https://www.independent.co.uk/news/uk/h ... 75491.htmlMetals from rail and break friction are highly reactive and will damage delicate lining of the lung, like welding fumes do.
RC
https://www.independent.co.uk/news/uk/h ... 75491.htmlMetals from rail and break friction are highly reactive and will damage delicate lining of the lung, like welding fumes do.
What about theReformedCharacter wrote:Courtesy of The Independent, about potentially dangerous substances detected on the Underground:
https://www.independent.co.uk/news/uk/h ... 75491.htmlMetals from rail and break friction are highly reactive and will damage delicate lining of the lung, like welding fumes do.
!!!*** NOISE ***!!!
Not sure that beats the standard 1980s Northern Line excuse(?): "Trains delayed due to smouldering on the tracks"bungeejumper wrote:First Great Western used to have a nice line in rail break fiction. Horses on the line, usually. In leafy Ealing Broadway.
Spooky coincidence! And I had my own experience of "just knowing". A week before the fire, I'd been changing trains at Kings Cross, and I was about three levels down in the lower levels of the station, where the trains had unaccountably stopped running. Probably just a routine rush-hour hitch, nothing important, but after I'd been waiting twenty minutes I got an attack of claustrophobia - not something I normally suffer from.XFool wrote:On evening, in Summer 1987, I just 'knew'... https://en.wikipedia.org/wiki/King%27s_Cross_fire
Nothing "spooky" or psychic about it AFAIAC. At that time 'it' was in the air and all around, on the London underground.bungeejumper wrote:Spooky coincidence! And I had my own experience of "just knowing". A week before the fire, I'd been changing trains at Kings Cross, and I was about three levels down in the lower levels of the station, where the trains had unaccountably stopped running. Probably just a routine rush-hour hitch, nothing important, but after I'd been waiting twenty minutes I got an attack of claustrophobia - not something I normally suffer from.
It didn't help that there was a low-volume alarm siren going on somewhere, and nobody had switched it off, and it was slowly doing my head in, down in the bowels of the earth. Either way, I just had to get out of that place. I remember running up the staircases in a bit of a panicky sweaty state, and out into the street, where the fresh air smelt wonderful. I walked the next couple of stops to my destination.
Seven days later.....Y'know, I can almost believe in that psychic stuff sometimes....
Do electric underground trains have physical brake blocks/callipers or do they use regenerative braking?ReformedCharacter wrote:Courtesy of The Independent, about potentially dangerous substances detected on the Underground:
https://www.independent.co.uk/news/uk/h ... 75491.htmlMetals from rail and break friction are highly reactive and will damage delicate lining of the lung, like welding fumes do.
RC
Correct. Much of the tube was built with upward slopes into stations and declines away from them, to make use of gravity for speed reduction and acceleration.AleisterCrowley wrote:At least some of them* have regenerative braking. I suspect it's a mixture
*S7 and S8 for example
Disk brakes have generally replaced the old wheel clasp brakes on modern trains. They will certainly have these for emergency or heavy braking, in addition to any regenerative system they might have.Nimrod103 wrote:Do electric underground trains have physical brake blocks/callipers or do they use regenerative braking?