Layout Design Elements
The Reload section is the OPLC's Camp 11. It is the 'end of track', the northernmost point of the WWSL's 1st Division. Coal Grove is the section to the immediate south.
Reload has eight layout design elements (from backdrop to fascia):
- A simple backdrop - a
clear blue sky suggesting a sunny day.
- A close tree line.
- A yard lead to the Coal Grove yard.
- A close tree line.
- A two-track logging reload spur.
- A terminating main line.
- An interchange track.
- A wye track with an engine service spur on the inside.
Reload is a two-section set. The first section (17a) is a standard 2-foot by 8-foot section. The second section (17b) is a 2-foot by 4-foot section. Section 17b is connected in parallel to module 17a to deepen the section for the wye track and engine service spur.
See the WWSL section construction reference page for the construction technique.
ROW Design Considerations
Logging railroads using steam locomotives for transporting logs from the cutting sites to the sawmill have two options for train handling. The railroad can either: 1) push logging cars from the main line to the loading site, or 2) turn the locomotive at the loading site. The OPLC's standard procedure is to turn the locomotive at the loading site. Normally, the logging railroad used a wye track. Wye's require a great deal of space, and finding sufficient acreage in a
mountainous forest in the Olympic Peninsula is just as difficult for the WWSL.
I really wanted to show a logging company wye track at the end of the line.
This wye has three specific design issues:
- The north end wye leg length is only necessary to hold a steam locomotive and a water car,
- The south leg needs to join the scale track (as opposed to the main line) so that the service track can be inside the wye.
- The west wye leg intrudes into the dispatcher's desk space (but more importantly, the utility room equipment space).
A design alternative to a true wye track at Reload is replacing the west leg of the wye with a turntable. I could not fine anyone doing it in the modeling press. Leaping into the abyss i am using an Atlas 65-foot turntable and literally pushing it along the west leg center line until the north and south legs intersects with two of the turntable's 30 degree radius tracks.
The WWSL minimum engineering standards for a 2-8-0 steam locomotives using the right-of-way is 26-inch radius curves and # 6 turnouts. The railroad engineer surveyed the site to locate a triangle shaped wye places the North - South wye length 72 inches long (2*(26+10)), and the west end wye length 36 inches into the aisle. Once the west leg's center line is established, the turntable's location can be fiddled.
The logging reload spurs are easy to place. The critical factor here is the two spur tracks footprint must allow for log cars and log trucks under the electric log crane structure. I suspect that the footprint is going to look like a two-lane concrete road specification rather than a two-track yard.
The Coal Grove North Yard lead track is a continuation of its location on Coal Grove.
Laying out the Structures
There are nine structures that are going to be located on this
section: the locomotive servicing structures, I am not going to go into great detail about laying out the structures, as they do not affect the location of the trackage. See the
10.0.3 Structure Layout Technique for the specific details.
Essentially you're going to follow this process:
- Lay out the Electric Powered Log Crane
- Lay out the Water column
- Lay out the Oil column.
- Lay out the Sand column
I created structural footprints for all the structures.
See the Structures Reference Page for the specific details about building the structures.
Laying out the Right of Way
I am not going to go into great detail about putting down the roadbed lines. See the Right of Way Reference Page for the details if you haven't had the fun to do it before.
Essentially you're going to follow this process:- Lay out the main line at the 7 inch line.
- Lay out the secondary (scale lead) track at the 4 inch line.
- Lay out the north wye leg allowing for the length of the OPLC steam locomotive, a water car, and the north leg turnout.
- Lay out the west to north wye curve.
- Lay out the west to south wye curve.
- Lay out the south wye leg allowing for the length of the south leg turnout.
- Lay out the two log transfer tracks using a preferred 6 log car capacity on each track.
- Lay out the Coal Grove north yard lead at the 15 inch line.
- Lay out the WWSL interchange track.
Roadway.
- The OPLC is designated Class C main line. See See 4.2.11.3 Modeling Technique for Low Profile Roadway for details.
- The remaining OPLC trackage is designated an Industrial Lead or Spur Track. See 4.2.11.7 Modeling Technique for Industrial Lead or Spur Track for details.
- The WWSL scale track is designated a storage track. See 4.2.11.8 Modeling Technique for Storage Track for details.
Laying out the turnouts
The OPLC uses #6 turnouts on all its trackage. I have to ensure that the normal route leg of the north wye turnout (26-inch radius) aligns with the main track layout line at 7 inches, and the normal route leg of the south wye turnout (26-inch radius) aligns with the scale track layout line at 4 inches.
I laid out the OPLC locomotive/water car length templates at the end of main line location and added sufficient clearance spacing to prevent collision with the backdrop. I used Ribbon Rail and Fast Track track laying tools to locate and build in the easement and curve radius'.
Laying out the turntable
The Atlas Turntable has a 9 inch turntable track and its built in stall track is xx degrees. I laid out the straight line equivalent on both ends of the turntable wall to aid in the location of the turntable. There was alot of fiddling - reliable turntable operations are best when the approach track is straight to the turntable track.
Cantenary
The O.K. Coal north yard lead will require catenary pole placement. The OPLC trackage is not wired. See 7.1 Cantenary Systems Overview for details.
Layout Drainage. See 4.1.8 Ditches, Drains and Culverts
Drainage
Culverts
Track Details.
- The OPLC will use 4 bolt rail joiners on all trackage.
- The OPLC use low mount switch stands.
- There is a lift type derail on the service track.
4.2.12.5 Rail Rests
4.2.12.6 Tie Stack Detail
4.2.12.7 Equipment House Detail
In the next blog (Section 17 - Reload - Part 2) I will discuss the Landform Design Considerations.
No comments:
Post a Comment