In the 1970s and 1980s, several railroads had a bit of a fad with B-units. Meaning units without a cab. The units still had a prime mover and traction motors, but could only be controlled when MU'd to other units. Such units are quite rare today, but it just so happened that an SD45-2B was coming through town at BNSF's Engine House today. SPTX 5703 has a bit of a storied history. It was actually originally delivered as a standard SD45-2 (with a cab). In fact, this was the unit that Santa Fe painted in red, white, and blue to celebrate the Bicentennial in 1976. However, in October 1987, Santa Fe converted three SD45-2s into B-units, removing their cabs. ATSF 5703 was one such unit. Note that the dynamic brakes were moved forward to the area where the cab had once been located to help improve cooling. The unit is now owned by a private individual named Noah McCann, and it is reportedly headed to Middletown, IA.
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