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| Re: Addenda - Re: Pantograph for Trackless Trolley vs. Light Rail or MU (486713) | |||
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Re: Addenda - Re: Pantograph for Trackless Trolley vs. Light Rail or MU |
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Posted by WillD on Thu Sep 6 14:40:51 2007, in response to Addenda - Re: Pantograph for Trackless Trolley vs. Light Rail or MU, posted by Robert King on Thu Sep 6 14:10:06 2007. This is why the TTC usually - with only one exception that I know of - kept the trolley coach overhead entirely separate from the streetcar wire. The pair of trolley coach wires would be located at the outside of the road, between the curb and the streetcar wire with the streetcar wires in the centre of the street above the tracks as usual.Thank you, that's exactly what I was getting at in another post here. I suppose with the cost of copper these days that'd be slightly more expensive than just two. Just out of curiousity would it be possible to change the wire spacing to accomodate a pantograph? Since the trolleybus's poles can presumably move independently you probably could go to a 6 to 10 foot wire spacing between the positive wire over the tracks and the ground wire. That way the pantograph could contact the positive wire without shorting to the ground wire. The big problem I see with this arrangement is that it'd severely limit the bus's maneuverability. If the bus is normally able to go 12 feet on either side of the centerline of the wire run then if the wires are 8 feet apart there'd only be 4 feet on either side before it'd likely dewire. Are trolleybus operators averse to operating their buses with the poles askew? |
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