JNR Class D51

Specifications
Specifications
Configuration:;
• Whyte	2-8-2
Gauge	1,067 mm (3 ft 6 in); 1,435 mm (4 ft 8+1⁄2 in) (KNR Mika7)
Length	19,730 mm (64 ft 8+3⁄4 in)
Loco weight	76.8 t (75.6 long tons; 84.7 short tons)
Total weight	123.0 t (121.1 long tons; 135.6 short tons)
Fuel type	Coal
Valve gear	Walschaerts
Valve type	Piston valve
Loco brake	Air
Train brakes	Air

Type and origin
Type and origin
Power type	Steam
Designer	Hideo Shima
Builder	Kawasaki Heavy Industries Rolling Stock Company; Kisha Seizo; Hitachi; Nippon Sharyo; Mitsubishi Heavy Industries
Build date	1936-1951
Total produced	1115 (Japan); 37 (Taiwan); 10 (Philippines); 2 (Korea) 30 (Soviet Union)

JNR Class D51
Soviet Railways D51
Taiwan Railways DT650
Manila Railroad 300 class (1951)
KNR Mika7 (미카7)
JNR Class D51; Soviet Railways D51; Taiwan Railways DT650; Manila Railroad 300 class (1951); KNR Mika7 (미카7)
	JR East's D51 498 on the Jōetsu Line in December 2010
Power type
Type and origin
Power type	Steam
Designer	Hideo Shima
Builder	Kawasaki Heavy Industries Rolling Stock Company; Kisha Seizo; Hitachi; Nippon Sharyo; Mitsubishi Heavy Industries
Build date	1936-1951
Total produced	1115 (Japan); 37 (Taiwan); 10 (Philippines); 2 (Korea) 30 (Soviet Union)
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-2
Gauge	1,067 mm (3 ft 6 in); 1,435 mm (4 ft 8+1⁄2 in) (KNR Mika7)
Length	19,730 mm (64 ft 8+3⁄4 in)
Loco weight	76.8 t (75.6 long tons; 84.7 short tons)
Total weight	123.0 t (121.1 long tons; 135.6 short tons)
Fuel type	Coal
Valve gear	Walschaerts
Valve type	Piston valve
Loco brake	Air
Train brakes	Air
Maximum speed
Performance figures
Maximum speed	85 km/h (55 mph)
Tractive effort	184.3 kN (41,400 lbf)
Numbers
Career
Numbers	JNR : D51 1-D954, D51 1001-1161 (Japan) TRA : DT651-687 (Taiwan) Soviet Railways : D51-1-D51-30 (Soviet Union) KNR : 1701-1702 (Korea) Manila Railroad : 300-309 (Philippines)
Retired	1956 (Philippines); 1965 (Korea); 1975 (Japan); 1979 (Soviet Union); 1983 (Taiwan)
Disposition	174 preserved, five operational, 6 converted into JNR Class D61 (Japan); Two preserved (Russia); Four preserved (Taiwan)

The Class D51 (D51形) is a type of 2-8-2 steam locomotive operated by the Japanese Government Railways (JGR) and later by the Japanese National Railways (JNR). Designed by JGR's chief mechanical engineer Hideo Shima, they were built by Kawasaki Heavy Industries Rolling Stock Company, Kisha Seizo, Hitachi, Nippon Sharyo, Mitsubishi Heavy Industries and JGR's factories from 1936 to 1945.

Although surpassed in speed, power, and size by other locomotives, it is recognised as the most mass-manufactured locomotive in Japanese rail history. A total of 174 units are preserved in Japan, including five operational examples. An additional 13 are preserved in Russia and Taiwan, bringing the total number of preserved units to 187.