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Re: Channel 7 "Learners Show" Tram Driving.
- Subject: Re: Channel 7 "Learners Show" Tram Driving.
- From: David Johnson <trainman@ozemail.com.au>
- Date: Thu, 01 Jul 1999 22:12:32 +1000
- Newsgroups: aus.rail
- References: <37720dbc.0@hoisp1.redland.net.au> <m_dd3.16470$PN5.42637@newsfeeds.bigpond.com> <3776ae07.0@newshost.pcug.org.au> <377c324a.589823451@news.tardis.net> <ccVd3.17351$PN5.45079@newsfeeds.bigpond.com> <377836E1.8F678164@omni.com.au> <7l9glh$pfa2@atbhp.corpmel.bhp.com.au> <37785113.ABE45E30@omni.com.au>
- Reply-To: trainman@ozemail.com.au
David Bromage wrote:
> > > The late Northern Tablelands Express was well known for rough riding when
> > > running to timetable. Comeng took a ride index meter on the train not
> > > long before it was taken over by the XPT. It peaked at 5.4 between Werris
> > > Creek and Tamworth!
> >
> > 5.4 whats (no, not watts) and what is it relative to, ie is 1 good?
>
> 1 is good, 4 is uncomfortable, and 5 is considered to be dangerous.
Ride index is derived from a very complex algorithm. It is related to speed and
requires horizontal and vertical accelerations measured above the bogie centres
at each end of the car. When testing the XAM sleepers, they were getting ride
indexes of 3.2 at 180 km/h compared with 1.6 in the older XBR car. Many
modifications have taken place since then, resulting in much better (read: poor)
riding qualities.
--
David Johnson
CityRail Guard
trainman@ozemail.com.au
http://www.ozemail.com.au/~trainman/