Are you in need of a tunnel portal or portals for your On30 layout? If so there are several options available -- either commercially available R-T-U (ready to use) or you can scratchbuild to meet your needs.
Commercially Available Tunnel Portals for On30 Layouts
Here are some commercially available On30 and O scale tunnel portals:- DebenLLC On30 Wooden Timber Tunnel Portal - Rustic (labstone) Scale Model
- Pre-Size Model Specialties On3/On30 Tunnel Portal
- Pre-Size Model Specialties O scale Tunnel Portals
- Scenic Express O Scale Tunnel Portals & Walls
- Hunterline O Scale and S Scale Tunnel Portals -- Read this Blog post on building this portal kit
- Monroe Models O Scale and S Scale Tunnel Portals and Walls
- Ultimate Scenery O scale and S Scale Tunnel Portals
We have included some S Scale tunnel portals in the links above as some On30 modelers have decided on the use of S Scale tunnel portals for On30 layouts. Also please note that most if not all of the R-T-U tunnel portals still require stain/paint/weathering, and some are kits.
Scratchbuilding On30 Tunnel Portals
If you prefer to scratchbuild tunnel portal(s) you might consider these references:- NMRA Recommended Practice 7.1 on Tangent Track Centers and Clearance Diagrams
- Thomas Farrell's Facebook post on building an On30 Timber Tunnel Portal using an On30 Clearance Gauge
- Pacific Coast Air Line Railway Timber Tunnel Portal for an On30 Railway based on an OR&W tunnel
- Railroad Line Forums On30 Wooden Tunnel Portals topic has several ideas, and a dimensional drawing
There are also numerous magazine articles providing reference and how-to information for various types of tunnel portals. A few of them are listed below. For a more complete list visit the Trains.com Magazine Index - you will need a (free) account on Trains.com to use the index.
- Select list of magazine references to be supplied after research is completed.
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