|
|
| Re: Disabled New Jersey Transit train pulled into Penn Station (1304863) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: Disabled New Jersey Transit train pulled into Penn Station |
|
|
Posted by Bill West on Wed Jul 30 05:15:10 2014, in response to Re: Disabled New Jersey Transit train pulled into Penn Station, posted by Olog-hai on Wed Jul 30 03:30:59 2014. None of the starting difficulty is to do with loco hauled vs MU, nor with catenary, nor with what other cities do. New York is probably the only operation with substantial 2 % grades, both rivers too and at the traffic choke point. Roaring along the flat main at speed will be easy, it is getting halted on that grade that is always going to be the dicey propulsion capacity issue. Tuesday's whole rescue problem is to do with that exceptional grade.If a 10 car train is already at loco capacity then the dead loco is going to effectively add 1.25-1.5 more cars' weight making rescue difficult. Likewise if one MU out of 10 fails the rest are also going to have to find 11% more adhesion to restart. About the same problem in both cases. Our range of loco models won't make a difference either. AEM-7's, ALP-44's and ALP-46's are all about 100 tons on drivers. What traction they can get on a given day depends more on rail conditions than on the maker's opinion of what adhesion factor he can put into his tractive effort rating. Bill |
|
|
|