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MÁV Class M44

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(Redirected from PKP class SM41)
MÁV M44
M44.072
Type and origin
Power typeDiesel
BuilderGanz–MÁVAG
ModelDVM-2
Build date1954–1976
Total produced926
Specifications
Configuration:
 • AARB-B
 • UICBo′Bo′
Gauge1,435 mm (4 ft 8+12 in)
Wheel diameter1,040 mm (40.94 in)
Length11,278 mm (37 ft 0 in)
Width3,132 mm (10 ft 3 in)
Height4440 mm
Loco weight62 t (136,700 lb)
Fuel capacity1 t
Prime moverGanz–Jendrassik XVI Jv 170/240
AspirationNaturally aspirated
Cylinders16
Cylinder size170×240 mm
TransmissionElectric
Loco brakeKnorr
Train brakesAir
Performance figures
Maximum speed80 km/h (50 mph)
Power output441 kW (590 hp)
Tractive effort182.6 kN (41,050 lbf)
Career
OperatorsMÁV, MÁV-HÉV, PKP, BDŽ, HŽ, ŽS
ClassM44 (MÁV); SM40-SM41 (PKP)
Number in class195 (MÁV), 273 (PKP), 132 (BDŽ),

MÁV Class M44 is a Hungarian shunting engine built from 1954 to 1971, and used by multiple railways, including Hungarian State Railways (MÁV), Polish State Railways (PKP), Bulgarian State Railways (BDŽ), Yugoslav Railways (JŽ), and some industrial railways in the former countries of the Eastern Bloc.

All versions used the Ganz–Jendrassik XVI Jv 170/240 V16 4-stroke naturally aspirated diesel engine producing 600 HP (420 kW).

History

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The Hungarian railway system was in a very bad shape after the ending of the war, and modernisation became important for MÁV. Ganz has built 2 generator locomotives for the suburban electrified railways during the war. MÁV needed a heavy shunting locomotive to replace the previously used old and obsolete steam locomotives, with relatively high power and acceleration. Ganz has designed a diesel electric locomotive with the then-biggest series built engine made by them, the Ganz XVI Jv 170/240. The first 2 prototypes were built in 1954, and they got the designation M424 5001 and 5002. After the good results of the tests, mass production had started. Other railways bought from this design, with similar results. After nearly 70 years, the original prototypes are still operational, and the class is still in active service, albeit with decreasing numbers.

References

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  • SM40/41
  • Translated from the Hungarian article.

See also

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