Data from E L Ahrons, "Locomotives of the Egyptian State Railways", Locomotive Magazine, Volume XXV [25]. (15 September 1919), pp. 157-160. 7 was produced in 1891 and 8 in 1894.
Spurred by the increasing demand for stone from the Tourab quarries, the Cairo-Helouan ordered two six-coupled goods locomotives that duplicated all of the major dimensions and areas of the passenger 2-4-0 tanks shown in Locobase 20745. The only significant differences--driver diameters reduced by a striking 18" (457 mm) and a 33% increase in adhesion weight.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 7 |
| Locobase ID | 20746 |
| Railroad | Cairo-Helouan (Egyptian State) |
| Country | Egypt |
| Whyte | 0-6-0T |
| Number in Class | 2 |
| Road Numbers | 7-8/505-506 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Robert Stephenson & Co |
| Year | 1891 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.75 / 4.19 |
| Engine Wheelbase (ft / m) | 13.75 / 4.19 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 13.75 / 4.19 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 31,584 / 14,326 |
| Weight on Drivers (lbs / kg) | 60,928 / 27,637 |
| Engine Weight (lbs / kg) | 83,664 / 37,949 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 816 / 3.09 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.40 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 34 / 17 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.25" x 22" / 387x559 |
| Tractive Effort (lbs / kg) | 12,684 / 5753.37 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.80 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 82 / 7.62 |
| Grate Area (sq ft / m2) | 17.75 / 1.65 |
| Evaporative Heating Surface (sq ft / m2) | 907 / 84.26 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 907 / 84.26 |
| Evaporative Heating Surface/Cylinder Volume | 195.02 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2485 |
| Same as above plus superheater percentage | 2485 |
| Same as above but substitute firebox area for grate area | 11,480 |
| Power L1 | 3172 |
| Power MT | 344.33 |