trainroomgary posted:My first question: At the Union Pacific Steam Club
Why does that Union Pacific Big Boy 4014, have a diesel pusher behind the Big Boy engine? Thanks
This is a review of all the answers: Running on a class one railroad requires more braking to be onboard than the steamer provides and adds dynamic braking as well. Plus electrical power for the passenger cars.
Not true, as NONE of the UP diesel electric locomotives have HEP capability. The UP passenger car fleet have their own HEP power cars which supply all the electrical needs of the passenger cars. Plus, the Steam Crew has their own "power car", i.e. the Boiler/Dormitory car "Howard Fogg".
Also clearing the main line in case of a breakdown. The Union Pacific has liability insurance and the insurance company want back up locomotives for safety and to get the passengers to a safe area if the Big Boy breaks down. These are just some of the reasons and there are more technical issues to be resolved like PTC. (Positive Train Control)
Concerning the PTC comment, it would make no difference whether the trailing diesel unit/units are equipped with PTC or not, as the LEAD LOCOMOTIVE must have PTC, i.e. either FEF-3 #844 or #4014, in order for it to be in the lead/controlling position.
Source: “Union Pacific Steam Club ” • Excerpts from 25 answers
Gary: Rail-fan
