MÁV Class 601

MÁV class 601

MÁV 601

Type and origin Power type Steam Builder MÁVAG Build date 1914–1921 Total produced 60

Specifications Configuration 2-6-6-0 UIC class (1'C)C Gauge 1,435 mm (4 ft 8 ^1⁄2 in) standard gauge Leading dia. 950 mm (37.40 in) Driver dia. 1,440 mm (56.69 in) Axle load 15.78 tonnes (15.53 long tons; 17.39 short tons) Loco weight Empty Engine: 99.8 tonnes (98.2 long tons; 110.0 short tons) (without water and coal) Tender weight 53.1 tonnes (52.3 long tons; 58.5 short tons) Total weight in driving condition: 163.32 tonnes (160.74 long tons; 180.03 short tons) Fuel type Coal Fuel capacity 8 tonnes (7.9 long tons; 8.8 short tons) Water cap 26 m^3 (5,700 imp gal) Firebox:  • Firegrate area 5.24 m^2 (56.4 sq ft) Boiler pressure 15.5 kg/cm^2 (1.52 MPa; 220 psi) Heating surface 252 m^2 (2,710 sq ft) Superheater: ​  • Heating area 87.3 m^2 (940 sq ft) Cylinders Four, outside Cylinder stroke: 660 mm (26 in) Front cylinder for high pressure: 520 mm × 520 mm (20.47 in × 20.47 in) Rear cylinder for low pressure: 800 mm × 800 mm (31.50 in × 31.50 in)

Performance figures Power output Most Efficient: 1,550 hp (1,160 kW) Maximal: 2,950 hp (2,200 kW) Tractive effort 218.76 kN (49,179.20 lbf)

The MÁV class 601 (nicknamed as "The Giant" or "Big boy" ) is a class of Hungarian four cylinder Mallet -type locomotives, which was designed to haul long and very heavy cargo on very steep railway tracks.^[1] With their 22.5 meter length and 2200 KW power,^[2] they were the largest and most powerful steam locomotives which have ever built before (and during) the First World War in Europe.^[3]

Based on the good operating experience with the series 651 more powerful locomotives arose at the MÁVAG in Budapest from 1914 on, which were especially provided for the line from Karlstadt ( today: Karlovac, Croatia) to Fiume (today: Rijeka). By utilisation of the permitted axial load of 16,5t a locomotive was developed, which alone could move freighttrains uphill even on the steep line in the croatian karst without a banking engine.

Allowed train loads of Class 601 engines
Angle of elevation	15 km/h (9.3 mph)	20 km/h (12 mph)	25 km/h (16 mph)	30 km/h (19 mph)	40 km/h (25 mph)	45 km/h (28 mph)	50 km/h (31 mph)	60 km/h (37 mph)
0‰	5,950 tonnes (5,860 long tons; 6,560 short tons)	5,550 tonnes (5,460 long tons; 6,120 short tons)	5,057 tonnes (4,977 long tons; 5,574 short tons)	4,650 tonnes (4,580 long tons; 5,130 short tons)	3,770 tonnes (3,710 long tons; 4,160 short tons)	3,160 tonnes (3,110 long tons; 3,480 short tons)	2,610 tonnes (2,570 long tons; 2,880 short tons)	1,825 tonnes (1,796 long tons; 2,012 short tons)
5‰	1,860 tonnes (1,830 long tons; 2,050 short tons)	1,817 tonnes (1,788 long tons; 2,003 short tons)	1,760 tonnes (1,730 long tons; 1,940 short tons)	1,697 tonnes (1,670 long tons; 1,871 short tons)	1,550 tonnes (1,530 long tons; 1,710 short tons)	1,370 tonnes (1,350 long tons; 1,510 short tons)	1,187 tonnes (1,168 long tons; 1,308 short tons)	910 tonnes (900 long tons; 1,000 short tons)
10‰	1,052 tonnes (1,035 long tons; 1,160 short tons)	1,035 tonnes (1,019 long tons; 1,141 short tons)	1,013 tonnes (997 long tons; 1,117 short tons)	990 tonnes (970 long tons; 1,090 short tons)	930 tonnes (920 long tons; 1,030 short tons)	833 tonnes (820 long tons; 918 short tons)	730 tonnes (720 long tons; 800 short tons)	570 tonnes (560 long tons; 630 short tons)
16‰	657 tonnes (647 long tons; 724 short tons)	650 tonnes (640 long tons; 720 short tons)	640 tonnes (630 long tons; 710 short tons)	628 tonnes (618 long tons; 692 short tons)	600 tonnes (590 long tons; 660 short tons)	538 tonnes (530 long tons; 593 short tons)	471 tonnes (464 long tons; 519 short tons)	369 tonnes (363 long tons; 407 short tons)
20‰	511 tonnes (503 long tons; 563 short tons)	506 tonnes (498 long tons; 558 short tons)	500 tonnes (490 long tons; 550 short tons)	491 tonnes (483 long tons; 541 short tons)	472 tonnes (465 long tons; 520 short tons)	423 tonnes (416 long tons; 466 short tons)	369 tonnes (363 long tons; 407 short tons)	287 tonnes (282 long tons; 316 short tons)
25‰	389 tonnes (383 long tons; 429 short tons)	385 tonnes (379 long tons; 424 short tons)	381 tonnes (375 long tons; 420 short tons)	375 tonnes (369 long tons; 413 short tons)	362 tonnes (356 long tons; 399 short tons)	323 tonnes (318 long tons; 356 short tons)	280 tonnes (280 long tons; 310 short tons)	215 tonnes (212 long tons; 237 short tons)

The boiler of the MÁV Class 601 engine

the engine

MÁV Class 601 engine in 1914

References

1. Wolfgang Lübsen: Die Orientbahn und ihre Lokomotiven. in: Lok-Magazin 57, Dezember 1972, S. 448–452
2. http://vasutgepeszet.hu/wp-content/uploads/2014/12/201404_03-06_vegl.pdf
3. (Béla Czére, Ákos Vaszkó): Nagyvasúti Vontatójármüvek Magyarországon, Közlekedési Můzeum, Közlekedési Dokumentációs Vállalat, Budapest, 1985, ISBN 9635521618