Egyptian Delta Light Railway 4-4-0 Locomotives in Egypt

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 9243)

Data from James Albert Wells Peacock, Light Railways in Egypt (Cassier's Magazine 1901-1902, pp 373-384). Also see Allan C Baker, "Baguley Locomotive Valve Gears", The Industrial Railway Record (No 11, September 1966), pp 264-270.

The author was the Chief Engineer of the Delta Railways project. The locomotives shown in this entry were meant to support an ambitious light railway network in Egypt that began construction in the late 1890s and was meant to aggregate 500 miles (800 km). The first section in Behera was opened in 1898 and by 1935 the network had grown beyond the original target to 620 miles (1000 km).

It was certainly a light railway: the rails themselves came in at 30-lb/yard (15 kg/meter) and the profile was delta-flat. The longest grade ran only 30 chains and the steepest grade measured only 1%.

As delivered, the first 10 had Stephenson link motion inside, but there simply wasn't enough space. So Bagnalls applied the link motion developed and patented by their chief draughtsman, Mr E. E. Baguley. According to Allan Baker:

The gear is of the rocking sector type but the motion of the sector is obtained in an ingenious way. On the crankpin between the coupling and connecting rods is a third rod, on the other end of which is attached a forked link swinging on a fixed centre. The ends of this link are formed circular but offset to the pivots. On these circular bosses the sector is oscillated by a second link from the rod to an extension to the rear of the sector. Thus, the forked link imparts the lap and lead motion by swinging the link bodily on the pivots and the valve travel proper is given by the second link; the motion is then transferred to the valve in the usual manner by the die block and the radius rod."

The class was quite successful and long-lived.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID9243
RailroadEgyptian Delta Light Railway
Number in Class35
Road Numbers
Gauge75 cm
Number Built35
BuilderWG Bagnall
Valve GearBagueley
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52
Engine Wheelbase (ft / m)13.50 / 4.11
Ratio of driving wheelbase to overall engine wheelbase 0.37
Overall Wheelbase (engine & tender) (ft / m)13.50 / 4.11
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)33,600 / 15,241
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)33,600 / 15,241
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)30 / 762
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)9.5" x 14" / 241x356
Tractive Effort (lbs / kg)5012 / 2273.41
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)30 / 2.79
Grate Area (sq ft / m2)5 / 0.46
Evaporative Heating Surface (sq ft / m2)354 / 32.90
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)354 / 32.90
Evaporative Heating Surface/Cylinder Volume308.21
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation700
Same as above plus superheater percentage700
Same as above but substitute firebox area for grate area4200
Power L13072
Power MT

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