ČD Class 749

Specifications
Specifications
Configuration:;
• UIC	Bo´Bo´
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Length:;
• Over beams	16.5 metres (54 ft)
Height	4,356 millimetres (171.5 in)
Loco weight	75 tonnes (74 long tons; 83 short tons)
Fuel type	Diesel
Prime mover	ČKD K 6 S 310 DR
Train heating	Electric

Type and origin
Type and origin
Power type	Diesel-electric
Builder	ČKD
Rebuilder	ČD
Rebuild date	1992 to 1996
Number rebuilt	60

ČD Class 749
ČD Class 749
Power type
Type and origin
Power type	Diesel-electric
Builder	ČKD
Rebuilder	ČD
Rebuild date	1992 to 1996
Number rebuilt	60
Configuration:;
Specifications
Configuration:;
• UIC	Bo´Bo´
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Length:;
• Over beams	16.5 metres (54 ft)
Height	4,356 millimetres (171.5 in)
Loco weight	75 tonnes (74 long tons; 83 short tons)
Fuel type	Diesel
Prime mover	ČKD K 6 S 310 DR
Train heating	Electric
Maximum speed
Performance figures
Maximum speed	100 kilometres per hour (62 mph)
Power output	1,103 kilowatts (1,479 hp)
Tractive effort	180 kilonewtons (40,000 lbf)
Operators
Career
Operators	České dráhy, ČD Cargo, various others
Nicknames	Zamračená (Frowned) or Bardotka

The ČD 749 class is a diesel electric locomotive, created through refurbishment of classes 751 and 752 (formally T 478.2 under ČSD).

History

Following the move away from steam haulage on Czechoslovakia railways, it was decided that heating of passenger cars would move from steam heat, where steam from a boiler is piped through the train, to electric train heat. To convert the locomotives to the 749 class, the steam boiler was removed, and replaced with an alternator to provide electric train supply for heating. This process also took place with the locomotives of the ČD Class 753, which were converted to the 750 class.^[1]

The prototype for the conversion took place in 1992, with locomotive 751 039 being converted, with a second locomotive being converted in 1993. Following these two, 60 locomotives were converted, with the process being carried out until 1996. The final locomotive was additionally modified with a new electrical control system.^[1] The locomotives chosen to be converted were selected from all production series, therefore the new numbers do not form a continuous series.

Especially after 2005 the locomotives were increasingly used in freight transport, mainly to replace the aging unrebuilt 751 and 753 classes, and due to increasing electrification rendering the diesel locomotives obsolete. In 2007, several locomotives were transferred to ČD Cargo, following the separation from České dráhy.

Current operations

Today the remaining freight locomotives are based around České Budějovice, where they are used when freight trains are diverted away from the wires. At České dráhy several locomotives are still operational at Prague's Vršovice depot, working weekend services to Čerčany.^[2]

Technical Information

Class 749 is a dual cab, four axle locomotive. The prime mover is a ČKD K 6 S 310 DR, a four stroke, six cylinder diesel engine, fitted with a PDH 50 V turbocharger.^[1]^[3]

All four axles are fitted with DC traction motors, manufactured by ČKD.^[3]

References

^ ^a ^b ^c "Řada 749 ČD". prototypy.cz (in Czech). 9 December 2008. Retrieved 29 September 2019.
^ "Pravidelné vidění lokomotiv – 749". Spolek Přátel Zamračených (in Czech). Archived from the original on 29 September 2019. Retrieved 29 September 2019.
^ ^a ^b "751, 749, ex 752 / T 478.1". Atlas Lokomotiv (in Czech). Archived from the original on 29 September 2019.

[prototypy-1] "Řada 749 ČD". prototypy.cz (in Czech). 9 December 2008. Retrieved 29 September 2019.

[Passinger_workings-2] "Pravidelné vidění lokomotiv – 749". Spolek Přátel Zamračených (in Czech). Archived from the original on 29 September 2019. Retrieved 29 September 2019.

[atlas-3] "751, 749, ex 752 / T 478.1". Atlas Lokomotiv (in Czech). Archived from the original on 29 September 2019.

[1]

[2]

[3]

v t e Standard gauge locomotives of České dráhy
1500 V DC electric locomotives	ČD Class 100 ČD Class 113
3000 V DC electric locomotives	ČD Class 110 ČD Class 111 ČD Class 112 ČD Class 114 ČD Class 121 ČD Class 122 ČD Class 123 ČD Class 124.6 ČD Class 130 ČD Class 131 ČD Class 140 ČD Class 141 \|ČD Class 150 ČD Class 151 ČD Class 162 ČD Class 163 ČD Class 169 ČD Class 180 ČD Class 181 ČD Class 182 ČD Class 183
25 kV 50 Hz AC electric locomotives	ČD Class 209 ČD Class 210 ČD Class 218 ČD Class 230 ČD Class 240 ČD Class 242 ČD Class 263 ČD Class 280
Multi-system electric locomotives	ČD Class 340 ČD Class 362 ČD Class 363 ČD Class 371 ČD Class 372 ČD Class 380 ČD Class 383 ČD Class 388
Diesel–mechanical locomotives	ČD Class 700 ČD Class 701 ČD Class 702 ČD Class 703
Diesel–hydraulic locomotives	ČD Class 710 ČD Class 715 ČD Class 725 ČD Class 726
Diesel–electric locomotives	ČD Class 704 ČD Class 708 ČD Class 714 ČD Class 720 ČD Class 721 ČD Class 730 ČD Class 731 ČD Class 735 ČD Class 740 ČD Class 741 ČD Class 742 ČD Class 743 ČD Class 749 ČD Class 750 ČD Class 751 ČD Class 752 ČD Class 753 ČD Class 754 ČD Class 755 ČD Class 759 ČD Class 770 ČD Class 771 ČD Class 776 ČD Class 781 ČD Class 794 ČD Class 799
See also List of České dráhy locomotive classes