Calico Gold Company #2, the Walter Knott, fresh from the paint shop and on its way to the CGC facilities for final outfitting. Building this little On18 mine locomotive is the subject of today's post.
Before I start building benchwork and laying track on my On18 Calico Gold Company layout, I wanted a relatively simple On18 locomotive to pull some trains with. After doing a little research, I decided on a vertical boiler design that starts with a 3D printed shell from Tebee Models at Shapeways.com, atop a smooth running and reliable Kato 11-103 drive unit. This is my first real build in On18 and my first time using 3D printed parts. Despite the learning curve, the little steamer is coming together quickly.
The two axel Kato 11-103 drive unit is 2.125" long by 0.6875" wide. I'm using my N scale Pagosa & Southern switching layout as a test track.
The next challenge was to smooth out the rough 3D printed surface and make it look more like metal. Conventional wisdom says this should be done with primer and repeated sanding but I was concerned that too much sanding would wear away the details. Acetone vapor smoothing has been recommended for 3D printed parts but that only works for ABS plastics and not for polyamide nylons. I found a technique online for using several coats of plastic primer to smooth the surface so I decided to give that a try.
More or less satisfied with the smoother surface, I masked off the black areas an sprayed the tank and bunker with satin finish Hunt Club Green. This is the "official" green for all CGC equipment.
While I still had the flat black paint out, I masked off the green water tank and bunker and gave everything else a coat of the flat black to dull it down.
With the brass bands in place, the firebox and throttle assembly were glued to the boiler with thick ACC.
At this point, the Walter Knott is starting to look less like a collection of parts and more like an elegant early steamer. There are still many details to add: steam pipes, gauges, a headlight, bells and whistles, and link and pin couplers among other things. I also need to decide on whether to add a cab or not. There is much more still to be done but it will have to wait until more parts arrive. That's going to wrap it up for this time. Thanks for checking in, amigos. Adios for now!