Data from E L Ahrons, "Thirty Years of Locomotive Progress in Egypt", Engineer, Volume 118 (11/27/1914), pp 499-501.
Ahrons pronounced this attractive Prairie tank design "excellent examples of the best present-day German locomotive practice, combined with British exterior neatness of design." Like most other British locomotives in Egypt, these had inside cylinders. But they broke with tradition by adopting radial valve gear instead of the Stephenson (Williams-Howe) link motion to actuate the inside piston valves.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Class 33 |
| Locobase ID | 20280 |
| Railroad | Egyptian State |
| Country | Egypt |
| Whyte | 2-6-2T |
| Number in Class | 12 |
| Road Numbers | 579-590 |
| Gauge | Std |
| Number Built | 12 |
| Builder | Henschel & Sohn |
| Year | 1911 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 15.75 / 4.80 |
| Engine Wheelbase (ft / m) | 32.48 / 9.90 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.48 |
| Overall Wheelbase (engine & tender) (ft / m) | 32.48 / 9.90 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 114,530 / 51,950 |
| Engine Weight (lbs / kg) | 170,693 / 77,425 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 170,693 / 77,425 |
| Tender Water Capacity (gals / ML) | 1896 / 7.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 64 / 32 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 65.90 / 1674 |
| Boiler Pressure (psi / kPa) | 179.80 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20.08" x 25.98" / 510x660 |
| Tractive Effort (lbs / kg) | 24,293 / 11019.13 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.71 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 136.70 / 12.70 |
| Grate Area (sq ft / m2) | 22.60 / 2.10 |
| Evaporative Heating Surface (sq ft / m2) | 1751 / 162.67 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1751 / 162.67 |
| Evaporative Heating Surface/Cylinder Volume | 183.88 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4063 |
| Same as above plus superheater percentage | 4063 |
| Same as above but substitute firebox area for grate area | 24,579 |
| Power L1 | 5049 |
| Power MT | 291.57 |