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Hungarian State Railways IIIs
The IIIs, designated class 322 from 1911, was designed for heavy passenger service. It was a four-cylinder compound 2-6-2 that used the same boiler and cylinder dimensions as the In (class 203) 4-4-2 express locomotiv...
General
| Property | Hungarian State Railways IIIs as built |
|---|---|
| Built | 1908-1909 |
| Manufacturers | MÁVAG |
| Wheel arrangement | 2-6-2 (Prairie) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Hungarian State Railways IIIs as built |
|---|---|
| Length | 19.67 m |
| Length loco | 11.67 m |
| Wheelbase | 9.15 m |
| Rigid wheelbase | 3.60 m |
| Total wheelbase | 16.24 m |
| Empty weight | 64.4 t |
| Service weight | 71.2 t |
| Adhesive weight | 43.1 t |
| Axle load | 14.4 t |
| Total weight | 125 t |
| Water capacity | 23,000 l |
| Fuel capacity | 8 t (coal) |
Boiler
| Property | Hungarian State Railways IIIs as built |
|---|---|
| Grate area | 3.91 m² |
| Firebox surface | 12.95 m² |
| Tube heating surface | 242.84 m² |
| Evaporative heating surface | 255.79 m² |
| Total heating surface | 255.8 m² |
Power plant
| Property | Hungarian State Railways IIIs as built |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 16 bar |
| Expansion type | compound |
| Cylinders | four, HP: 360 x 660 mm and LP: 620 x 660 mm |
Power
| Property | Hungarian State Railways IIIs as built |
|---|---|
| Power source | steam |
| Estimated power | 1,100 kW (1,496 PS) |
| Top speed | 90 km/h |
| Starting effort | 108.7 kN |
| Starting effort simple | 130.5 kN |
Calculated values
| Property | Hungarian State Railways IIIs as built |
|---|---|
| Factor of adhesion | 1 : 3.88 |
| Optimal speed | 61 km/h |
| Power-to-weight ratio | 15.4 kW/t |
| Heating Surface Equivalent | 320.5 m² |
| Cylinder volume/HSE | 1 : 1,040.80 |
| Adhesive weight/Total | 1 : 1.65 |
| Tractive force/Heating surface | 1 : 8.88 |
| Grate area/Heating surface | 1 : 65.42 |
| Firebox/Tube surface | 1 : 18.75 |
