UPY 1449 started life in 1975 as a MP15AC with the Southern Pacific. It was last rebuilt into an MP15N (utilizing the Nexsys control system) and prior to being moved out of Denver could to be fou... (more)

The UP is upgrading their MP15 fleet and designating them 'N' models. The major element of the upgrade includes replacing the AR6 traction alternator with the AR10 and a ZTR Nexsys III microproce... (more)