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Electro-Motive Division SD28 and SD35
United States | 1964 | 401 produced
Three Baltimore & Ohio SD35s in 1969 near Keyser, West Virginia
Three Baltimore & Ohio SD35s in 1969 near Keyser, West Virginia
Roger Puta

As with the first generation, the GP28 and GP35 were once again offered as six-axle variants with the same engine power. The SD35 with 2,500 hp was offered from June 1964 and 360 were built for customers in the USA. 100 of these went to the Southern Railway, followed by 80 for the Norfolk & Western. From July 1965 the SD28 with 1,800 hp was also offered. Since a six-axle locomotive of this power class was apparently not very attractive on the market, only two were sold to the Columbus and Greenville Railway and four to the Reserve Mining Company.

Just one month after the launch of the SD35, the Seaboard Air Line ordered 20 passenger locos to replace their old E-series locos and still be able to be used as freight locos if required. They were based on the SD35 with a steam generator and gear ratio for 95 mph and were designated the SDP35. A total of 15 more were ordered, ten of them by the Union Pacific. When Amtrak took over passenger service, the SDP35s remained with their operators and were used in freight service and shunting. The four pieces of the Louisville & Nashville were even reconfigured before delivery and delivered without a steam generator. A passenger variant of the SD28 also appeared, six of which had been ordered by the South Korean state railway. These were significantly lighter and shorter than the other six-axle locomotives.

VariantSD28SDP28SD35SDP35
General
Built196519661964-19661964-1965
ManufacturerElectro-Motive Division
Axle configC-C 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length60 ft 8 in56 ft 2 in60 ft 8 in
Fixed wheelbase13 ft 7 in
Service weight390,000 lbs260,000 lbs434,000 lbs360,000 lbs
Adhesive weight390,000 lbs260,000 lbs434,000 lbs360,000 lbs
Axle load65,000 lbs43,335 lbs72,335 lbs60,000 lbs
Power
Power sourcediesel-electric
Top speed65 mph95 mph65 mph95 mph
Starting effort97,000 lbf64,000 lbf97,000 lbf90,000 lbf
EngineEMD 16-567D1EMD 16-567D3A
Engine typeV16 diesel
Fuel1,200 us gal (diesel)3,000 us gal (diesel)1,700 us gal (diesel)3,200 us gal (diesel)
Engine output1,800 hp (1,342 kW)2,500 hp (1,864 kW)
Power Plant
Boiler
Calculated Values
diesel locomotive
freight
passenger
last changed: 03/2022
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