Ouest 2-6-2 Locomotives in France
Class Details by Steve Llanso of Sweat House Media
Class 3801 (Locobase 6063)
Data from I N Jevica's [
] (visited 29 May 2004) and Railway Engineer, October 1908, p 315.
A sturdy-looking tank with widely spaced axles, Belpaire firebox, dome over the first axle, small sand dome, cab with rounded roof, and trailing axle under the footplate. (Thus, not really a "Prairie" tank, since the Prairie's trailing axle usually supported the firebox.)
Already representing something of a departure in its combination of wheel arrangement and compounding, this class further differed in the cylinder layout. The HP cylinders rode inside the frame, the LP outside and all four rested side-by-side. Each cylinder had its own valve gear, the HP gear actuating piston valves, the LP operating slide valves. Like many French locomotives, these were fitted with large-diameter Serve tubes.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 3801 |
| Locobase ID | 6063 |
| Railroad | Ouest |
| Country | France |
| Whyte | 2-6-2T |
| Number in Class | 50 |
| Road Numbers | 3801-3850 |
| Gauge | Std |
| Number Built | 50 |
| Builder | several |
| Year | 1908 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14.27 / 4.35 |
| Engine Wheelbase (ft / m) | 29.36 / 8.95 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | 29.33 / 8.94 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 112,877 / 51,200 |
| Engine Weight (lbs / kg) | 163,142 / 74,000 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1848 / 7 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.80 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 63 / 31.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60.60 / 1539 |
| Boiler Pressure (psi / kPa) | 217.60 / 1500 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13.39" x 23.62" / 340x600 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 20.87" x 23.62" / 530x600 |
| Tractive Effort (lbs / kg) | 18,313 / 8306.65 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.16 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 117 - 2.756" / 70 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.80 / 3.90 |
| Firebox Area (sq ft / m2) | 135.20 / 12.56 |
| Grate Area (sq ft / m2) | 27.13 / 2.52 |
| Evaporative Heating Surface (sq ft / m2) | 1928 / 179.10 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1928 / 179.10 |
| Evaporative Heating Surface/Cylinder Volume | 500.83 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5903 |
| Same as above plus superheater percentage | 5903 |
| Same as above but substitute firebox area for grate area | 29,420 |
| Power L1 | 6120 |
| Power MT | 358.59 |