> I believe the reason for leaving one pole on the pantograph Z3s is to enable
> the tram to be operated by the one remaining pole if the pantograph is
> damaged, otherwise it would necessary for the tram to be towed back to the
> depot.
Form observations in Swantson Street a few weeks back, the "remaining"
trolley poles on pantograph equipped Zs that still had them did not
appear to be particularly usable. The trolley retrievers were gone
and the pole was lashed to the roof. It would have taken quite a
while to get the tram mobile using the trolley pole, if indeed it was
possible at all.
> A secondary reason might be that it was cheaper to leave one pole there than
> to remove it. :-)
I suspect that this might be the real case.
Cheers,
Bill
Bill Bolton billbolton@acslink.net.au
Sydney, Australia