AU Lifetime Supporter
Gathering Team Member
- Aug 24, 2003
It was much easier to build a third rail + diesel dual mode than a 12.5kV catenary AC + diesel dual mode. The locomotives for use on the Empire Corridor are single mission units hence third rail was fine. It was especially easier when the engine did not have to perform too well in the third rail mode and just barely work to transit the tunnel part. The OHE dual modes are much more capable units specially in the electric mode.Very true - I wasn't sure if it ran far enough to meet the city requirements, not knowing exactly where the boundary is. It does make you wonder why we have P32's though.
Notwithstanding all that, the choice of equipment would be different if you were going to spring for catenary dual mode anyway to handle south of Washington DC and Springgfield Line and the like off electrification extensions of runs from the electrified spine. If you were going to get those anyway, it would not make sense to also get third rail single mission units. That was my point.
The third rail and the catenary extends to about the same point outside the Empire Connection tunnels.
As an aside, remember that until the ALP45DPs came about most did not believe that a diesel + 25kV catenary dual mode was technically possible. I remember spending hours explaining to highly opinionated people who knew little of Physics or Electrical Engineering but were sure that it could not be done, as to what exact piece of technology had just then become available which made it feasible. When the P32s came in that technology was not quite there yet, at least not in a form and weight factor that made them usable in a locomotive. Anyhow, these geniuses thought I had grown two heads or something and never believed a word that I said, and were totally floored when the first ALP45DP arrived and actually worked. Then they spent the next few years arguing fervently about the impossibility of dual mode HV AC catenary EDMUs, until they were proved wrong again. It was at least entertaining to watch.