Latvian State Railway 2-2-2 Locomotives in Latvia

Class Details by Steve Llanso of Sweat House Media

Class Tk (Locobase 1304)

Data from Bogdan Pokropinski, "Die Lokomotiv-Serie Tk dre Lettischen Staatland", Die Museums-Eisenbahn 3/1989, pp. 6-7.

The first three Tks were built by Hohenzollern (works numbers 4635-4637) in 1928. Krupp supplied the next 3 in 1931 (works numbers 1196-1198) at the same time Henschel & Sohn produced 3 more. The others were Latvian-built. Daugavpils and Lepala in Latvia supplied 10 in 1933-1934.

The locomotive's layout included large-diameter leading wheels under the smokebox, the cylinders under the running board between the leading axle and the single powered axle under the firebox. The trailing axle used a Bissel truck and supported the cab and bunker.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID1304
RailroadLatvian State Railway
Number in Class5
Road NumbersTk-233-237
Number Built5
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)34,496 / 15,647
Engine Weight (lbs / kg)83,328 / 37,797
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)83,328 / 37,797
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)57 / 28.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)59.10 / 1500
Boiler Pressure (psi / kPa)203.10 / 14
High Pressure Cylinders (dia x stroke) (in / mm)12.6" x 20.47" / 320x520
Tractive Effort (lbs / kg)9493 / 4305.96
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.63
Heating Ability
Tubes (number - dia) (in / mm)55 - 1.772" / 45
Flues (number - dia) (in / mm)26 - 4.173" / 106
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)11.84 / 1.10
Evaporative Heating Surface (sq ft / m2)556 / 51.70
Superheating Surface (sq ft / m2)235 / 21.84
Combined Heating Surface (sq ft / m2)791 / 73.54
Evaporative Heating Surface/Cylinder Volume188.21
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2405
Same as above plus superheater percentage3126
Same as above but substitute firebox area for grate area
Power L1
Power MT

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