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Hungarian State Railways class 242
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 ...
General
| Property | Hungarian State Railways class 242Remove |
|---|---|
| Built | 1936, 1940 |
| Manufacturers | MÁVAG |
| Wheel arrangement | 4-4-4T (Reading) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Hungarian State Railways class 242Remove |
|---|---|
| Length | 14.28 m |
| Wheelbase | 10.89 m |
| Rigid wheelbase | 2.19 m |
| Empty weight | 65.4 t |
| Service weight | 85.4 t |
| Adhesive weight | 29.2 t |
| Axle load | 14.7 t |
| Water capacity | 10,000 l |
| Fuel capacity | 4.5 t (coal) |
Boiler
| Property | Hungarian State Railways class 242Remove |
|---|---|
| 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
| Property | Hungarian State Railways class 242Remove |
|---|---|
| Driver diameter | 2,000 mm |
| Boiler pressure | 18 bar |
| Expansion type | simple expansion |
| Cylinders | two, 430 x 650 mm |
Power
| Property | Hungarian State Railways class 242Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,100 kW (1,496 PS) |
| Top speed | 120 km/h |
| Starting effort | 91.9 kN |
Calculated values
| Property | Hungarian State Railways class 242Remove |
|---|---|
| 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 |
