Diesel locomotive Therefore, diesel traction became economical for shunting before it became economical for hauling trains. The construction of diesel shunters began in 1920 in France, in 1925 in Denmark, in 1926 in the Netherlands, and in 1927 in Germany. After few years of testing, hundreds of units were produced within a decade. Diesel-powered or "oil-engined" railcars, generally diesel–mechanical, were developed by various European manufacturers in the 1930s, e.g. by William Beardmore and Company for the Canadian National Railways (the Beardmore Tornado engine was subsequently used in the R101 airship). Some of those series for regional traffic were begun with gasoline motors
Diesel Locomotive Factory, Marhowra in JV company subject to a maximum of . The estimated cost of 1000 locomotives will be around . General Electric will maintain the locomotives for 13 years, after which the Indian Railways will take over maintenance. There will be two types of diesel electric locos – 700 WDG 4G locos of 4,500 horsepower (HP) and 300 WDG 6 locos of 6,000 HP. Diesel Locomotive Factory, Marhowra The Diesel Locomotive Factory, Marhaura is a joint venture of GE Global Sourcing India Pvt. Limited of the US with Indian Railways for the production of 1000 high-power freight locomotives over a period