Neil Williams wrote:
On Sep 8, 5:55*pm, "Paul Scott"
wrote:

I'd also propose that NO trains have been 'sidelined' at any time. Some are
modified, and some aren't, that's all.

Still in service, then? The Standard seemed to be reporting as if
they'd all been withdrawn for mods with all trains cancelled.

Is the lurching any worse than, say, a Pendolino through Berkhamsted
(just before Berko there is a particularly bad lurch and bang where
the tilt mechanism reaches its full extent at the same time as a bad
bit of track makes the suspension bottom and the cant increases).
Actually, I've been tempted to report it in case there's actually
something wrong - does anyone else know what I mean and have a view?


I think I know exactly what you mean. There was a particular spot on
my commute home from London to Haywards Heath/Brighton where there was
a terrific 'lurch', just south of Redhill station where the "Quarry
Line" (Redhill-avoiding main line) rejoined the line that runs through
Redhill station. It was at its worst in seats at the trailing ends of
Class 319 coaches, or in the motor coach of a 4-BIG, CIG or VEP when
the suspension would bottom out with a bang. I did report it, several
times, as did many other passengers (apparently) and eventually some
work was done to the track that reduced the 'lurch' to something more
tolerable.

What you have described as 'lurching' that is pretty common in
Pendolinos. I've had about 15-16 trips in them this year, all north
of Milton Keynes, and they all suffer that problem at several points
between Rugby and Stafford - to the point where I doubt they were ever
credibly going to run in service at 140 mph as I have said on here
before.

The 'hunting' of the Class 395s is quite different. Rather than a
one-off 'lurch' at a particular location, 'hunting' is a resonant
oscillation of a dynamic system that can continue for several minutes.
It is loud, uncomfortable and unpleasant. It can be quite alarming to
passengers because it is quite clearly uncontrolled, even though it
probably poses a low risk to safety.

This continuous 'hunting' is therefore quite different from the
one-off 'lurching'.