Gotthardbahn 0-6-0 Locomotives in Switzerland


Class Details by Steve Llanso of Sweat House Media

Class D 3/3 Esslingen (Locobase 5123)

Data from [link], last accessed 19 January 2017, (First viewed August 2002) .Works numbers were 1845-1850 in 1881, 1851-1860 in 1882.

These were the second of the 0-6-0s for Gotthard; see Locobase 5122 for the earlier Bourbonnais engines . The 1881-1882 locomotives carried larger fireboxes and weighed more.

Esslingen delivered the first batch of six in 1881 and followed with the other ten after the turn of the year. Cost per locomotive was 59,000 Swiss francs.

According to that same site, these engines managed a max speed in the mountains of 25 kph (15.5 mph) and 55 kph (34 mph) on the level.

Tonnage ratings were as follows:

Mountain -- freight 165 tons

Mountain -- passenger 195 tons

Level -- freight 600 tons

Level -- passenger 350 tons


Class D 3/3 Krauss (Locobase 5122)

Data from [link], last accessed 19 January 2017, (August 2002). Works numbers were Krauss 414-417 in 1874 and Karlsruhe 917-918 in 1876,

The website shows these as the first in a series of six-coupled goods engines. And they're further identified as the Bourbonnais type (i.e., short-wheelbase, simply designed and very reliable).

SLM replaced the boilers in three of the engines (41, 42, and 45) in 1891-1893. According to gotthardbahn.ch, these new 170-psi boilers were slightly larger with a grate area of 16.14 sq ft and heating surface enlarged to 1,515 sq ft.

43 was retired in 1906, 44 in 1909. The others retired in 1911-1912.


Class D 3/3 SLM I (Locobase 5124)

Data from [link], last accessed 19 January 2017, (First viewed August 2002). Works numbers were 633-634 in 1890 and 819-825 in 1893.

A further tweak on the Esslingen 0-6-0 design (see Locobase 5123 for the 1881-1882 forebears) for Gotthard by the home-country builder. Boiler pressure rose 20% and the driver diameter increased slightly, netting an increase in tractive effort.

Cost per locomotive was 66,800 Swiss francs.


Class D 3/3 SLM II (Locobase 5125)

Data from [link], last accessed 19 January 2017, (First viewed August 2002). Works numbers were 930-934 in 1895.

These were the last of the 0-6-0s for the Gotthard. Principal difference was a larger firebox and grate.

Delivered in 1895 at the cost of 66,400 Swiss francs each. In 1906, 83 was superheated. The firetube area shrank to 1,173 sq ft to make room for the 251 sq ft (23.32 sq m) of Pielock superheater surface (see Locobase 13565 for a detailed description of this unit).

Tube diameter is estimated, calculated from (total heating surface minus firebox heating surface) divided by (tube number times length).


Class E 3/3 Marsaglia (Locobase 5116)

Data from [link], last accessed 19 January 2017, (First viewed August 2002). Works number was 68 in 1875.

The first 0-6-0T to run on the Gotthard, its early date suggests involvement in the railroad's construction. Also, with a works number of 68, it clearly was an early SLM product. According to the same site's roster notes, the engine actually began serving the GB in 1880, acquiring the name Marsaglia in 1882 and running until 1913.


Class Ec 3/3 SLM I (Locobase 5129)

Data from [link], last accessed 19 January 2017, (First viewed August 2002). Works numbers were 1073-1078 in 1897.

Six-coupled tanks delivered as a batch in 1897. Cost per locomotive was 49,000 Swiss francs.


Class Ec 3/3 SLM II (Locobase 5130)

Data from [link], last accessed 19 January 2017, (First viewed August 2002). Works numbers were 1375-1380 in 1901.

