The story of Union Pacific's DDA40X, the 6900s | Sunday Morning Coffee & Trains

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** About this video: The largest, most powerful diesel locomotives ever built: Union Pacific DDA40X Centennials weighed 270 tons, were almost to 100 feet long, carried 8,000-gallons of fuel, and generated 6,600 horsepower – with speeds of up to 90 mph.

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