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 | |
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Class | 11 |
Locobase ID | 1537 |
Railroad | Magyar Allamvasutak (MAV) |
Country | Hungary |
Whyte | 2-2-0T |
Number in Class | 31 |
Road Numbers | |
Gauge | Std |
Number Built | 31 |
Builder | MAVAG |
Year | 1910 |
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 Volume | 515.96 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2249 |
Same as above plus superheater percentage | 2631 |
Same as above but substitute firebox area for grate area | |
Power L1 | |
Power MT |