Why the special air intake duct? Does the railroad have a lot of tunnels?
The special air intake duct reminds me of the old "tunnel motor" SD45's and SD40-2's made for the Southern Pacific and the Rio Grande by EMD in the 70's. They were designed so cool, fresh air from the floor of a tunnel entered the engine from the walkway instead of hot air and exhaust trapped at the roof of a tunnel entering the engine through its roof.
I like how the newest demo unit incorporates the green and yellow of the Brazilian flag in the paint scheme.
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