Czech State Rwy 0-6-0 Locomotives in Czechoslovakia


Class Details by Steve Llanso of Sweat House Media

Class U 35.9 (Locobase 5850)

The works diagram reproduced on a Czech-language website is Locobase's only source of information for this little tank.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassU 35.9
Locobase ID5850
RailroadCzech State Rwy (CSD)
CountryCzechoslovakia
Whyte0-6-0T
Number in Class
Road Numbers
Gauge75 cm
Number Built
BuilderCKD
Year1948
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.22 / 2.20
Engine Wheelbase (ft / m) 7.22 / 2.20
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)38,691 / 17,550
Engine Weight (lbs / kg)38,691 / 17,550
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)38,691 / 17,550
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)21 / 10.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)27.60 / 700
Boiler Pressure (psi / kPa)188.50 / 13
High Pressure Cylinders (dia x stroke) (in / mm)10.83" x 14.17" / 275x360
Tractive Effort (lbs / kg)9648 / 4376.26
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.01
Heating Ability
Tubes (number - dia) (in / mm)82 - 1.85" / 47
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.22 / 2.20
Firebox Area (sq ft / m2)43.69 / 4.06
Grate Area (sq ft / m2)10.98 / 1.02
Evaporative Heating Surface (sq ft / m2)315 / 29.28
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)315 / 29.28
Evaporative Heating Surface/Cylinder Volume208.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2070
Same as above plus superheater percentage2070
Same as above but substitute firebox area for grate area8236
Power L13062
Power MT523.42

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