DeRoNi-class locomotive

Chosen Government Railway DeRoNi class (デロニ) Korean State Railway Chŏngidu class (전기두)
A Chŏngidu class locomotive of the Korean State Railway
Type and origin Power type Electric Builder Hitachi Build date 1943–1944
Specifications Configuration: ​  • UIC 1C-C1 Gauge 1,435 mm (4 ft 8+1⁄2 in) Wheel diameter 1,370 mm (54 in) Trailing dia. 860 mm (34 in) Wheelbase: ​  • Axle spacing (Asymmetrical) 1-2: 2,050 mm (6 ft 9 in) 2-3: 1,880 mm (6 ft 2 in) 3-4: 2,600 mm (8 ft 6 in) Pivot centres 9,780 mm (32 ft 1 in) Length: ​  • Over body 16,800 mm (55 ft 1 in) Width 3,100 mm (10 ft 2 in) Height: ​  • Pantograph 4,750 mm (15 ft 7 in)  • Body height 4,050 mm (13 ft 3 in) Adhesive weight 108 t (238,000 lb) Loco weight 135 t (298,000 lb) Electric system/s 3,000 V DC Current pickup(s) Pantographs Generator 1x MG3 Traction motors 6x MT2 ​  • Continuous 350 kW (470 hp) Gear ratio 19:78=1:4.11 Loco brake EL14AR Regenerative Train brakes Elnar air brake, hand brake Compressor 2x MC2 1,700 L (450 US gal)/min Couplers AAR knuckle
Performance figures Maximum speed 75 km/h (47 mph) Power output 2.1 MW (2,800 hp) Tractive effort 171.79 kN (38,620 lbf)
Career Operators Chosen Government Railway Korean State Railway Class CGR: デロニ DeRoNi KSR: 전기두 Chŏngidu Number in class 4 Numbers CGR: デロニ1 - デロニ4 KSR: 전기두1 - 전기두4

The DeRoNi-class (Japanese: デロニ) was a group of four boxcab-style electric locomotives with regenerative braking and the capability for multiple-unit control manufactured by Hitachi in 1943-44,^[1] very similar to the Toshiba-built DeRoI and the Mitsubishi-built DeRoI-class locomotives.^[2]

They were built for the Chosen Government Railway (Sentetsu), who designated them DeRoNi (デロニ) class, and after the partition of Korea were inherited by the North Korean State Railway, where they were known as the Chŏngidu (Korean: 전기두, "Electric 2") class.^[3]