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Jul 9, 2018 · As you can see (arrow) the railhead is at just under 3/4" (5.4 scale feet) of thickness above the bridge's botttom, including cork roadbed underneath flex track. Added to the NMRA 3" vertical clearance, that makes 3.75 inches of grade separation necessary for this kind of overpass.
Jan 5, 2016 · 7886 posts · Joined 2008. #4 · Jan 5, 2016. As the wall is straight, you should be able to get away with tracks on 7"+ centers. The widest model locomotive is about 6.52" wide (K-37) - unless you plan to run 7/8n2 rolling stock! I share riderdan's concern about running 120' on top of a wall. Anything that happens (twig, heat buckling,) will ...
Most pre-1960 cars and locos will pass under a bridge that is 3 inches above the track in HO. They will also run through most ready-made tunnel portals quite well whether single or double (two tracks side by side) portals. However, modern double-stack trains will hit that bridge and 'maybe' make it through a tunnel portal, but probably not.
Oct 29, 2019 · Where I have wanted to get tracks vertically superimposed at minimum clearance, I used 2mm aluminium sheet for the bridge span, but this is only for a bridge deck of a few inches width in a non scenic area of the layout. Needs must when the devil drives, and all that.
Mar 14, 2016 · 4256 posts · Joined 2016. #17 · Mar 24, 2016. G scale is unlike all the others because of the different sizes. If you are modeling standard gauge then 1:32 is in proportion to the track size. 1:20 and 1:22 are roughly in proportion to some narrow gauges. 1:24 is half inch equals 1 foot and 1:29 is exactly 3 times HO.
Jun 18, 2020 · Photo 51: Tracks after painting. The next step was to paint the track. I took a “size 00” brush and a tube of acrylic burnt umber paint, and applied the paint directly to both sides of the rail to give it that rusty, dirty look, as shown in Photo 51. The 2.5” Atlas sectional track in the photo will be the fixed track on the tower base.
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Oct 4, 2018 · One thing that complicates the bridge a bit is that it will hold a wye so it has to be narrow (12" - 15") at the hinged end but it will be about 36" wide at the other end. Another limitation is that it must lift up as opposed to swinging to the side because of the geometry of the hinged section. So, please show me how you have built your bridges.
