Data fromData from Bruce (1952), supplemented and corrected by Canadian Transportation & Distribution Management, November 1950. (Thanks to Teemu Koivumaki for his 2 January 2021 supplying the road numbers and thus the number built.) Works numbers were 75615-75634 in February 1948.
One of the last steam locomotives built by Montreal, this Ten-Wheeler had a lean, spread-out axle spacing and high -pitched boiler. Its firebox heating surface included 28 sq ft (2.6 sq m) of thermic syphons.
Data from "Siz-Coupled Bogie Express Engine for Egyptian Government Railways," The Locomotive Magazine, Vol XIV (15 July 1908), p. 123. See also E L Ahrons, "Thirty Years of Locomotive Progress in Egypt", Engineer, Volume 118 (27 November 1914), pp 499-501. Works numbers were 18053-18062 in 1908.
In Locobase 10611, we discuss the feedwater heater that was the distinguishing feature of that 4-4-0 class. This slightly later class of Ten-wheeler express locomotives had the same installation. Ahrons commented that the ESR's experience with a 4-6-0 tended "to show that this class consumes too much fuel, and that in view of the fact that in that country there are no gradients, its perpetuation is hardly necessary; at all events, with present-day loads."
By the end of 1911, the class had averaged a coal consumption of 49.2 lb/mile (13.86 kg/km) over 985,210 miles (1,586,288 km).
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 340 | Class 31/Abbas Hilmy |
Locobase ID | 5046 | 10660 |
Railroad | Egyptian State | Egyptian State |
Country | Egypt | Egypt |
Whyte | 4-6-0 | 4-6-0 |
Number in Class | 20 | 10 |
Road Numbers | 341-360 | 725 |
Gauge | Std | Std |
Number Built | 20 | 10 |
Builder | Montreal LW | North British |
Year | 1948 | 1908 |
Valve Gear | Walschaert | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 15 / 4.57 | 14 / 4.27 |
Engine Wheelbase (ft / m) | 27.50 / 8.38 | 27.50 / 8.38 |
Ratio of driving wheelbase to overall engine wheelbase | 0.55 | 0.51 |
Overall Wheelbase (engine & tender) (ft / m) | 61.61 / 18.78 | 53.25 / 16.23 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 38,528 / 17,476 | |
Weight on Drivers (lbs / kg) | 145,500 / 65,998 | 115,472 / 52,377 |
Engine Weight (lbs / kg) | 197,000 / 89,358 | 153,664 / 69,701 |
Tender Loaded Weight (lbs / kg) | 138,000 / 62,596 | 97,664 / 44,300 |
Total Engine and Tender Weight (lbs / kg) | 335,000 / 151,954 | 251,328 / 114,001 |
Tender Water Capacity (gals / ML) | 6600 / 25 | 4800 / 18.18 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2700 / 10219.50 | 6.60 / 6 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 81 / 40.50 | 64 / 32 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 72 / 1829 | 75 / 1905 |
Boiler Pressure (psi / kPa) | 229.20 / 1580 | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 28" / 533x711 | 19" x 26" / 483x660 |
Tractive Effort (lbs / kg) | 33,412 / 15155.45 | 19,147 / 8684.94 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.35 | 6.03 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 148 - 2" / 51 | 257 - 2" / 51 |
Flues (number - dia) (in / mm) | 32 - 5.375" / 137 | |
Flue/Tube length (ft / m) | 14 / 4.27 | 15.96 / 4.86 |
Firebox Area (sq ft / m2) | 228 / 21.18 | 172 / 15.98 |
Grate Area (sq ft / m2) | 32.80 / 3.05 | 28.80 / 2.68 |
Evaporative Heating Surface (sq ft / m2) | 1933 / 179.58 | 2321 / 215.63 |
Superheating Surface (sq ft / m2) | 446 / 41.43 | |
Combined Heating Surface (sq ft / m2) | 2379 / 221.01 | 2321 / 215.63 |
Evaporative Heating Surface/Cylinder Volume | 172.21 | 272.03 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 7518 | 5184 |
Same as above plus superheater percentage | 8946 | 5184 |
Same as above but substitute firebox area for grate area | 62,187 | 30,960 |
Power L1 | 17,365 | 8389 |
Power MT | 789.34 | 480.49 |