Egyptian State 2-6-2 Locomotives in Egypt

Class Details by Steve Llanso of Sweat House Media

Class Class 33 (Locobase 20280)

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 Sweat House Media

ClassClass 33
Locobase ID20280
RailroadEgyptian State
Number in Class12
Road Numbers579-590
Number Built12
BuilderHenschel & Sohn
Valve GearWalschaert
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 / 12.40
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 Volume183.88
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4063
Same as above plus superheater percentage4063
Same as above but substitute firebox area for grate area24,579
Power L15049
Power MT291.57

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