Re: [VIC] Wooden cars at high speed (was: [VIC] Parallel run)

["Michael McDonald" <michael.and.colleen.mcdonald@xtra.co.nz>]

The best example of flexing I've seen was the Gulflander in 1982(?).  There
were rub marks on the rear wall where the rear seat frames were in contact
with the wall.  As far as I can remember the movement was at least 100mm.  I
thought it a miracle that the railcar was still running (it was withdrawn
within a year or two).  It was flexing BECAUSE the wheels were staying in
contact with the rail.

Cheers
Micahel

malcolm's <kmalcolm@tpg.com.au> wrote in message
01bfaa9b$f914b580$451e3acb@keithm.commslab.gov.au">news:01bfaa9b$f914b580$451e3acb@keithm.commslab.gov.au...
> Please tell me you are kidding. That is almost as good as bogies being
> designed with 6 wheels to ensure at least 4 wheels remain on the rails on
> rough track.
> --
> Dave Malcolm
>
> David Bromage <dbromage@fang.omni.com.au> wrote in article
> <N6dL4.599$TI6.629982@news0.optus.net.au>...
> > Stuart Thyer (s.thyer@anatomy.unimelb.edu.au) won a Nobel Prize for
> literature by writing:
> > > I still believe the cars would have flexed as new, not as much as now,
> but
> > > there has to be give in virtually any structure of its size, even
> motorbikes
> > > frames flex, even a skyscraper flexes.
> >
> > Part of the flexing is caused by torsional (twisting) forces from the
> auto
> > couplers. The original frame was only designed to take tension forces
> > between the screw couplers.
> > Cheers
> > David
> >