A pair of DF50s on a farewell tour in 1983
1,067 mm ( 3 ft 6 in)
800 mm (2 ft 7 in)
16,400 mm (53 ft 10 in)
2,932 mm (9 ft 7.4 in)
3,987 mm (13 ft 1.0 in)
Traction motors MT48 x 6
90 km/h (55 mph)
1,060 hp (DF50-0), 1,200 hp (DF50-500)
Class DF50 ( is a class of DF50形) Bo-Bo-Bo wheel arrangement diesel-electric locomotives operated by Japanese National Railways (JNR) in Japan from 1957 until 1983. 
Variants [ edit ]
First batch of 65 locomotives built between 1957 and 1962 with
Sulzer 8-cylinder 8LDA25A 1,060 hp diesel engines.  Production was shared between Kisha,  Mitsubishi, and Nippon Sharyo. 
DF50 1 on a passenger service in 1979
DF50 65 on a freight working in 1982
DF50-500 [ edit ]
Later batch of 73 locomotives built between 1958 and 1963 with
MAN V6-cylinder V22/30 1,200 hp diesel engines.  Production was shared between  Hitachi, Kawasaki, and Toshiba. 
DF50 573 on a passenger service in Shikoku in 1979
Operations [ edit ]
A pair of Class DF50s on a limestone freight working in 1983
Class DF50 locomotives were intended for use on both passenger and freight services, and included a
steam generator for train heating. They operated on the following lines, including use hauling "  Blue Train" sleeping car services. 
In later years, operations were restricted to Kyushu and Shikoku, with the remaining locomotives withdrawn in 1983, except for DF50 1, which later passed into
JR Shikoku ownership. 
The locomotives were initially painted in all-over maroon with stainless steel bands, but were subsequently repainted into the standard JNR diesel locomotive livery of vermillion and grey.
Preserved examples [ edit ]
Three Class DF50 locomotives were preserved.
Preserved DF50 1 at The Railway History Park in Saijo in May 2015
Preserved DF50 18 at the Tsuyama Railroad Educational Museum in May 2016
See also [ edit ]
References [ edit ]
Wikimedia Commons has media related to
. JNR DF50
^ a b c d JR全車輛ハンドブック1995 [ JR Rolling Stock Handbook 1995] (in Japanese). Japan: Neko Publishing. 1995. p. 71.
^ a b c d e f Inoue, Kōichi (1999). 国鉄機関車辞典 [ JNR Locomotive Encyclopedia] (in Japanese). Japan: Sankaido. p. 182-183. ISBN 4-381-10338-6.
^ a b Sasada, Masahiro (September 2012). 国鉄&JR保存車大全 [ JNR & JR Preserved Rolling Stock Complete Guide] (in Japanese). Tokyo, Japan: Ikaros Publications Ltd. p. 34, 127. ISBN 978-4863206175.
^ . DF50 18が津山に向けて陸送される [DF50 18 moved to Tsuyama] RM News (in Japanese). Japan: Neko Publishing Co., Ltd. 11 March 2015 . Retrieved . 11 March 2015