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Cincinnati Streetcar ("Cincinnati Bell Connector")
Our system has double wire because the messenger wire bears more current than the contact wire can. This permits the TPSS' houses to be spaced further apart, and theoretically allows for larger LRV current draw (ie, faster acceleration, or longer trains).

As your quote points out, full dual-wire "stitched" catenary allows for higher speeds, too, because the contact wire can be kept more horizontally straight (parallel to the ground). At higher speeds, a single wire would sag into a catenary curve (math term - where the system gets its name) and the pantograph would bounce up and down.
For daily ion construction updates, photos and general urban rail news, follow me on twitter! @Canardiain
(09-05-2017, 03:07 PM)Canard Wrote: Tom - catenary is always singular, just FYI. Big Grin

I keep my yellow catenary in a cage  Tongue

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