8.6525.42 / 7.75
Ratio of driving wheelbase to overall engine wheelbase 0.26 0.27
Overall Wheelbase (engine & tender) (ft / m)54.83 / 16.71
Axle Loading (Maximum Weight per Axle) (lbs / kg)35,274 / 16,00035,274 / 16,000
Weight on Drivers (lbs / kg)70,548 / 32,00070,548 / 32,000
Engine Weight (lbs / kg)151,237 / 68,600132,718 / 60,200
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)5808 / 225549 / 21.02
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)59 / 29.5059 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)78.70 / 200072 / 1829
Boiler Pressure (psi / kPa)232.10 / 16203.10 / 14
High Pressure Cylinders (dia x stroke) (in / mm)13.39" x 25.2" / 340x64013" x 26" / 330x660
Low Pressure Cylinders (dia x stroke) (in / mm)22.44" x 25.2" / 570x64022" x 26" / 560x660
Tractive Effort (lbs / kg)16,705 / 7577.2715,618 / 7084.21
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.22 4.52
Heating Ability
Tubes (number - dia) (in / mm)278 - 1.89" / 48264 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)14.93 / 4.5515 / 4.57
Firebox Area (sq ft / m2)156.02 / 14.50148.27 / 13.78
Grate Area (sq ft / m2)35.29 / 3.2830.45 / 2.83
Evaporative Heating Surface (sq ft / m2)2211 / 205.502210 / 205.39
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2211 / 205.502210 / 205.39
Evaporative Heating Surface/Cylinder Volume538.33553.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation81916184
Same as above plus superheater percentage81916184
Same as above but substitute firebox area for grate area36,21230,114
Power L178946288
Power MT493.37393.00

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