Ottomans d'Anatolie 2-6-0 Locomotives in Turkey

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 20703)

Data from A[nthony] E[dward] Durrant, The Steam Locomotives of Eastern Europe (Newton Abbot:David & Charles, 1966). Additional data from [] (25 December 2003, updated with [], last accessed 26 December 2021).

These engines were built in two batches. Hanomag and Henschel delivered 201-211 to the Chemin de Fer de Ottoman Anatolien (CFOA) and 611-622 to the Baghdad Railway. (623-626, 631-633 followed in 1914).

To reduce the axle loading to a more acceptable 13,500 kg (29,762 lb), machinists on the CFOA inserted on some of the locomotives a small carrying axle between the second and third set of drivers, which were widely spaced. These then could be described as 2-6-(2)-0, wrote Durrant. (Given where it was, perhaps 2-4-(2)-2-0 might better represent the odd placement.) At the very least, 1-2, 4, 6-7, 9, and 11used the carrying axle.

In any event, those modified carried the axle to the end of steam. This class was later redesignated 34.001-018 and 34.046-048.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20703
RailroadOttomans d'Anatolie
Number in Class
Road Numbers201-211,
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.12 / 4
Engine Wheelbase (ft / m)20.77 / 6.33
Ratio of driving wheelbase to overall engine wheelbase 0.63
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)34,172 / 15,500
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)104,940 / 47,600
Tender Loaded Weight (lbs / kg)91,051 / 41,300
Total Engine and Tender Weight (lbs / kg)195,991 / 88,900
Tender Water Capacity (gals / ML)4279 / 16.21
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 6.20 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)52.40 / 1330
Boiler Pressure (psi / kPa)145 / 10
High Pressure Cylinders (dia x stroke) (in / mm)16.93" x 24.8" / 430x630
Tractive Effort (lbs / kg)16,719 / 7583.62
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)107.64 / 10
Grate Area (sq ft / m2)23.03 / 2.14
Evaporative Heating Surface (sq ft / m2)1435 / 133.29
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1435 / 133.29
Evaporative Heating Surface/Cylinder Volume222.08
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3339
Same as above plus superheater percentage3339
Same as above but substitute firebox area for grate area15,608
Power L13867
Power MT

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