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National Railway Equipment Co. (NREC) recently obtained an order from Norfolk Southern Railway for two 2,100-horsepower N-ViroMotive™ locomotives.

The three-engine generator-set or “GenSet” locomotives are designed to reduce certain air emissions about 80 percent, improve tractive effort between 50 percent and 65 percent, and cut fuel usage between 35 percent and 50 percent compared with a conventional switcher.

“With generator-set locomotive engines powered by multiple engines, we are able to modulate the number of engines used at any given time, depending on the horsepower needed,” said NS Vice President of Mechanical Tim Heilig in a prepared statement. “This allows NS to burn less fuel, resulting in fewer emissions and greater efficiency.”

During a recent nine-day test, Providence & Worcester Railroad Co. found the N-ViroMotive switcher reduced fuel consumption about 64 percent compared with a GP40-2 locomotive.