Re: Z Class 1
Bill Bolton
Wednesday, January 23, 2002 7:41 PM
On Wed, 23 Jan 2002 09:14:14 -0500, Herman wrote:
After an accident in the early '60s in which a Victorian trammie was
shocked while trying to maneuver a pole after the rope broke (I think
on one of the provincial systems, but I'm not certain on that), all
Victorian trams were fitted with two trolley ropes, so that if one
broke, there was a backup.
Trolley retrievers on trams were very rare in Australia, so having
the two ropes connected *to the head of the pole* is unusual.
On cars without retrievers (i.e. most Victorian pole equipped trams),
the primary rope was connected to the head of the pole, while the
secondary rope was attached to a metal ring which was loose on the
pole and which normally sat down near the trolley base. This kept the
secondary rope out of the way in normal operation, but allowed it to
maneuvered up the pole from ground level if the primary rope broke....
which would do to allow the car to be operated back to a depot for
attention to the primary rope under safe conditions.
Cheers,
Bill
Bill Bolton
Sydney, Australia
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Why did that pole need two lines to hold it down?
After an accident in the early '60s in which a Victorian trammie was
shocked while trying to maneuver a pole after the rope broke (I think
on one of the provincial systems, but I'm not certain on that), all
Victorian trams were fitted with two trolley ropes, so that if one
broke, there was a backup.
Trolley retrievers on trams were very rare in Australia, so having
the two ropes connected *to the head of the pole* is unusual.
On cars without retrievers (i.e. most Victorian pole equipped trams),
the primary rope was connected to the head of the pole, while the
secondary rope was attached to a metal ring which was loose on the
pole and which normally sat down near the trolley base. This kept the
secondary rope out of the way in normal operation, but allowed it to
maneuvered up the pole from ground level if the primary rope broke....
which would do to allow the car to be operated back to a depot for
attention to the primary rope under safe conditions.
Cheers,
Bill
Bill Bolton
Sydney, Australia
------------------------ Yahoo! Groups Sponsor ---------------------~-->
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