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Hungarian State Railways class 424
The MÁV series 424 was a 4-8-0 mixed traffic locomotive that wasn't only a success in Hungary, but also in other countries. It was based on the Südbahn class 570 and also had a high boiler that had enough space for a ...
General
| Property | Hungarian State Railways class 424Remove |
|---|---|
| Built | 1924, 1940-1958 |
| Manufacturers | MÁVAG |
| Wheel arrangement | 4-8-0 (Twelve-wheeler) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Hungarian State Railways class 424Remove |
|---|---|
| Wheelbase | 9.50 m |
| Rigid wheelbase | 3.60 m |
| Total wheelbase | 17.34 m |
| Empty weight | 73.1 t |
| Service weight | 82.3 t |
| Adhesive weight | 56.5 t |
| Axle load | 14.2 t |
| Total weight | 139.9 t |
| Water capacity | 24,600 l |
| Fuel capacity | 9 t (coal) |
Boiler
| Property | Hungarian State Railways class 424Remove |
|---|---|
| Grate area | 4.48 m² |
| Firebox surface | 17.3 m² |
| Tube heating surface | 199.1 m² |
| Evaporative heating surface | 216.4 m² |
| Superheater surface | 55.7 m² |
| Total heating surface | 272.1 m² |
Power plant
| Property | Hungarian State Railways class 424Remove |
|---|---|
| Driver diameter | 1,610 mm |
| Boiler pressure | 14 bar |
| Expansion type | simple expansion |
| Cylinders | two, 600 x 660 mm |
Power
| Property | Hungarian State Railways class 424Remove |
|---|---|
| Power source | steam |
| Indicated power | 1,250 kW (1,700 PS) |
| Top speed | 90 km/h |
| Starting effort | 175.6 kN |
Calculated values
| Property | Hungarian State Railways class 424Remove |
|---|---|
| Factor of adhesion | 1 : 3.16 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 15.2 kW/t |
| Heating Surface Equivalent | 414.3 m² |
| Cylinder volume/HSE | 1 : 900.85 |
| Adhesive weight/Total | 1 : 1.46 |
| Tractive force/Heating surface | 1 : 13.48 |
| Grate area/Heating surface | 1 : 60.74 |
| Firebox/Tube surface | 1 : 11.51 |
| Total/Superheater | 1 : 3.89 |
