On Jan 31, 9:40 am, "Boltar" wrote:
On Jan 30, 8:28 pm, "Andy" wrote:

"Boltar" wrote in message

oups.com...

I've noticed the victoria line seems to be much warmer than the other
lines these days (or maybe it always has been but I've not noticed).
Is this because the trains are more frequent , or they use up more
energy on ATO , or the tunnel ventilation isn't so good , or is there
some other reason?

B2003

The CCO (Coasting Control Override) trial might have some effect.

Whats this then?

B2003

I'm not sure if the CCO would be an issue - it's only enabled on three
stretches:

Seven Sisters - Finsbury Park (southbound only)
Oxford Circus - Green Park (southbound only)
Green Park - Victoria (southbound only)

For anyone interested this features keeps the motor going rather than
coasting once the train's reached its maximum speed. I think the heat
issue is more likely to be caused by people not opening the end of car
windows on a stock that, otherwise, has quite limited air circulation.
When the end-car windows are open at both ends I think the trains are
pretty reasonable temperature-wise

Tom

On Feb 1, 1:38 pm, "Tom Page" wrote:
For anyone interested this features keeps the motor going rather than
coasting once the train's reached its maximum speed. I think the heat

Whats the advantage of that? Wouldn't it just waste electricity and
cause excess heat as mentioned?

B2003

On 1 Feb, 14:03, "Boltar" wrote:
On Feb 1, 1:38 pm, "Tom Page" wrote:

For anyone interested this features keeps the motor going rather than
coasting once the train's reached its maximum speed. I think the heat

Whats the advantage of that? Wouldn't it just waste electricity and
cause excess heat as mentioned?

B2003

It's not exactly rocket science that if one coasts one loses speed due
to friction, so keeping the motor going allows faster journey speeds.
Of course, the benefit of this has to be weighed up against energy use
and maintenance requirements.

Tom

On Feb 1, 2:59 pm, "Tom Page" wrote:
On 1 Feb, 14:03, "Boltar" wrote:

On Feb 1, 1:38 pm, "Tom Page" wrote:

For anyone interested this features keeps the motor going rather than
coasting once the train's reached its maximum speed. I think the heat

Whats the advantage of that? Wouldn't it just waste electricity and
cause excess heat as mentioned?

B2003

It's not exactly rocket science that if one coasts one loses speed due
to friction, so keeping the motor going allows faster journey speeds.

Because of their weight and lack of rolling resistence trains tend to
lose speed far less quickly than other sorts of wheeled vehicles so it
would be interesting to see just how much speed a vic train would
loose when coasting. Of course if the track has a gradient that will
make a big difference. Surely though the logical thing would be to
have the motors cut back in when the speed had dropped by a few mph
rather than having them on constantly?

B2003