Diversion traffic from the Silverliner V fiasco.Since I live along the Keystone route, a couple other things that caught my eye: 130k ridership is 16% better than the same month in FY15 and an increase in ticket revenue of 12%. All while maintaining an on-time percentage of 95, which is one of the best of all the routes.
My response would be reliability, but that's just me.Why do you need more locomotives? The only reason to add more power is to accelerate faster, which really doesn't matter on long distance trains, considering the length of the schedule and infrequency of stops. The Auto Train uses two locomotives for 50+ cars, which proves that they have no issue with the weight of the train.
Seems like an expensive insurance policy. A lot of overhead and diesel costs. Better value for the money might be to figure out how to successfully perform preventative maintenance so that locomotives are in the shop before they fail en route. If Amtrak can't figure that out, any new locomotives are going to suffer from the exact same problems down the road.My response would be reliability, but that's just me.Why do you need more locomotives? The only reason to add more power is to accelerate faster, which really doesn't matter on long distance trains, considering the length of the schedule and infrequency of stops. The Auto Train uses two locomotives for 50+ cars, which proves that they have no issue with the weight of the train.
There's also the issue of HEP (head end power) capacity. Adding cars to the existing trains could cause acceleration and top segment speeds to drop. The host railroads might require more power, as BNSF does for the empire builder in the winter.Seems like an expensive insurance policy. A lot of overhead and diesel costs. Better value for the money might be to figure out how to successfully perform preventative maintenance so that locomotives are in the shop before they fail en route. If Amtrak can't figure that out, any new locomotives are going to suffer from the exact same problems down the road.My response would be reliability, but that's just me.Why do you need more locomotives? The only reason to add more power is to accelerate faster, which really doesn't matter on long distance trains, considering the length of the schedule and infrequency of stops. The Auto Train uses two locomotives for 50+ cars, which proves that they have no issue with the weight of the train.
Auto Train runs with what, 18 passenger cars? Nothing else comes close. Unless you're talking about almost doubling train length that won't be an issue. Acceleration is of little consequence on schedules with typically over an hour between stops, and top speed is irrelevant--it takes far less energy to keep the train in motion than it did to get there. And maybe if Amtrak's engines stopped crapping out the host railroads might be inclined to give a little longer leash.There's also the issue of HEP (head end power) capacity. Adding cars to the existing trains could cause acceleration and top segment speeds to drop. The host railroads might require more power, as BNSF does for the empire builder in the winter.
Reliability Centered Maintenance (RCM) seems to work well for the Acela trainsets, and if they can manage to keep those things running reliably, new diesels should be no problem at all.Seems like an expensive insurance policy. A lot of overhead and diesel costs. Better value for the money might be to figure out how to successfully perform preventative maintenance so that locomotives are in the shop before they fail en route. If Amtrak can't figure that out, any new locomotives are going to suffer from the exact same problems down the road.My response would be reliability, but that's just me.Why do you need more locomotives? The only reason to add more power is to accelerate faster, which really doesn't matter on long distance trains, considering the length of the schedule and infrequency of stops. The Auto Train uses two locomotives for 50+ cars, which proves that they have no issue with the weight of the train.
Keep in mind though that long-distance passenger trains very rarely will accelerate to track speed and stay there until the next stop; Rather, the engineer must slow for curves, slow orders, and a myriad of other conditions and then get back up to speed relatively quickly to maintain the schedule. Stops may be hours apart, but how often does the train actually slow down (or stop)?Acceleration is of little consequence on schedules with typically over an hour between stops, and top speed is irrelevant--it takes far less energy to keep the train in motion than it did to get there
Indeed RCM seems to work quite well. Which goes back to my point about the diesel shops--if the rest of the system doesn't figure out how to use it, then any new locomotives will suffer the same fate as the Genesis units, and if they do adopt it, then the current fleet should be able to handle the daily schedule again and new equipment can be used for expanding service, rather than being dragged around wasting money.Reliability Centered Maintenance (RCM) seems to work well for the Acela trainsets, and if they can manage to keep those things running reliably, new diesels should be no problem at all.
Number of locomotives required depends greatly on individual route and terrain. The Silver Star and Silver Meteor have run full consists (ten or eleven cars) with a single P42, but I doubt the California Zephyr could manage that with any sort of acceptable schedule. Acceleration and top speed absolutely are important in that while a single unit can move even Auto Train, you want to run things at passenger train speeds (79 mph), not slower than the most under powered drag freight on the railroad.
Those factors (I guess except for the slow orders) are already accounted for in the schedule. They're more than accounted for, in fact, seeing as in good conditions trains can arrive early if the padding in the schedule isn't needed. And the fact that Amtrak to a certain extent juggles train consists--adding cars in the summer--without correspondingly adjusting the schedule indicates to me that the effect of the added weight is a negligible factor in a schedule that already has what I can only guess is a fair amount of wiggle room.Keep in mind though that long-distance passenger trains very rarely will accelerate to track speed and stay there until the next stop; Rather, the engineer must slow for curves, slow orders, and a myriad of other conditions and then get back up to speed relatively quickly to maintain the schedule. Stops may be hours apart, but how often does the train actually slow down (or stop)?Acceleration is of little consequence on schedules with typically over an hour between stops, and top speed is irrelevant--it takes far less energy to keep the train in motion than it did to get there
Exactly - we speed up and slow down All. The. Time. between scheduled station stops. Temporary speed restrictions, permanent speed restrictions, work authorities, curves, bridges, local ordinances, weather, UEA, cross traffic, medical emergencies, meeting other trains, waiting for other trains, police holds, dispatcher forgot to line the route, etc.Keep in mind though that long-distance passenger trains very rarely will accelerate to track speed and stay there until the next stop; Rather, the engineer must slow for curves, slow orders, and a myriad of other conditions and then get back up to speed relatively quickly to maintain the schedule. Stops may be hours apart, but how often does the train actually slow down (or stop)?Acceleration is of little consequence on schedules with typically over an hour between stops, and top speed is irrelevant--it takes far less energy to keep the train in motion than it did to get there
The Boston section clearly only needs one locomotive, but the train becomes a behemoth west of Albany, and bluntly, based on current demand, it's going to get even longer.Most of the 110mph for the LSL is south of Albany where the New York section gets a single P32ACDM.
These day the LSL is regularly running with a single P42 Albany to Chicago.
If there are enough locomotives to go around. Where are those Chargers, anyway?I am sure it will get a second engine when one is needed.
Enter your email address to join: