Gold Coast Railways 4-6-2 Locomotives in Ghana
Class Details by Steve Llanso of Sweat House Media
Class 261 (Locobase 7512)
Data from 1946 Beyer, Peacock catalogue hosted on Martyn Bane's website at [
] (accessed 21 May 2006).
Batch #1538 (works# 6911-6917) (Production data from The Beyer, Peacock production list -- [], last accessed 29 May 2006).
Lean, high-drivered Pacifics for Africa's Gold Coast. After World War II, the builder shipped one more 4-6-2 (works #7259); Locobase doesn't know if this lone engine was of the same design as the earlier set.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 261 |
| Locobase ID | 7512 |
| Railroad | Gold Coast Railways |
| Country | Ghana |
| Whyte | 4-6-2 |
| Number in Class | 7 |
| Road Numbers | 261-267 |
| Gauge | 3'6" |
| Number Built | 7 |
| Builder | Beyer, Peacock |
| Year | 1939 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11 / 3.35 |
| Engine Wheelbase (ft / m) | 20.17 / 6.15 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.55 |
| Overall Wheelbase (engine & tender) (ft / m) | 53.58 / 16.33 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 28,000 / 12,701 |
| Weight on Drivers (lbs / kg) | 83,664 / 37,949 |
| Engine Weight (lbs / kg) | 142,128 / 64,468 |
| Tender Loaded Weight (lbs / kg) | 99,232 / 45,011 |
| Total Engine and Tender Weight (lbs / kg) | 241,360 / 109,479 |
| Tender Water Capacity (gals / ML) | 4800 / 18.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8.40 / 8 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 46 / 23 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 26" / 406x660 |
| Tractive Effort (lbs / kg) | 16,973 / 7698.83 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.93 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 136 / 12.63 |
| Grate Area (sq ft / m2) | 25 / 2.32 |
| Evaporative Heating Surface (sq ft / m2) | 1358 / 126.16 |
| Superheating Surface (sq ft / m2) | 336 / 31.22 |
| Combined Heating Surface (sq ft / m2) | 1694 / 157.38 |
| Evaporative Heating Surface/Cylinder Volume | 224.45 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4500 |
| Same as above plus superheater percentage | 5400 |
| Same as above but substitute firebox area for grate area | 29,376 |
| Power L1 | 15,059 |
| Power MT | 1190.45 |