Unspecified Articulated Locomotives in Portugal

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 5851)

Since this information comes from a Czech-language website, I can only guess that this was a Henschel & Sohn design that was later enlarged to constitute the U 47 class on the Czech railways.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID5851
Number in Class
Road Numbers
Gauge75 cm
Number Built
BuilderHenschel & Sohn
Valve GearHeusinger
Locomotive Length and Weight
Driver Wheelbase (ft / m) 3.76 / 1.15
Engine Wheelbase (ft / m)13.12 / 4
Ratio of driving wheelbase to overall engine wheelbase 0.29
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)57,320 / 26,000
Engine Weight (lbs / kg)57,320 / 26,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)57,320 / 26,000
Tender Water Capacity (gals / ML)660 / 2.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)24 / 12
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)31.50 / 800
Boiler Pressure (psi / kPa)203.10 / 14
High Pressure Cylinders (dia x stroke) (in / mm)9.45" x 15.75" / 240x400
Low Pressure Cylinders (dia x stroke) (in / mm)14.57" x 15.75" / 370x400
Tractive Effort (lbs / kg)10,852 / 4922.39
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.28
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)10.01 / 0.93
Evaporative Heating Surface (sq ft / m2)485 / 45.10
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)485 / 45.10
Evaporative Heating Surface/Cylinder Volume379.33
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2033
Same as above plus superheater percentage2033
Same as above but substitute firebox area for grate area
Power L1
Power MT

All material Copyright © SteamLocomotive.com
Wes Barris