Follow-on batch of freight tank engines with slightly less heating surface area than 301-306, but more tubes. Cost per locomotive was 56,750 Swiss francs, a 15.8% increase over 4 years.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassD 3/3 EsslingenD 3/3 KraussD 3/3 SLM ID 3/3 SLM IIE 3/3 Marsaglia
Locobase ID5123 5122 5124 5125 5116
RailroadGotthardbahnGotthardbahnGotthardbahnGotthardbahnGotthardbahn
CountrySwitzerlandSwitzerlandSwitzerlandSwitzerlandSwitzerland
Whyte0-6-00-6-00-6-00-6-00-6-0T
Number in Class1661251
Road Numbers51-6641-4667-7879-8313
GaugeStdStdStdStdStd
Number Built1661251
BuilderEsslingenseveralSLMSLMSLM
Year18811874189018951875
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.04 / 3.6710.50 / 3.2012.37 / 3.7712.80 / 3.90 8.53 / 2.60
Engine Wheelbase (ft / m)12.04 / 3.6710.50 / 3.2012.37 / 3.7712.80 / 3.90 8.53 / 2.60
Ratio of driving wheelbase to overall engine wheelbase11111
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)96,783 / 43,90083,335 / 37,800103,176 / 46,800105,160 / 47,70051,116 / 23,186
Engine Weight (lbs / kg)96,783 / 43,90083,335 / 37,800103,176 / 46,800105,160 / 47,70051,116 / 23,186
Tender Loaded Weight (lbs / kg)53,572 / 24,30041,888 / 19,00056,879 / 25,80058,422 / 26,500
Total Engine and Tender Weight (lbs / kg)150,355 / 68,200125,223 / 56,800160,055 / 72,600163,582 / 74,200
Tender Water Capacity (gals / ML)2244 / 8.501848 / 72244 / 8.502244 / 8.50792 / 3
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)5 / 5 3.30 / 35 / 55 / 5 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 2746 / 2357 / 28.5058 / 2928 / 14
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)52.40 / 133052.40 / 133053.10 / 135053.10 / 135040.60 / 1031
Boiler Pressure (psi / kPa)145 / 1000145 / 1000174 / 1200174 / 1200145 / 1000
High Pressure Cylinders (dia x stroke) (in / mm)18.9" x 25.2" / 480x64018.9" x 25.2" / 480x64018.9" x 25.2" / 480x64018.9" x 25.2" / 480x64013.39" x 19.69" / 340x500
Tractive Effort (lbs / kg)21,173 / 9603.9221,173 / 9603.9225,073 / 11372.9425,073 / 11372.9410,717 / 4861.16
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.57 3.94 4.12 4.19 4.77
Heating Ability
Tubes (number - dia) (in / mm)207 - 1.97" / 50189 - 2" / 51205 - 1.97" / 50215 - 1.97" / 50123 - 1.77" / 45
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.80 / 3.9014.11 / 4.3012.80 / 3.9011.81 / 3.60 8.53 / 2.60
Firebox Area (sq ft / m2)93.61 / 8.7082.85 / 7.7093.61 / 8.70109.75 / 10.2047.34 / 4.40
Grate Area (sq ft / m2)19.37 / 1.8015.06 / 1.4019.37 / 1.8022.60 / 2.10 8.61 / 0.80
Evaporative Heating Surface (sq ft / m2)1459 / 135.591482 / 137.731444 / 134.201424 / 132.34538 / 50
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1459 / 135.591482 / 137.731444 / 134.201424 / 132.34538 / 50
Evaporative Heating Surface/Cylinder Volume178.30181.11176.47174.02167.65
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation28092184337039321248
Same as above plus superheater percentage28092184337039321248
Same as above but substitute firebox area for grate area13,57312,01316,28819,0976864
Power L129822935359837122369
Power MT203.78232.94230.64233.46306.52

Principal Dimensions by Steve Llanso of Middle Run Media
ClassEc 3/3 SLM IEc 3/3 SLM II
Locobase ID5129 5130
RailroadGotthardbahnGotthardbahn
CountrySwitzerlandSwitzerland
Whyte0-6-0T0-6-0T
Number in Class66
Road Numbers301-306307-312
GaugeStdStd
Number Built66
BuilderSLMSLM
Year18971901
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.15 / 3.4011.15 / 3.40
Engine Wheelbase (ft / m)11.15 / 3.4011.15 / 3.40
Ratio of driving wheelbase to overall engine wheelbase11
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)94,137 / 42,70094,137 / 42,700
Engine Weight (lbs / kg)94,137 / 42,70094,137 / 42,700
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1188 / 4.501188 / 4.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)2 / 22 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 2652 / 26
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48.40 / 122948.40 / 1230
Boiler Pressure (psi / kPa)174 / 1200174 / 1200
High Pressure Cylinders (dia x stroke) (in / mm)14.96" x 23.62" / 380x60014.96" x 23.62" / 380x600
Tractive Effort (lbs / kg)16,153 / 7326.8916,153 / 7326.89
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.83 5.83
Heating Ability
Tubes (number - dia) (in / mm)157 - 1.97" / 50170 - 1.772" / 45
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.84 / 3 9.84 / 3
Firebox Area (sq ft / m2)73.17 / 6.8073.20 / 6.80
Grate Area (sq ft / m2)13.99 / 1.3013.99 / 1.30
Evaporative Heating Surface (sq ft / m2)869 / 80.76849 / 78.90
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)869 / 80.76849 / 78.90
Evaporative Heating Surface/Cylinder Volume180.84176.68
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation24342434
Same as above plus superheater percentage24342434
Same as above but substitute firebox area for grate area12,73212,737
Power L136073549
Power MT253.42249.34

All material Copyright © SteamLocomotive.com
Wes Barris