BostonUrbEx wrote:Torch the diesels.
MNRR M2s built in the 1970s have a 12-month MDBF equivalent to the highest MDBF the 4-year-old MBTA HSP46s have ever seen, and the rest of the MBTA fleet fails more than twice as often. The M2s YTD MDBF exceeds 63k miles. The new M8s have MDBFs of 215k miles for both 12-month and YTD average.
While comparing vehicles of similar age, you aren't comparing the whole propulsion system. With a diesel, the entire propulsion system is self-contained. The diesel generates its own electricity, so when something goes wrong with the engine's ability to go, it is blamed on the engine. However, with electric units the power has to be picked up from somewhere outside the unit. When the source of traction power fails in an electrified system, it is treated as an infrastructure failure and not an engine failure. While I agree this is the right way to present it, in order to compare the performance of a conventional railroad and an electrified railroad properly you have to include delays caused by the failure of the electric infrastructure.
MDBF plus power issues has to be considered when comparing electrics to diesels, because ultimately it's about what the passenger experiences in on-time performance. You're only telling half the story when speaking about the equipment. Yesterday, probably the busiest travel day of the year on the Northeast Corridor, was
ground to a halt because of plastic wrap caught up in the wires. None of these delays would be blamed on the locomotives and affect the MDBF. But none of them would have occurred if the wires didn't exist.
So there's more to it than just comparing MDBF.