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This project interprets a plan that had great appeal to me from the Model Railroader December 1996 issue:  the HO scale Chippewa Central RR.  The track plan concept is a loop at the lower level with a reverse loop; a long route climbing to an elevated town;  with a passing siding on the grade to support two-train operation.   You can see the original MR illustration in the attachments below.

I added a few additional features not present in the original, to better accommodate O-gauge planning ideas:  additional spurs within each "balloon" loop;  interchange with a connecting railroad using the passing siding;  and a more complex and intriguing "Minnesota Junction"  that allows for more operating variety on the lower loop track:  a loop; a figure-8; and reverse loops in both directions.   I also elected to reveal the large outer curve on the left, originally hidden in a tunnel:  I prefer to be able to see more of the trains as they run, and there is already one tunnel toward the center of the layout (and long hidden tracks can be a pain to build and maintain).   I included Lionel's new 30" Extended Truss Bridge right of center.

The minimum diameter is O-48, accommodating O-42 equipment and smaller.   The turnouts are all O-60.

The plan from the magazine uses line drawings for the track, simplifying the ties and roadbed.   This results in a more open and scenic illustration, that conceals the small width between parallel tracks.   My illustration shows the ties and width of the Fastrack roadbed, to more accurately show the distance between parallel tracks and the space for elevation changes between the lower and upper levels.   So that one can have a better sense for building the terrain between tracks.

 

M716-01-Chippewa-Central-V1d

Of course your comments, suggestions and ideas are most welcome, I am happy to update to include improvements.  -Ken

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  • M716-01-Chippewa-Central-V1d
Last edited by Ken-Oscale
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I have been pondering access for this layout and others of this general form/shape.   The back side is difficult to reach, even with an "operating well" or indent like this layout has to improve reach and access, and even with access along the sides.  One solution is to build a rolling table on castors.   

Here is another idea:  the layout is supported by two sturdy bookcases constructed from 1x12s.   Then appliance rollers (which can support up to 1200 pounds) roll on top of the bookcases, to allow the entire layout to roll out about two feet, so a person can crawl or roll beneath the layout to get to the back when rolled-out (about two feet of roll, giving a space of about 2' at the back).   The layout rolls-out like a big drawer.   For strength and rigidity while also light, the framework can be constructed from a lattice-work of metal studs (longest stud is 12').   The layout surface itself rests on top of the latticework constructed of lightweight 2" foam sheets.

Seems like it would work:  what do you think?

whites-richelieu-hardware-casters-f27652-64_100025-gauge-track-clarkdietrich-drywall-steel-studs-framing-360081135-64_100020gauge-clarkdietrich-drywall-steel-studs-framing-120159-64_1000Front-viewTop-view

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  • 25-gauge-track-clarkdietrich-drywall-steel-studs-framing-360081135-64_1000
  • 20gauge-clarkdietrich-drywall-steel-studs-framing-120159-64_1000
  • Front-view
  • Top-view
Last edited by Ken-Oscale

I thought about extending the connecting RR at the top of the plan, around for an oval of O-72, and going across Lionel's Lift-Out Extended Truss Bridges (with a staging track or passing track).   So here is an unfinished look:  6'6" x 17':

So this will support 4 trains, with three running trading places with one on the siding over the truss bridge at the front.   The middle semi-circle of track on the right is on a fill, rising from about 3" to 6" at the bridge over Granite Falls.

M716-01-Chippewa-Central-V1f

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Last edited by Ken-Oscale

Mike, this zoom-in of the plan with grade and elevation labels may be helpful.   I left the grade displayed on each track section.

For this experiment, I raised the elevated section to 8" by continuing the grade across the bridge over Granite Falls up to the turnout marked as 8".   So the entire Clara City loop is level at 8".   Raising the elevation to 8" did not increase the grades elsewhere, so this seems doable.   I double-checked, and it is common prototype practice to continue grades across bridges and trestles.

M716-01-Chippewa-Central-V1f-cropped

Because the grade changes over the turnout at the very top-right, I left the two turnouts level at 3" in height, and the grades either climb or drop from those turnouts.   The top-right turnout is 13 1/8' long, and if including the 1-3/8 fitters, results in a level across that turnout of about 14.5".

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  • M716-01-Chippewa-Central-V1f-cropped
Last edited by Ken-Oscale

A bit more scenery detail, and one more spur serving an oil storage tank (Lionel) and an operating oil derrick (Lionel) in the upper-right corner.  This changed the slope of the far right outside O-72 curve to 3% (which is the maximum layout grade).

M716-01-Chippewa-Central-V1g

When kicking-back to watch trains run, I would have two trains on the large O-72 outside route (about 42'), following each other at the same speed, and a third train running the return-loops from Granite Falls up to Clara City and then back.   That would be pretty nice and relaxing!

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  • M716-01-Chippewa-Central-V1g
Last edited by Ken-Oscale

The Chippewa Central plan needs these turnouts for estimating overall costs:

  • 6-16826, 0 Lionel FasTrack, Left turnout 14 1/4". (O72) Command Control                1
  • 6-16827, 0 Lionel FasTrack, Right turnout 14 1/4". (O72) Command Control          1
  • 6-16828, 0 Lionel FasTrack, Left turnout 13 1/8". (O60) Command Control                7
  • 6-16829, 0 Lionel FasTrack, Right turnout 13 1/8". (O60) Command Control          8
  • The two Lionel Extended Truss Bridges are also a cost item ($300 MSRP each).

 

Naturally, it could be built in phases to spread out the cost and effort:

  1. Outside loop & turnouts, with one bridge
  2. Inside loop and Granite Falls
  3. Clara City elevated loop and grade up
  4. Passing track with 2nd Extended Truss Bridge

 

Even though the minimum curvature is O-48, I like that the turnouts are one width wider at O-60.

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