4 ms·
Space in the deep tube tunnels is really tight[0] (making it tricky to fit on-train air con radiators) and there's insufficient air circulation in the to clear
by pmyteh 4y ago
Space in the deep tube tunnels is really tight[0] (making it tricky to fit on-train air con radiators) and there's insufficient air circulation in the to clear the extra heat emissions in any case. They're working on both, but (unlike the shallower cut-and-cover lines and the NY Subway, both of which have saner tunnel sizes) it's decidedly non-trivial.
[0]: https://commons.m.wikimedia.org/wiki/File:Why_London_Underground_is_nicknamed_The_Tube.jpg https://commons.m.wikimedia.org/wiki/File:Why_London_Undergr...
- ClumsyPilot 4y agobut many trains without lack if space, like DLR, are also without AC
- pmyteh 4y agoYeah, that's true. Expect that will change with the next set of new trains, as with the newish S Stock on the subsurface lines. Not all mainline trains have AC either, though I think it's been nearly universal on new trains from the 90s onwards.