I decided to build a modern, powerful locomotive to my Lego City. I don't want to build a lego monster with extra long, and extra weight, that cannot turn on curves.
My goal was to create a traditional lego city locomotive, with the most powerful solution, that can handle with 1 IR receiver.
This picture was the idea, but this is not a real train yet. Maybe later Siemens will build same trains.
My train has this PF components:
4 PF train engine under the train (1 pieces of 9v motor has rebuilded with PF motor, so with 9V rail don't need batteries)
3 PF cable
1 battery box
1 IR receiver 2.0
The IR receiver can control the 4 engine with maximum output, and can pull, or push ~30 train car easily.
Endless: the locomotive based on the set 7938 but needed lot of extra pieces.