Ottoman Railway 0-8-2 Locomotives in Turkey

Class Details by Steve Llanso of Sweat House Media

Class 65/4501 (Locobase 20050)

Data from "New Tank Locomotives, Ottoman Railway (Smyrna, Aidin, Diner)", Locomotive Magazine, Volume 18 (15 January 1912), p. 4. See also Trains of Turkey website at [], last accessed 25 January 2016. Works numbers were 3416-3418.

A large "banking" (helper) engine with Belpaire firebox and small tanks, this large trio headed for the only English-owned railway remaining in Asia Minor (Turkey). They repeated the 1906 0-8-0 design (Locobase 1623) in many respects, but sacrificed some fuel and water capacity for a shorter wheelbase.

The locomotives were both powerful and durable, remaining in service both on the ORC and its successor, the Turkish State Railway, for decades.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20050
RailroadOttoman Railway
Number in Class3
Road Numbers65-67/4501-4503
Number Built3
BuilderRobert Stephenson & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)17.81 / 5.43
Engine Wheelbase (ft / m)25.82 / 7.87
Ratio of driving wheelbase to overall engine wheelbase 0.69
Overall Wheelbase (engine & tender) (ft / m)25.82 / 7.87
Axle Loading (Maximum Weight per Axle) (lbs / kg)37,479 / 17,000
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)176,513 / 80,065
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)176,513 / 80,065
Tender Water Capacity (gals / ML)2281 / 8.64
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54.50 / 1384
Boiler Pressure (psi / kPa)179.80 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19.49" x 25.98" / 495x660
Tractive Effort (lbs / kg)27,674 / 12552.73
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)152.31 / 14.15
Grate Area (sq ft / m2)25.40 / 2.36
Evaporative Heating Surface (sq ft / m2)1755 / 163.06
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1755 / 163.06
Evaporative Heating Surface/Cylinder Volume195.63
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4567
Same as above plus superheater percentage4567
Same as above but substitute firebox area for grate area27,385
Power L14581
Power MT

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