Saint Etienne / St Etienne 0-4-0 Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class Type 2 (Locobase 20424)

Data from Schneider Catalogue, last accessed 27 August 2018 at [], pp. 5-6. Works numbers were 7-8 in 1838.

Class none (Locobase 593)

Ninth engine built by Stephenson and the first sold abroad. Marc Seguin's St. Etienne-Lyons Railroad was built from the start for steam. The engine described is the second of 2 supplied by Stephenson and the only one for which there is an illustration extant. The vertical cylinders were positioned between the drivers and connected to both drivers through a parallelogram linkage on the walking-beam ends. These were not very successful engines, having only limited steaming power (600 lb per hour). One survived until 1859.

Class none (Locobase 594)

Data from Reder (1974). See also article hosted on (August 2002).

This is the first engine designed with a multi-tube boiler. The boiler was 10 ft long.

Marc Seguin devised this boiler to increase steam production over the Stephenson locomotives that had proved so disappointing. Seguin began work on a multi-tube boiler earlier than did Stephenson and applied for a patent for a multi-tubular boiler design in mid-1827. His engine did not begin trials until a month after Stephenson's Rocket had successfully performed at the Rainhill trials.

The layout was not what would later be conventional. The firebox and "combustion chamber" were under the firetube and steam-collecting barrel. Gases led forward to through the chamber, then back through the tubes, exhausting through a stack at the rear of the locomotive. Drafting the fire was accomplished with 2 large rotary bellows carried in the tender, driven by a fan belt off the tender's rear axle, and connected to the firebox through flexible hoses to 2 smaller holes under the firebox door.

They were more successful once the bellows were replaced by a chimney blast pipe. A total of 12 engines of this type were built from 1829 to 1835 at Lyons-Perrache. They acquired the nickname "Scieurs de Long" (Alternating Saws) because of the series of levers in their motion

In 1980, Gaston Monnier, professor of mechanical engineering, founded lñAssociation pour la Reconstruction et la PrTservation du Patrimoine Industriel (ARPPI) and began work on a replica of the Seguin in 1981. After six years of work, the "Marc Seguin 1829" turned its wheels under steam for the first time.

NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassType 2nonenone
Locobase ID20424 593 594
RailroadSaint EtienneSt EtienneSt Etienne
Number in Class2112
Road Numbers1
Number Built2112
BuilderSchneider-CreusotRobert Stephenson & CoSeguin
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.25 / 1.60
Engine Wheelbase (ft / m) 5.25 / 1.60
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)20,944 / 950020,973 / 951313,228 / 6000
Engine Weight (lbs / kg)20,944 / 950020,973 / 951313,228 / 6000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)17 / 8.5017 / 8.5011 / 5.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54.30 / 138048 / 121947.70 / 1212
Boiler Pressure (psi / kPa)84.10 / 5.8051.40 / 3.5058 / 4
High Pressure Cylinders (dia x stroke) (in / mm)11.81" x 15.75" / 300x4008.7" x 26" / 221x6609.02" x 22.99" / 229x584
Tractive Effort (lbs / kg)2892 / 1311.791791 / 812.381933 / 876.80
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.2411.71 6.84
Heating Ability
Tubes (number - dia) (in / mm)96 - 1.732" / 4445 - 1.575" / 40
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.22 / 2.20 9.84 / 3
Firebox Area (sq ft / m2)50.59 / 4.7074.06 / 6.88
Grate Area (sq ft / m2) 6.46 / 0.607 / 0.65
Evaporative Heating Surface (sq ft / m2)239 / 22.21
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)239 / 22.21
Evaporative Heating Surface/Cylinder Volume140.56
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation543406
Same as above plus superheater percentage543406
Same as above but substitute firebox area for grate area42554295
Power L11652
Power MT550.66

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