Locomotives of Bangladesh
In the rail transport system of Bangladesh, diesel locomotives are used. Among diesel locos, there are diesel-electric and diesel-hydraulic locos. Besides diesel locos, steam locos were used in the past, but now they are no longer used. By gauge, there are narrow-gauge (762 mm), meter-gauge (1,000 mm) and broad-gauge (1,676 mm) locos in Bangladesh. Among them, as no narrow-gauge railroads are active, so the narrow-gauge locos are not used anymore. In 1961, there were 415 steam locos (both broad-gauge and meter-gauge) in the then East Pakistan, out of  which, 262 were more than 30 years old. Also there were 51 meter-gauge diesel locos, among which, 40 were class 2000 and 11 were class 3000 locos. As of 2020, total 476 meter-gauge and broad-gauge diesel locos (including the old 11 class 3000 locos) have been imported in Bangladesh. Most of them are diesel-electric, but 80 locos are diesel-hydraulic. Among the 476 locos, 349 are meter-gauge and 127 are broad-gauge. All diesel-hydraulic locos were produced by Ganz-MÁVAG of Hungary. Various companies produced the diesel-electric locos, notable among them are GMD , ALCO, MLW, Hyundai Rotem. and DLW, Progress Rail. History. Rail network started in the then East Bengal of Indian Subcontinent on 15 November 1862. During that time, steam locos were used to pull trains. They served the railway of Bangladesh for the next hundred years (approx.). Diesel locos first started operation in Bangladesh (the then East Pakistan) with the introduction of class 2000 EMD B12 diesel-electric locos in 1953. Till then, the demand and usage of diesel locos increased rapidly. Side by side, the usage of steam locos decreased, and in the 1980s, all steam locos were taken out  from service. A small number of them are preserved. Diesel multiple units. A few routes have DMU service. Depending on their transmission system, they are classified as DEMU (diesel-electric transmission) Chinese manufactured (CNR Tangshan) meter-gauge DEMU was introduced in Bangladesh from May 25, 2013. DEMU is the country's first-ever commuter train service starting its journey on the Chittagong–Fouzdarhat line. These DEMUs also operate on the Chittagong Circular Railway and on several Bangladesh Railway's service. 20 sets of DEMU were imported then. Each set contains 3 coaches which can carry 300 passengers at a time . The power of each set is 1800 hp and can go at a speed of 80 km/h maximum. These DEMUs didn't turn out to be successful for Bangladesh Railway. Steam locomotives. Preserved steam locomotives. A small number of steam locomotives are preserved in Bangladesh. The gauge locomotives are from the Rupsa-Bagerhat railway which was the only gauge line in East Pakistan when colonial India was partitioned in 1947. It was re-gauged to gauge in 1970.