Magyar Allamvasutak 2-8-2 Locomotives in Hungary

Class Details by Steve Llanso of Sweat House Media

Class 40 (Locobase 1540)

Rack-system cylinders were 16.54" in diameter. Worlks numbers were 1782-1788 in 1908.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID1540
RailroadMagyar Allamvasutak (MAV)
Number in Class7
Road Numbers40.001-007
Number Built7
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.12 / 4.30
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)31,107 / 14,110
Weight on Drivers (lbs / kg)107,744 / 48,872
Engine Weight (lbs / kg)157,189 / 71,300
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)157,189 / 71,300
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41.30 / 1049
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)19.7" x 19.7" / 500x500
Tractive Effort (lbs / kg)27,379 / 12418.92
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.94
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)25.82 / 2.40
Evaporative Heating Surface (sq ft / m2)1784 / 165.80
Superheating Surface (sq ft / m2)568 / 52.79
Combined Heating Surface (sq ft / m2)2352 / 218.59
Evaporative Heating Surface/Cylinder Volume256.70
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4493
Same as above plus superheater percentage5571
Same as above but substitute firebox area for grate area
Power L1
Power MT

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