Re: Tilting-train technology

["Roderick Smith" <rodsmith@werple.net.au>]

Tilting trains allow higher speeds from passenger-comfort considerations;
they do not affect rail forces or safety.  There is a big margin between
speeds which are uncomfortable for passengers, and speeds which are likely
to lead to a train capsizing.

For well-laid track, any train should be able to run at 6 degrees of cant
deficiency (British standard); this equates to 1 m/s/s lateral
acceleration, which is the same figure as is the normal limit for passenger
comfort (for standees) for longitudinal acceleration.

-- 
Regards
Roderick Smith
Rail News Victoria Editor

Blair Alldis <archetype@trump.net.au> 
 I am seeking some technical information (quantitative if possible)
> regarding the tilt train (eg. Qld) specifically:
>    Amount of lateral movement of the cars,
>    Shift of centre of gravity,
>    Changes in forces on the rails, etc.
> I am also interested in finding out more about whether the resultant
> permissable increase in speed when cornering is possible primarily due to
> increased passenger comfort or safety considerations.