So your saying 75 locomotives cover all the long distance trains? Never did the math myself.
I actually did the math. It's very curious. If you put one locomotive on each train, 75 *should* cover all the so-called long-distance trains (even with a daily Cardinal and Sunset).
The question is how many of the trains need more than one locomotive. The Chargers have different specs from the Genesis engines, so this is not a question with an obvious answer at all.
Does anyone have a better idea of where two locomotives will be required? There are three separate sources of this requirement:
-- long trains combined with high HEP needs meaning that a second loco is needed to meet the acceleration profile
-- steep grades (such as going from Denver west on the California Zephyr) requiring a second loco to accelerate and maintain speed
-- host railroads demanding a second locomotive in case of locomotive failure en route
I really don't know the specific situation with regard to these factors on ANY of the lines. If someone knows more, I'd love the information. I particularly know nothing about host railroad demands.
In terms of technical requirements, I believe the following trains have run with one Genesis locomotive with no problems in the past:
-- Lake Shore Limited
-- Capitol Limited
-- Cardinal
-- Silver Star
-- Silver Meteor
-- Crescent
-- California Zephyr from Chicago to Denver
(Most of these routes are pretty flat, while the Cardinal and Capitol Limited pull short trains and the mountain tracks have low speed limits which don't tax the locomotives so much)
I believe the following trains still run with one locomotive routinely:
-- City of New Orleans
-- Texas Eagle
(These are both flat routes AND short trains)
Is it possible that all the trains could run with one Charger locomotive? I would expect a second one to be needed at least on the following bits:
-- California Zephyr up the Front Range from Denver to Salt Lake, and across the Sierras from Sacramento to Reno
-- Coast Starlight through the Cascades
-- Southwest Chief over Raton Pass
But I don't really know.
The Empire Builder crosses the Rockies with one locomotive for each section (Portland and Seattle), so I guess it probably would be OK with one locomotive for the whole flat part of the route if it has enough power for HEP and for accelerating to speed.