blue streak 1
The PAs always had a nice low profile. A question ; Do the PAs have a lower center of gravity ? If so they or a new similar dynamic loco would be ideal for tilting trains such as Talgos ?
The Canadian LRC train, while not quite as extreme as the Talgo, has/had a lower roof profile than conventional lightweight streamlined trains. This feature included the locomotives, which were Canadian-licensed ALCos.
Think of it, the RS-series road switchers had a lower long hood than most other such Diesels. I suppose if you take an RS-3, replace the cab and short hood with a low profile nose, and as they say in Canada, voila, you have an LRC "power car."
The LRC coaches, they tell me, are still in service but the LRC power cars/locomotives/whatever you call them are not -- did I tell you they were ALCos? They have been replaced by Genesis Diesels, which are noticably taller than the LRC coaches, giving a consist some of the Cascades Talgo "look."
As for tilting trains, I read that the locomotive having a low center of gravity is not the concern. Rather, if the locomotive has too high a weight per axle, rounding curves at a speed that would take full benefit of the active tilt of trains like the LRC, the resulting forces would spread the rails -- not good.
The LRC power cars were supposed to be light in weight (the "L" in LRC standing for legere as in light), but I guess their weight crept upwards (when they went from 12-cyl 3000 HP to 16-cyl 4000 HP?), so they did not turn out to be the best locomotive for a tilting train. The Talgos are passive tilt (pendulum suspension) with limited compensation for the "cant deficiency", but their more modest speed overage on curves is about what you can tolerate with a conventional locomotive (i.e., a Genesis as in Cascades service).
The LRC coaches, on the other hand, are said to have their tilt disabled. C'est la vie, according to another popular Canadian expression.
As to the low profile of the PA, I had been told by Jim Hediger, recently retired as an editor of Model Railroader, that whereas an EMD E unit rode like a Pullman car, the PAs were quite rough riding. I guess the E-7/8/9 has a smoother riding truck.
If GM "killed the electric car", what am I doing standing next to an EV-1, a half a block from the WSOR tracks?