Indian locomotive class WDM-1

The WDM-1 was the first class of wide gauge (W), diesel-powered (D), mixed-load (M) locomotive, meant for hauling both freight and passenger trains. These are also the first mainline diesel engines imported after Independence. They were even the fastest diesel locomotives till the advent of WDM-2 and WDM-4. They used to haul ore/freight trains on SER. In the end, they were relegated to shunting/piloting duties or hauling sugarcane freight trains. All locomotives of this class have been withdrawn from service.^[2][3] One unit, #17000, is preserved at National Rail Museum, Delhi.^[2]

WDM-1[1]
A WDM-1 preserved at NRM, New Delhi
Type and origin Power type Diesel Builder ALCo Model DL500C Build date 1957–1959 Total produced 100
Specifications Configuration: ​  • AAR C-C  • UIC Co-Co Gauge 1,676 mm (5 ft 6 in) Loco weight 111.2 t (109.4 long tons; 122.6 short tons) Fuel type Diesel fuel Engine type 12 cylinder, four-stroke diesel Aspiration Turbo-supercharged Cylinders 12 Transmission Electric
Performance figures Maximum speed Max: 104 km/h (65 mph) Rated: 100 km/h (62 mph) Power output Max: 1,950 hp (1,450 kW) Net: 1,800 hp (1,300 kW) Tractive effort 27,900 kgf (274 kN; 61,509 lbf)
Career Operators Indian Railways Numbers 17000-17099 Locale Eastern Railway, South-eastern Railway and South-Central Railway Withdrawn 2000 Preserved 1 (#17000) at NRM Disposition Withdrawn from service, one preserved, remainder scrapped

Trains hauled by WDM-1

• Howrah–Chennai Mail
• Kakinada Madras Circar Express
• Guntur Waltair Simhadri Express

See also

• Indian Railways
• List of diesel locomotives of India
• Indian locomotive class WDM-2