Hungarian State Railways class 242
Hungary 1936 4 produced
Since the expected number of passengers in express traffic in the 1930s was low and the existing tracks did not allow high axle loads anyway, the Hungarian State Railways developed a light streamlined tank locomotive. With one bogie in front and one behind, the four locomotives were allowed to travel 120 km/h in both directions. A speed of 152 km/h was reached during a test drive and in 1961, after the installation of a double blast pipe, even 160 km/h were reached. As with German streamlined locomotives, the panels were later cut out in the area of the wheels.
Technical data
General
- Built
- 1936, 1940
- Manufacturers
- MÁVAG
- Wheel arrangement
- 4-4-4T (Reading)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 14.28 m
- Wheelbase
- 10.89 m
- Empty mass
- 65.4 t
- Service mass
- 85.4 t
- Adhesion mass
- 29.2 t
- Rigid wheelbase
- 2.19 m
- Axle load
- 14.7 t
- Water capacity
- 10,000 l
- Fuel capacity
- 4.5 t (coal)
Boiler
- Grate area
- 2.75 m²
- Firebox surface
- 12.4 m²
- Tube heating surface
- 107.8 m²
- Evaporative heating surface
- 120.2 m²
- Superheater surface
- 43 m²
- Total heating surface
- 163.2 m²
Power plant
- Driver diameter
- 2,000 mm
- Boiler pressure
- 18 bar
- Expansion type
- simple expansion
- Cylinders
- two, 430 x 650 mm
Power
- Power source
- steam
- Estimated power
- 1,100 kW (1,496 PS)
- Top speed
- 120 km/h
- Starting effort
- 91.9 kN
Calculated values
- Factor of adhesion
- 1 : 3.12
- Optimal speed
- 72 km/h
- Power-to-weight ratio
- 12.9 kW/t
- Heating Surface Equivalent
- 268.2 m²
- Cylinder volume/HSE
- 1 : 703.90
- Adhesive weight/Total
- 1 : 2.92
- Tractive force/Heating surface
- 1 : 11.77
- Grate area/Heating surface
- 1 : 59.35
- Firebox/Tube surface
- 1 : 8.69
- Total/Superheater
- 1 : 2.80
