PROFILPELAJAR.COM

Specifications
Specifications
Configuration:;
• UIC	Bo′Bo′+Bo′Bo′
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Wheel diameter	1,370 mm (4 ft 6 in)
Wheelbase	3,300 mm (10 ft 10 in)
Length	32,600 mm (106 ft 11 in)
Width	3,100 mm (10 ft 2 in)
Height	4,700 mm (15 ft 5 in)
Loco weight	176 t (388,000 lb)
Electric system/s	3,000 V DC
Current pickup(s)	Pantographs
RPM:
• Maximum RPM	745 rpm
Traction motors:
• Rating 1 hour	1520 A
Gear ratio	1:3.86
Loco brake	hand, air, regenerative brake
Couplers	AAR knuckle

Type and origin
Type and origin
Power type	Electric
Builder	Kim Chong-t'ae Works; North Korea
Build date	1981-1987

Red Flag 6
Red Flag 6
	The first prototype of the Red Flag 6 class at its rollout in 1981.
Power type
Type and origin
Power type	Electric
Builder	Kim Chong-t'ae Works; North Korea
Build date	1981-1987
Configuration:;
Specifications
Configuration:;
• UIC	Bo′Bo′+Bo′Bo′
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Wheel diameter	1,370 mm (4 ft 6 in)
Wheelbase	3,300 mm (10 ft 10 in)
Length	32,600 mm (106 ft 11 in)
Width	3,100 mm (10 ft 2 in)
Height	4,700 mm (15 ft 5 in)
Loco weight	176 t (388,000 lb)
Electric system/s	3,000 V DC
Current pickup(s)	Pantographs
RPM:
• Maximum RPM	745 rpm
Traction motors:
• Rating 1 hour	1520 A
Gear ratio	1:3.86
Loco brake	hand, air, regenerative brake
Couplers	AAR knuckle
Maximum speed
Performance figures
Maximum speed	120 km/h (75 mph) ; one hour: 49 km/h
Power output:;
• 1 hour	4,240 kW (5,690 hp)
Tractive effort:;
• 1 hour	306 kN (69,000 lbf)
Operators
Career
Operators	Korean State Railway
Class	붉은기6 Pulg'ŭn'gi-6
Number in class	≥37
Numbers	6001-6037+

The Red Flag 6-class (Korean: 붉은기6 Pulg'ŭn'gi-6) is a 4,240 kW (5,690 hp)^[2] two-section, permanently coupled electric locomotive built by the Kim Chong-t'ae Electric Locomotive Works and used by the Korean State Railway for heavy freight trains on mountainous lines.^[3]

Description

As the electrification of the Korean State Railway's network continued into the 1980s, the Red Flag 1 and Red Flag 2 class locomotives were the dominant type in service under the wires. However, with the electrification of steep mountain lines, it was realised that a more powerful locomotive was needed. Therefore, the Kim Chong-tae Electric Locomotive Works began design work on an articulated locomotive to operate freight trains on the difficult mountainous sections.^[3]

Using the Red Flag 2 class as a starting point, the Red Flag 6 (붉은기6, Pulg'ŭn'gi-6) class was developed.^[3] The result was a permanently coupled Bo'Bo'+Bo'Bo' articulated locomotive with eight capacitors,^[4] made up of two sections; these sections are single-cab versions of the Red Flag 2. The Red Flag 6 class is thus an articulated descendant of the Škoda Type 30E, which had formed the basis for the design of the Red Flag 1 and Red Flag 2 after North Korea bought a licence to build the type, including technology transfer, from Czechoslovakia.^[3] The first prototype was shown in 1981.^[5]

Numbered in the 6000 series, production of the new design began in 1986, and was put into service in 1987 to haul freight trains on the P'yŏngra Line.^[6] These four-bogie, eight-axle articulated units are 33 metres (108 ft 3 in) long, weigh 176 tonnes (388,000 lb) and produce 4,240 kilowatts (5,690 hp). They have a maximum speed of 100 kilometres per hour (62 mph) and can pull 3,200 tonnes (7,100,000 lb).^[7] Trial runs with passenger trains were undertaken, but the type is now mainly used on east-west freight trains on the P'yŏngra Line.^[3] The first prototype received a cream over red paint scheme, but production units are painted in the standard light blue over dark green livery.

Named locomotives

There are three known named Red Flag 6 locomotives:

Light (광명호, Kwangmyong-ho) - one locomotive, painted in cream over blue with a white stripe, named personally by Kim Jong Il, symbolising the bright future of students and youth,^[8]
Thousand-ri of liberation No.1 (광복의천리길1호, Kwangbokuicholligil1-ho) - one known locomotive,^[9]
Thousand-ri of liberation No.2 (광복의천리길2호, Kwangbokuicholligil2-ho) - one known locomotive, painted in light green over dark green.^[10]