Comment on Why don't railroads need expansion joints?
Peppycito@sh.itjust.works 1 week agoTLDW: skipped through until 25:47: the rail doesnt lengthen it just extends to the tops and sides.
That isn’t really true though. He never talked about ‘sun kink’ which is a thing. Apparently mostly due to poor ties and bedding.
There’s a neat discussion I found on some forum
So it appears the topic wasn’t able to be covered fully in 30 minutes, let alone 5.
YodaDaCoda@aussie.zone 1 week ago
Yeah in Melbourne several years back we had a heat wave that fucked up a bunch of the train tracks.
Isn’t the thunk-thunk as you’re travelling the wheels of the carriage passing over the expansion joints?.
flyingSock@feddit.org 1 week ago
Nowadays there are no thermal expansion joints, the rails are welded. Any thunk thunk left is at switches.
BangCrash@lemmy.world 6 days ago
You should probably watch the video. It’s informative and answers your question.