Data from E L Ahrons, "Locomotives of the Egyptian State Railways", Locomotive Magazine, Volume XXV [25]. (15 September 1919), pp. 157-160. 1-5 produced in 1889, 6 in 1890, 9 in 1895 and 10 in 1901.
Ahrons explained that the Cairo-Helouan was a private venture incorporated to serve a robust passenger clientele heading for the Helouan spas on the east side of the Nile. These four-coupled passenger tanks did the trick for years with enough success to prompt the railway to order two more at the turn of the century.
By that time, the Egyptian Light Railways had acquired the Cairo-Helouan and the ststaer
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 20745 |
| Railroad | Cairo-Helouan (Egyptian State) |
| Country | Egypt |
| Whyte | 2-4-0T |
| Number in Class | 8 |
| Road Numbers | 1-6, 9-10/1-8 |
| Gauge | Std |
| Number Built | 8 |
| Builder | Robert Stephenson & Co |
| Year | 1889 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.50 / 2.29 |
| Engine Wheelbase (ft / m) | 13.75 / 4.19 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.55 |
| Overall Wheelbase (engine & tender) (ft / m) | 13.75 / 4.19 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 30,464 / 13,818 |
| Weight on Drivers (lbs / kg) | 57,344 / 26,011 |
| Engine Weight (lbs / kg) | 83,112 / 37,699 |
| 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) | 48 / 24 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 66 / 1676 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.25" x 22" / 387x559 |
| Tractive Effort (lbs / kg) | 9225 / 4184.39 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.22 |
| 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 | 4361 |
| Power MT | 335.32 |