07-30-2010, 05:58 AM
Green_Elite_Cab Wrote:I think i saw a similar situation at sunnyside yard, towards the wash rack, but i can't get a good picture of the box catenary. The catenary was anchored on the second pole away from the turnout, but they first go out and are pulled aside at the bridge just before the turnout, putting them in alignment for the turnout. the catenary here is inclined, and like i said, the only problem is i can't find any pictures of the rest of the turnout.
Here is an example of how i think i can pull this off. THe blue wire will be the main wire, while the red one is the diverging. I'll add a triangular pull off, just like the ones in your photos, and that will pull the red wire to the side so that it is at the right angle to approach, and so it should all work out.
the only thing i'm not clear on is how the box catenary goes together (the deflectors as they call them in those PRR plans you linked to me). would they also be slanted like a parallellogram? or would the catenary straighten out?
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Hey Cab
I think your plan looks good except I think you might have to add another cat structure maybe a small two track bracket. I dont think you will be able to incline the inner tracks with just 3 structures . The messenger wire for the inner track would have to be practically over the outer track . actually I would alernate small and large catenary structures. A full structure at the start of the curve, a small 2 track bracket next, then a full structure and so on
Ive seen this done on the Chestnut Hill West and the Media/west chester line here in Philly both two track lines with sharp curves.
The same happens at Gap PA
Im not really sure about the deflectors I know the area your talking about in sunnyside yard .. I thought i had pictures
but I dont.
Steve Smith
1:1 railroad architect
1:87 railroad architect
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1:1 railroad architect
1:87 railroad architect
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