Technical
The SD50 is powered by V16 16-645F3 series diesel engine driving either an EMD AR11A-D14 or an EMD AR16A-D18 traction alternator. The power generated by the traction alternator drove 6 EMD D87 traction motors rated at 1170 amps each.
Depending on customer options, the SD50 was available with a multitude of traction-motor gearing ratio and wheel size options, the most common of which being the 70:17 ratio with 40-inch (1,000 mm) wheels, this allowed for a top speed of 70 mph (110 km/h). Other gearing options for the SD50 with 40-inch (1,016 mm) wheels include 69:18 for 76 mph (122 km/h), 67:19 for 82 mph (132 km/h) and 66:20 for 88 mph (142 km/h). 42-inch (1,067 mm) wheels were also available. Customers of the SD50 also had the option of either HT-C trucks (identified with a hydraulic shock on the side of the middle axle of each truck) or the earlier Flexicoil trucks, which only Conrail opted for. Some investigators implicated the HT-C truck in derailments in Amtrak's SDP40F locomotive fleet and Conrail chose to order SD40-2s and their first order of SD50s with the earlier Flexicoil C truck. The controversy surrounding the HT-C truck was eventually disproved, and Conrail's second order of SD50s as well as their SD60 variants were all HT-C equipped.
The SD50 could be equipped with fuel tanks sizes from 3,200 US gallons (12,100 l; 2,660 imp gal) up to 4,400 US gallons (16,700 l; 3,660 imp gal), had a lube oil capacity of 396 US gallons (1,500 l; 330 imp gal) and a cooling water capacity of 276 US gallons (1,040 l; 230 imp gal).
Read more about this topic: EMD SD50
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