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An interesting 'frog' thingy


UK, Midlands

I used the word 'frog' not in order to wind anyone up, but out genuinely don't know what to call this. USA railroad, Tampa, USA

I have seen moving nose turnouts on high speed lines in UK, but never something like this on a low speed line.

EDIT: I see- it's designed to lift the flange over the main rail and plonk it back down the other side- apparently this is smoother than a conventional crossing. Hmmm.

It's at 9:27, but the whole video (backing a 13 car train around what our US friends call a 'wye junction' and then back down 2 miles into Tampa station. It's an interesting video.

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Martin Wynne

West of the Severn UK
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Alan McMillan

I don't really see the point of it (no pun intended). They still need switch blades and the stock rail opposite the "crossing" needs to be shaped to create the ramp so there's just as much machining and bending to do as there would be in an ordinary turnout. What therefore is the advantage? I can't honestly see either how it could possibly be a smoother ride than a standard crossing. It looks to me like the solution to a problem that doesn't exist. The Japanese do, however, use something similar for sidings and service tracks but theirs are stub turnouts so at least they don't need to machine any blades.


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