JNR Class D50 information

Specifications
Specifications
Configuration:;
• Whyte	2-8-2
• UIC	1′D1′ h2
Gauge	1,067 mm (3 ft 6 in)
Driver dia.	1,400 mm (55.12 in)
Length	17,248 mm (56 ft 7 in)
Height	3,955 mm (12 ft 11+3⁄4 in)
Axle load	14.70 tonnes (14.47 long tons; 16.20 short tons)
Loco weight	78.14 tonnes (76.91 long tons; 86.13 short tons)
Tender weight	49 tonnes (48 long tons; 54 short tons)
Firebox:
• Grate area	3.25 m2 (35.0 sq ft)
Boiler:;
• Tube plates	5,500 millimetres (18 ft 1⁄2 in)
• Small tubes	57 mm (2+1⁄4 in), 90 off
• Large tubes	140 mm (5+1⁄2 in), 28 off
Boiler pressure	13.0 kg/cm2 (1.27 MPa; 185 psi)
Heating surface:
• Firebox	13.5 m2 (145 sq ft)
• Tubes and flues	142.7 m2 (1,536 sq ft)
Superheater:;
• Heating area	64.4 m2 (693 sq ft)
Cylinders	Two, outside
Cylinder size	570 mm × 660 mm; (22+7⁄16 in × 26 in)

Type and origin
Type and origin
Power type	Steam
Designer	Tokichi Ogasawara and Hideo Shima
Builder	Kawasaki (204); Hitachi (80); Kisha Seizō (69); Nippon Sharyō (27);
Build date	1923–1931
Total produced	380

Japanese National Ry Class D50
China Railways 解放₁₆ class
Japanese National Ry Class D50; China Railways 解放16 class
	D50 319 in 1935
Power type
Type and origin
Power type	Steam
Designer	Tokichi Ogasawara and Hideo Shima
Builder	Kawasaki (204); Hitachi (80); Kisha Seizō (69); Nippon Sharyō (27);
Build date	1923–1931
Total produced	380
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-2
• UIC	1′D1′ h2
Gauge	1,067 mm (3 ft 6 in)
Driver dia.	1,400 mm (55.12 in)
Length	17,248 mm (56 ft 7 in)
Height	3,955 mm (12 ft 11+3⁄4 in)
Axle load	14.70 tonnes (14.47 long tons; 16.20 short tons)
Loco weight	78.14 tonnes (76.91 long tons; 86.13 short tons)
Tender weight	49 tonnes (48 long tons; 54 short tons)
Firebox:
• Grate area	3.25 m2 (35.0 sq ft)
Boiler:;
• Tube plates	5,500 millimetres (18 ft 1⁄2 in)
• Small tubes	57 mm (2+1⁄4 in), 90 off
• Large tubes	140 mm (5+1⁄2 in), 28 off
Boiler pressure	13.0 kg/cm2 (1.27 MPa; 185 psi)
Heating surface:
• Firebox	13.5 m2 (145 sq ft)
• Tubes and flues	142.7 m2 (1,536 sq ft)
Superheater:;
• Heating area	64.4 m2 (693 sq ft)
Cylinders	Two, outside
Cylinder size	570 mm × 660 mm; (22+7⁄16 in × 26 in)
Maximum speed
Performance figures
Maximum speed	70 km/h (43 mph)
Tractive effort	165.977 kN (37,313 lbf)
Operators
Career
Operators	Japanese Government Railways; Japanese National Railways; Jichang Jidun Railway; Manchukuo National Railway; Central China Railway; China Railway;
Class	JGR: 9900 → D50; JNR: D50; CCR: D50; CR: ㄇㄎ16 → 解放16
Numbers	D50 1-D50 380 (formerly 9900-9999,19900-19999,29900-29975)
Retired	1965
Preserved	D50 25, D50 140
Disposition	Two preserved, remainder scrapped

The Class D50 is a type of 2-8-2 steam locomotive built by the Japanese Government Railways (JGR), the Japanese National Railways (JNR) and various manufacturers from 1923 to 1931. The class name indicates that the locomotive has four sets of driving wheels (D) and belongs to one of the classes of tender locomotive allocated a number in the series 50 to 99 in the Japan Railways locomotive numbering and classification scheme of 1928. Hideo Shima designed the rest of the class until 1931.

The design of the D50 was based on the JNR Class 9600 which was introduced in 1916. A total of 380 Class D50 locomotives were built. Between 1951 and 1956 78 were rebuilt to JNR Class D60 2-8-4 Berkshire’s by the JNR. This class would later form the JNR Class D51.

JNR Class D50 information

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