Bone-Guelma Articulated Locomotives in Tunisia
Class Details by Steve Llanso of Sweat House Media
Class 602 (Locobase 21031)
Data from online Flicker Historical Railway Images album at [
], laat accessed 5 July 2022. Works numbers were 4135-4148 in 1908.
Class 681 (Locobase 14725)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 63, p. 84+ . Works numbers were 53322-53323, 53334, 53352-53353,53365-53366 in June 1920; 53389, 53419-53420 in July.
Locobase 12378 describes the B-G briefly. This Baldwin order for ten Mallet tanks added to an already impressive stud of such twelve-axle haulers. The specs rated the line as having maximum 2% grades and minimum curve radii of 492 feet (150 metres) or 11 2/3 degrees. Fuel was, unusually, soft coal and oil, the oil to be used as an auxiliary fuel "when the locomotive is working on grades." The oil burner was fitted to the back head under the fire door.
Principal Dimensions by Steve Llanso of Sweat House Media | ||
|---|---|---|
| Class | 602 | 681 |
| Locobase ID | 21031 | 14725 |
| Railroad | Bone-Guelma (et Prolongemonts) | Bone-Guelma (et Prolongemonts) |
| Country | Tunisia | Tunisia |
| Whyte | 0-6-6-0T | 0-6-6-0T |
| Number in Class | 14 | 10 |
| Road Numbers | 602-615 | 681-690 |
| Gauge | Metre | Metre |
| Number Built | 14 | 10 |
| Builder | Berliner Maschinenbau | Baldwin |
| Year | 1908 | 1920 |
| Valve Gear | Heusinger | Walschaert |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 8.01 / 2.44 | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 22.67 / 6.91 | |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 | |
| Overall Wheelbase (engine & tender) (ft / m) | 22.67 / 6.91 | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 134,350 / 60,940 | 132,500 / 60,101 |
| Engine Weight (lbs / kg) | 134,350 / 60,940 | 132,500 / 60,101 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | 134,350 / 60,940 | 132,500 / 60,101 |
| Tender Water Capacity (gals / ML) | 1716 / 6.50 | 1600 / 6.06 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | / 1.80 | 450 / 1703 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 | 37 / 18.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 43.30 / 1100 | 43.75 / 1111 |
| Boiler Pressure (psi / kPa) | 213.20 / 14.70 | 210 / 14.50 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.96" x 22.05" / 380x560 | 13" x 22" / 330x559 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 22.83" x 22.05" / 580x560 | 21" x 22" / 533x559 |
| Tractive Effort (lbs / kg) | 28,898 / 13107.93 | 21,934 / 9949.11 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.65 | 6.04 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 115 - 2" / 51 | |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 16.50 / 5.03 | |
| Firebox Area (sq ft / m2) | 105.70 / 9.82 | 98 / 9.11 |
| Grate Area (sq ft / m2) | 16.68 / 1.55 | 16.30 / 1.51 |
| Evaporative Heating Surface (sq ft / m2) | 1037 / 96.33 | 1087 / 101.02 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1037 / 96.33 | 1087 / 101.02 |
| Evaporative Heating Surface/Cylinder Volume | 231.17 | 321.62 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3556 | 3423 |
| Same as above plus superheater percentage | 3556 | 3423 |
| Same as above but substitute firebox area for grate area | 22,535 | 20,580 |
| Power L1 | 2306 | 2738 |
| Power MT | 227.04 | 273.34 |