Re: [NSW] Tangara problems

["Chris Downs" <cvdowns@ozemail.com.au>]

Watching Tangaras being driven at Olympic Park is instructive when it comes
to braking.  Drivers appear for more comfortable approaching a signal at
danger at a higher speed on 1 in 33 descending (especially compared with K
sets) or approaching the end of OP's platform in the knowledge that the
train will stop where they want.  This may be more of an indictment on the
braking power and consistency of other train types however.

I had a feeling that the service brakes on Tangaras were reduced in power in
the early 90s.  A full service application on a Tangara was something to
behold - serious braking power.  Was this so or do drivers not use the 6th
and 7th service braking notches now because they through standees off their
feet too readily?

Chris

either s the service braking power of Tangaras reduced
Jonathan Lau <jonlau@ozemail.com.au> wrote in message
39FCBD77.950D1C3D@ozemail.com.au">news:39FCBD77.950D1C3D@ozemail.com.au...
> Hubert Lam wrote:
>
> > So apart from driver and passenger's complaints about how seats are
> > hard and terminal doors swining open, what are some of the
> > technical/mechanical aspects that have proven to be extremely
> > troublesome? In my original post I referred to the "loud braking"
> > around year 1993-5 (not 93-5 as in some technical jargon), what was all
> > that about? I don't seem to hear that sort of noise now.
>
> I do recall that Tangara's had loud braking when stopping at stations and
> flats were developing at a fast rate.
>
> At first they blamed the drivers, saying driver error/misuse, but I read
> somewhere (years ago) that there was a design fault in the electronic
> brakes circuit board. Apparently the circuit boards tracks were wired to
> the wrong transistors (or something like that). Once they replaced the
> boards, the loud braking became history!
>
> I think it was around 1992-1993 that they discovered it.
>
> Regards,
>
> Jon Lau
>