Magyar Allamvasutak 2-2-0 Locomotives in Hungary


Class Details by Steve Llanso of Sweat House Media

Class 11 (Locobase 1537)

As small as they were, these little engines operated on the standard gauge pulling light passenger trains. Known as motoropotlo, which in Hungarian conveys the stocky image conveyed by a locomotive of such short length but standard width. They also were fitted with the first examples of the Brotan boiler, a boiler design described in more detail in Locobase 1580.

Principal Dimensions by Steve Llanso of Middle Run Media
Class11
Locobase ID1537
RailroadMagyar Allamvasutak (MAV)
CountryHungary
Whyte2-2-0T
Number in Class31
Road Numbers
GaugeStd
Number Built31
BuilderMAVAG
Year1910
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)21,275 / 9650
Engine Weight (lbs / kg)42,770 / 19,400
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)35 / 17.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40.90 / 1040
Boiler Pressure (psi / kPa)232.10 / 1600
High Pressure Cylinders (dia x stroke) (in / mm)8.66" x 15.75" / 220x400 (1)
Low Pressure Cylinders (dia x stroke) (in / mm)12.99" x 15.75" / 330x400 (1)
Tractive Effort (lbs / kg)3944 / 1788.97
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.39
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) 9.69 / 0.90
Evaporative Heating Surface (sq ft / m2)277 / 25.70
Superheating Surface (sq ft / m2)56 / 5.20
Combined Heating Surface (sq ft / m2)333 / 30.90
Evaporative Heating Surface/Cylinder Volume515.96
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2249
Same as above plus superheater percentage2631
Same as above but substitute firebox area for grate area
Power L1
Power MT

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