2 ms·
I know nothing about train tracks past my BRIO days, but a bit about graphs. Can you explain how a track would not be bidirectional except for a permanent loop?
by travisjungroth 8y ago
I know nothing about train tracks past my BRIO days, but a bit about graphs. Can you explain how a track would not be bidirectional except for a permanent loop?
- desertrider12 8y agoBidirectional without backing up. To turn a train around, you need a closed loop at the end of the line or a triangle (wye).
- hakfoo 8y agoOne of the things that makes it more interesting in practice is that most electric model trains* use a "one rail is hot, one is return" electrical design-- so adding a wye or reversing loop to the design is asking for all sorts of electrical gimmicry to prevent it from shorting, while still maintaining usability. *classic Lionel and Marklin designs used a third conductor in the centre. Since the outer rails are wired together, reversing designs are trivial.