In article , Richard J. wrote:
Niklas Karlsson wrote:
How come the Jubilee Line is so noisy? It seems to be considerably
noisier (from inside the trains, though also from the platform when a
train approaches/leaves) than the other lines.

Does it actually run faster, or is something else causing the noise?

If you mean the whining noise as a train accelerates or decelerates, that's
because the trains on the Jubilee (1996 stock) use Gate Turn-Off Thyristors
to control the supply of electric current to the traction motors, the system
being very similar to Connex's Class 465/466 Networker trains which make a
similar noise. (Info from Richard Griffin's web site at
http://www.squarewheels.org.uk/rly/s...tubeStock.html )

Thanks! There seems to be more noise while travelling through the
tunnels as well, though, at least compared to the lines I usually travel
on (Picc, Northern, sometimes Central and District)...

Niklas
--
"IMO, the primary historical significance of Unix is that it marks the time in
computer history where CPUs became so cheap that it was possible to build an
operating system without adult supervision."
-- Russ Holsclaw in a.f.c