Re: [MELB TRAM] Buzzing Noise (Xmas Spirits!)

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

njpc@ozemail.com.au_NOSPAM wrote:

> Since it's that time of year, ie the Xmas party season:
>
> Some trams have a high-pitched buzzing noise that varies in pitch and
> volume as the tram accelerates and decelerates.  It seems to come from
> one of the overhead compartments and (I guess) is related to engine load
> or something similar.

It is the chopper motor controls on a Z class tram.  Find another class of tram
if you don't like it.   The 4D has the same propulsion system.



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