Re: [NSW] Two questions

[David Johnson <trainman@ozemail.com.au>]

Chris Downs wrote:

> Two questions for those in the know:
>
> 1)    My train to Penrith passed 4 x 81 on 42 hoppers worth of up coalie at
> 1050 at Werrington yesterday.  A yellow vehicle was positioned between the
> 1st and 2nd 81s.  Was it likely to have been a dynamometer car or.......?
> From a very brief view it looked like a guard's van.
>

It was NDMF18E - The Freightcorp Brake Test car.  One (almost) photo of it at

> http://www.railpage.org.au/pix/diesel/9018-9028-9016-9008_105-wagon-train_Bylong_5-9-95.jpg
>
> 2)    What is the meaning of the buzzer like noise on DJMs (toward the front
> of the cars) for 10 seconds or so during fullish service brake applications?
> The train is still usually travelling at around 50-60km/h.  I'm not
> referring to the chopper humming but a much louder noise.  [May apply
> equally to DKMs and may not apply to all DJMs]

I'm not sure exactly where it comes from, but my guess is the electronics inside
one of the cupboards there that controls the GTO Thyristors.

--
David Johnson
trainman@ozemail.com.au
http://www.ozemail.com.au/~trainman/
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