| MÁV class 424 |
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| Type and origin |
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| Power type | Steam |
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| Build date | 1924–1958 |
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| Total produced | 514 |
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| Specifications |
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Configuration:
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| • Whyte | 4-8-0 |
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| • UIC | 2′D h2 |
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| Gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
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| Driver dia. | 1,606 mm (63.23 in) |
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| Length | 20.79 m (68 ft 3 in) |
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| Loco weight | 83.2 tonnes
(81.9 long tons; 91.7 short tons) |
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| Total weight | 137.7 tonnes
(135.5 long tons; 151.8 short tons) |
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| Firebox: | |
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| • Grate area | 4.45 m2 (47.9 sq ft) |
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| Boiler pressure | 13 kg/cm2 (1.27 MPa; 185 psi) |
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| Heating surface | 162.6 m2 (1,750 sq ft) |
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Superheater:
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| • Heating area | 68 m2 (730 sq ft) |
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| Cylinder size | 600 mm × 660 mm
(23.62 in × 25.98 in) |
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| Performance figures |
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| Maximum speed | 90 km/h |
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The MÁV class 424 is a famous class of Hungarian steam locomotives. The class appears in numerous nostalgic remembrances, in literature, in the movies and as models. The 424 class is a double-chimneyed, superheated machine. Its nicknames were "Buffalo" and "Nurmi" (after Paavo Nurmi, a famous Finnish runner well known in Hungary).
Locomotives of the same design operated in Yugoslavia as JŽ class 11.
Fifteen were supplied to North Korea as war aid during the Korean War; these kept their MÁV running numbers (424.006 through 424.020) in Korean State Railway service. These went to Záhony on the Hungarian–Soviet border under their own power, where they were disassembled and shipped via the USSR to China; in China they were reassembled and delivered to North Korea under their own power.
