JNR Class DD93

The JNR Class DD93 was a diesel-hydraulic locomotive operated by the Japanese National Railways and later the Nagoya Rinkai Railway from 1960 to June 1972.
==History==
The DD93 was a prototype diesel-hydraulic locomotive used by the JNR, with a single locomotive prototyped while the company developed its own locomotives for domestic sales as well as potentially for export. A total of ten locomotives were prototyped; these were Hitachi's DF90, DF91 and DF93, Kawasaki's DF40, Kisha Seizō's DF41, Nippon Sharyo's DD42 and DD93, Shin-Mitsubishi's DD40 and DD91 and Toshiba's DD41.
One locomotive was built in 1960 by Nippon Sharyo; when built, it featured a number plate reading "DD 1000 HV" and was displayed at the Asian Railway Leader's Meeting that year. The locomotive was purchased by the Japanese National Railways in 1960, numbered DD93 1 and deployed at Nagoya Rolling Stock Center where it was mostly used for switching duties between Nahoya Station and the now-abandoned Sasajima Station. DD93 1 was returned to Nippon Sharyo in March 1965.
In August 1965, DD93 1 was purchased by the Nagoya Rinkai Railway and put into service pulling freight trains. It was reclassified the Class ND551 and renumbered ND551 1; the locomotive entered service with the opening of the company, alongside the ND552 locomotives. When transferred the locomotive's prime mover was also replaced. ND551 1 operated until June 1972 when it was withdrawn and scrapped.
==Design==
The DD93 featured a steeplecab-like design, giving it an appearance similar to that of a switching locomotive.
==Specifications==
The DD93 was fitted with a L12V 18/21 prime mover and a LT306r hydraulic transmission; the prime mover was of a MAN design but built by Mitsubishi Heavy Industries under license, while the hydraulic transmission is of a Voith design built by Fuji Electric. The prime mover produced 1,100 PS (809 kW). When bought by the Nagoya Rinkai Railway the prime mover was replaced with a DML61S prime mover, the same prime mover as used on the DD51.
==Gallery==
DD 1000 HV 1960.jpg|DD93 1 c.1960 with old "DD 1000 HV" number boards
Category:JR Group trains
Category:B-B locomotives
Category:Diesel locomotives
Category:Diesel-hydraulic locomotives
Category:Nippon Sharyo locomotives
Category:Japanese locomotives
Category:Scrapped diesel locomotives
Category:Built in 1960