Data from "New Goods Engine, Egyptian State Railways," The Locomotive Magazine, Volume VIII (21 Feb 1903), p. 133. See also "Competition of American and English Locomotives in Egypt", Railway and Locomotive Engineering, Volume 14, No 8 (August 1901), p.341; "Egyptian Experimental Locomotives", Engineer, Volume 93 (7 February 1902), pp. 137-138.the extended series "The Egyptian Government Railways and Locomotives" beginning on 20 June 1903, pp. 430-432;
The ESR's F H Trevithick was a highly respected locomotive superintendent from a well-known locomotive family. His perception of the need for more power led to his design and purchase of this powerful class. The Belpaire firebox, low running board, outside cylinders with tail rods created a burly look.
Trevithick chose to purchase one 2-8-0 from Dubs and one from the American company Brooks Locomotive Works of Dunkirk, NY.
Data from "Consolidation Locomotive, Egyptian State Ry," The Locomotive Magazine, Vol VIII, No 110 (27 June 1903), p. 444 . See also the extended series "The Egyptian Government Railways and Locomotives" beginning on 20 June 1903, pp. 430-432; and "Egyptian Experimental Locomotives", Engineer, Volume 93 (7 February 1902), pp. 137-138. Works number was 3518 in May 1900.
Compared to the Dubs engines that arrived in Egypt in the same year (Locobase 10279), this design was just a bit smaller. The Belpaire firebox was noticeable as was the long main rod that reached to the third coupled axle. 21.7 sq ft (2 sq m) of the firebox heating surface came from arch tubes.
Data from [], a reprint of the Vulcan magazine last accessed 14 July 2007.
The article describes these as being very similar to those of the War Department then operating in Egypt and a comparison of the data shows that they were nearly identical. The Belpaire firebox was fitted with a single Nicholson thermic syphon.
NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface
| Principal Dimensions by Steve Llanso of Middle Run Media | |||
|---|---|---|---|
| Class | Class 11 | Class 12 | unknown |
| Locobase ID | 10279 | 10347 | 8581 |
| Railroad | Egyptian State | Egyptian State | Egyptian State |
| Country | Egypt | Egypt | Egypt |
| Whyte | 2-8-0 | 2-8-0 | 2-8-0 |
| Number in Class | 1 | 20 | |
| Road Numbers | 701 | 700/101/16 | |
| Gauge | Std | Std | Std |
| Number Built | 1 | 20 | |
| Builder | Dubs & Co | Brooks | Vulcan Foundry |
| Year | 1900 | 1900 | 1952 |
| Valve Gear | Stephenson | Stephenson | Walschaert |
| Locomotive Length and Weight | |||
| Driver Wheelbase (ft / m) | 16.42 / 5 | 15.50 / 4.72 | 17.25 / 5.26 |
| Engine Wheelbase (ft / m) | 24.92 / 7.60 | 24.17 | 25.92 / 7.90 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.66 | 0.64 | 0.67 |
| Overall Wheelbase (engine & tender) (ft / m) | |||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,280 / 16,003 | ||
| Weight on Drivers (lbs / kg) | 132,384 / 60,048 | 129,920 / 58,931 | 145,600 / 66,043 |
| Engine Weight (lbs / kg) | 145,824 / 66,145 | 148,960 / 67,567 | 169,344 / 76,813 |
| Tender Loaded Weight (lbs / kg) | 89,040 / 40,388 | 89,600 / 40,642 | 158,144 / 71,733 |
| Total Engine and Tender Weight (lbs / kg) | 234,864 / 106,533 | 238,560 / 108,209 | 327,488 / 148,546 |
| Tender Water Capacity (gals / ML) | 4800 / 18.18 | 4800 / 18.18 | 6600 / 25 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2880 / 10,901 | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 55 / 27.50 | 54 / 27 | 61 / 30.50 |
| Geometry Relating to Tractive Effort | |||
| Driver Diameter (in / mm) | 54 / 1372 | 54 / 1372 | 56.50 / 1435 |
| Boiler Pressure (psi / kPa) | 180 / 1240 | 180 / 1240 | 225 / 1550 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 26" / 533x660 | 20" x 26" / 508x660 | 18.5" x 28" / 470x711 |
| Tractive Effort (lbs / kg) | 32,487 / 14735.87 | 29,467 / 13366.02 | 32,438 / 14713.65 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.07 | 4.41 | 4.49 |
| Heating Ability | |||
| Tubes (number - dia) (in / mm) | 260 - 2" / 51 | 202 - 1.75" / 44 | |
| Flues (number - dia) (in / mm) | 21 - 5.25" / 133 | ||
| Flue/Tube length (ft / m) | 14.58 | 12.33 / 3.76 | |
| Firebox Area (sq ft / m2) | 176.80 / 16.43 | 166 / 15.43 | 177 / 16.45 |
| Grate Area (sq ft / m2) | 30 / 2.79 | 21.70 / 2.02 | 30 / 2.79 |
| Evaporative Heating Surface (sq ft / m2) | 2201 / 204.48 | 2134 / 198.33 | 1659 / 154.18 |
| Superheating Surface (sq ft / m2) | 174 / 16.17 | ||
| Combined Heating Surface (sq ft / m2) | 2201 / 204.48 | 2134 / 198.33 | 1833 / 170.35 |
| Evaporative Heating Surface/Cylinder Volume | 211.17 | 225.73 | 190.44 |
| Computations Relating to Power Output (More Information) | |||
| Robert LeMassena's Power Computation | 5400 | 3906 | 6750 |
| Same as above plus superheater percentage | 5400 | 3906 | 7358 |
| Same as above but substitute firebox area for grate area | 31,824 | 29,880 | 43,409 |
| Power L1 | 4795 | 5079 | 9996 |
| Power MT | 319.41 | 344.74 | 605.42 |