Excellent link, orulz, and thanks for the answers. I could be busy for hours looking through those engineering docs.
As for electrifying the freight/metrolink line between LA and Palmdale... I'm not sure that makes financial sense. Electrifying a line costs several millions of dollars ($4-12 million) per mile, and if such an investment would only be useful for a few years (until California HSR comes online), I don't think it would be economical. Perhaps Metrolink would contribute and run electric equipment on the line, but I doubt it.
But running a through service anyway would be a great improvement to leaving people desert, or making them transfer to Metrolink at Palmdale. What if Xpress West were to use the Acela trainset (or the Chinese equivalent), but instead of two electric locomotives, use the
JetTrain on one end?
(The JetTrain was Bombardier's attempt to make a diesel version of the Acela so that it Amtrak could use the trainsets on more than just the Northeast Corridor)
Acela was designed for only one loco anyway (the other end was supposed to be a cab-car, but the FRA nixed that). So with one loco operating at a time, the train would be able to operate on both electrified and electrified track - sort of like NJT's
Atlantic City Express Service, but with high speed equipment the whole way.