Okay, so this update is long overdue. In the intervening weeks I have had some successes with my models and my "layout." I have come to the decision (largely in part because of the purchase of the 2000-series cars) that the Dunsel Line will not be a traditional trolley layout. It will be a two-rail layout equipped with dummy third rail. This will allow operation of CA&E, North Shore, and "L" equipment even if the cars (such as the 2000s) are not equipped with trolley poles or pantographs. This will necessitate the pole- or pan-equipped cars to built to accommodate two modes of running, as they should be. This does come with a downside.
Prototypical placement of the third rail on the "L" has the top of the third rail 6½ inches above the top of the running rail and 20-1/8 inches from the inside edge of the running rail to the center line of the third rail. Contact with the third rail is made by a metal shoe (or a paddle in the case of very early AE&C cars). Contact with the third rail is made by gravity: the shoe naturally hangs and then glides across the surface of the rail when present. The problem here is that most on models, the shoe has been made in the free hanging or "down" position. This is fine for trolley operation as when under wire, the shoes should hang freely. With prototypical third rail placement, the shoe now hangs too low for operation. The MTH "L" cars have the shoe in the up or "on rail" position. This works well for prototypical placement unless the third rail is on the non visible side of the model or at gaps. In these situations the shoe isn't hanging when it should be.
A trolley beam on a St. Petersburg 2000-series car. The shoe is depicted as hanging free. This would collide with a prototypically placed third rail.
MTH made the shoe in the "on rail" position.
There are three ways to work this problem. The first is to use the commercially available trolley beams in the free hanging position and adapt the height of the third rail accordingly. The other is to use the on rail position and place the third rail according to where it will be seen by the viewer. I'm not entirely satisfied by either of these options.
The third option is, if at all possible, is to create a trolley beam with a third rail shoe that functions like the prototype so that it can glide or dangle as need be. I'm a neurotic freak so this sounds extremely satisfying. I had this idea in the past, but dismissed it due to my inability to construct such a small thing effectively. But now I can have things 3D printed! And according to the specifications on Shapeways' site, many materials do allow for moving parts if proper clearance is built into the design. Looks like I've got a new project...
Granted, this won't take into account the placement in the third rail given the difference in scales (1/48 vs. the 1/45 for the MTH cars) but I'll just have to live with it.
This actually leads to the first of my successes. The prototype seat for the 3200-series cars arrived from Shapeways on Monday and I’m pleased with the results.
This took far longer than I’d expected and was also fraught with no small amount of frustration. The first problem was getting the angle of the seat back to my own satisfaction (picture a weirdo riding the Ravenswood messing around with perfectly normal seats with a protractor and a crude, improvised plumb bob). The next (and far more frustrating) bit was to create the handhold on the back of the seat.
I was very much relieved to discover that the handholds on the 3200s are much simpler than their counterparts on the 22-, 24-, and 2600-series cars. Until I tried to produce them, that is. The process involves making an appropriately sized circle which will be the “pipe” in question and then drawing a curved line representing the path of the pipe. In this case, the path went up from the circle, curved to one side, continued horizontally, and then curved down to the same height at which it started. Once that path is created and placed on the appropriate plane (another interesting quest in of itself) and positioned with the start at the center of the circle, the “follow me tool” is used to extrude the circle along the specified path. Simple. Or not, as I kept getting error messages that people in Youtube videos never seemed to get.
Once I realized that the problem was that some combination of Google Sketchup and my computer was being a lazy pile of rancid horse turds, the project moved along swiftly. (No Skokie pun intended.) My problem was that I was trying to create the curve in 1/45 scale. This was simply too small for the program to handle. It wouldn’t do the math. However, once I scaled up the curve/circle combination to a large enough size, I was blessed with numerous beautiful curved pipe segments. Armed with this, I used the scale tool to reduce the piece to the appropriate size, and voila! (Apparently Sketchup has no problem rendering such a small thing, it just doesn’t want to draw it.)
Once that hurdle was cleared, I saved my file, exported it as a .dae (which is a file type native to Sketchup 8 and can be read by Shapeways) and sent the .dae off to be printed. And like that, it was done.
The question I keep getting asked when I’ve shown this thing around is, why did you only make one? I wanted to produce one seat just to determine what the end product would look like on a simple design and then rework my design from there. A single transverse seat seemed like the best option. This was printed in “Frosted Ultra Detail.” There are other (cheaper) alternatives available, however none of the other materials were sufficient to produce the detail included and wouldn’t pass some of the initial checks.
There was a slight (and I do mean slight) problem in the printing process. I didn’t include the stanchion that connects to the handhold on the back of the seat, but I did include the connection for it. This is the little nodule in the corner. This is an object that is shaped almost like an inverted, blunted, ogive cone. It is quite diminutive, but still bigger in diameter than the bar itself. The problem is that it didn’t print fully. There’s a “gap” in the back. Fortunately, it is so tiny that it isn’t very noticeable.
Now that I’ve seen what it looks like, I can say I like it and I can go ahead and make up the other variants. (Assuming I don’t go back and try to add the curves to the seat back and “cushion.”)
This still leaves the problem of the stanchions themselves. Still haven’t figured that one out just yet.
The second success is that the Dunsel Line has acquired a new piece of rolling stock! I am still waiting for it to arrive, but it is a high numbered 700 North Shore Line car in brass. (My knowledge of the North Shore isn’t what it should be, so I can’t identify the specific series until I consult my father’s CERA bulletins.)
This is my first North Shore model. The model didn’t come with trucks, trolley poles, or even a box. (This is why I it wasn’t identified when I purchased it.) What it does have is a few dents on the roof and some tarnish in a few spots, but these things should be easily fixed.
The plan here is to paint it in the final variant of the North Shore’s green and red and equip it with appropriate Q Car Company trucks insulated for two rail operation. Power will be supplied by a pair of NWSL Magic Carpets. A selector switch will, of course, have to be installed for two rail or trolley power. Poles will also be Q Car.
Exciting times ahead!
