by Fan Railer
bostontrainguy wrote: ↑Thu Dec 24, 2020 9:13 am Interesting that sometimes you seeing it running with the front pantograph up and other times with the rear. You never see it like the present Acela with both up.For the purpose of the testing, they are keeping the same pantograph raised, regardless of operating end changes. This is so that they can validate the dynamic model of the trainset for all potential operating conditions. In practice, the rear pantograph is supposed to be raised in service.