Showing posts with label "L" structure. Show all posts
Showing posts with label "L" structure. Show all posts

Sunday, November 22, 2015

Interesting Article

734 Electric Railway Journal Vol. 154, No. 20

Construction Begins on Dunsel Line

Sources close to the company have reported that construction has begun on the Dunsel Line. The company has acquired a right-of-way 60 ft. wide through Edgewater. The 0.05-mile line now under construction will have four tracks elevated approximately twelve feet above ground. These will rest on a solid-fill embankment with concrete retaining walls.

Chief Engineer Leif DeFurst has said that no special track work will be required at present. Mr. DeFurst went on to say that tracks and ties will be ordered as soon as possible. These are expected to be of the prefabricated type utilizing code 125 rails of nickel-sliver. In all, there will be four tracks such that when the line is completed, there will be dedicated local and express tracks in each direction over this segment of the line.

Plans for the new road call for third rail electrification along its lines. Code 100 nickel-silver rails of the standard type will be employed. The top of the third rail will be situated 6-½" above the top of the running rails and the center line of this rail will be 20-1/8" from the inside of the running rail so as to be of the same type currently employed on all the rapid transit lines in Chicago. This means that upon completion, the new road will be unable to host cars from other roads not so equipped. Chief Engineer DeFurst has stated that erection of standard trolley wire over the westernmost track is being considered, but is not an immediate goal.

Monday, October 19, 2015

Arches

I've been behind on updates since July and now I've got to try to catch up.

In addition to beginning work on the 5000, I also acquired new project. Back in October 2014, I purchased a set of Walthers North Shore ends on a whim. I had no plans for them and figured they might be useful down the road for trading or something. Later I was able to acquire a Walthers arched roof and mats. Again, purchased them only because they were available and decently inexpensive. (It should be obvious where this is going.) A few months ago I found a pair of Walthers “interurban sides” that were appropriate for a North Shore car. My new project is to assemble and complete this Walther’s North Shore kit. The car sides (specifically the window arrangement) put this car in the high 700s. I haven’t decided whether or not this car will be powered or even if it will be part of the Skokie Valley or Shore Line trains. It’s a low priority project; something for the backburner. In an email blast a while back, I saw a picture of a North Shore car built from a Walthers kit on the Salt Creek Lines. I’ve forgotten who built it, but it looked superb and betrayed nothing of its rather average beginnings. With the right amount of effort, I have high hopes that my planned car will look as good.

I've also done some 3D modeling. I went back and decided on a shape for the arches atop the support columns under the viaduct. I settled on useing a circle to create the curve of the arch although the shape of the actual arch is closer to a vertically squashed semicircle. The idea here is to make a mold of a 3D printed master since I’ll need fifteen middle columns and six end columns for the viaduct. I am yet to determine a method of actually doing this and I’ve also yet to select a material.

Circular arches. The green is simply a marker for how high the curb/sidewalks need to be and is not part of the model.

Once a suitable interior shape was developed to make the structure hollow (done to keep costs low[er]) I had it uploaded to Shapeways and printed. As soon as this went through, I suddenly realized a miraculously simple way of producing the "squashed semicircle" shape for the arches that I wanted. All that's required is drawing a circle and then rescaling it vertically, but not horizontally. The result is an oval.

"Squashed" arches. The difference is subtle, but the arches are a much closer match.

Meanwhile, the original design was printed and shipped out. The results were... less than optimal.

Looks okay so far.

Oh. That's not right.

Not sure where the surface stuff came from, but that should be easily sanded off.

It's difficult to see, but the piece is actually slightly curled.

I'm actually not too worried about it since the arches need to be redone anyway.

Sunday, December 7, 2014

Time to Focus

In the past two months I've continued working in Sketchup on a number of the projects outlined previously. None of them are, as of yet, finished. I was trying to take care of a few other things at the same time, but that cannot completely account for the lack of progress. After some consideration I've come to the conclusion that I've been trying to work on too many things at once. A distinct lack of focus has been a chronic problem of mine and this jumping from project to project has not helped the situation at all.

In order to get back on track, I'm going to work on one project at a time. The first order of business is getting back to the interior of the 3200-series cars. The last time I discussed this, I had recently gotten the prototype seat back from Shapeways and was relatively pleased with the result. That didn't last. As I discussed in that post, I left the possibility open that I might try my hand at making the scoop in the seats. Lo and belold! I did just that. (This is the hazard of never being satisfied with your own work.)

They aren't "perfect," but I am satisfied with how they look. (For now.) I haven't printed this design yet, although it did pass Shapeways' file initial and wall thickness checks when uploaded. That's good enough for me and I've gone ahead and begun designing the different types of seats found in the 3200-series. These are (from memory) as follows:

  • Single seat with handhold (pole on left)
  • Single seat with handhold (pole on right)
  • Single seat without handhold
  • Double seat with handhold
  • Double seat with handhold and ventilation box
  • Double seat without handhold
  • Wheelchair position double seat (flips up)
  • Longitudinal double seat with windbreak on left
  • Longitudinal double seat with windbreak on right

Shapeways digital preview of some of the pieces to be made. The scoops are more evident in this rendering than they would be in a screenshot from Google Sketchup.

The problem with simply printing the chairs is that a fair number of them are not self-supporting. They are (naturally) small and somewhat fragile. Trying to accurately mount something of this type to the floor of a model sounds like a chore and a half. I've thought about this for some time and eventually came up with something I'm willing to try.

The obvious answer is to print them as part of the car floor and be done with it. Unfortunately, this would be expensive to do (still earning vet tech wages) and the product is too large to be produced by the Frosted Ultra Detail printers. (The details are too fine to be printed in anything else.) My solution is a sort of compromise on this idea. I plan on dividing the car into three sections (front, middle rear) and designing the interiors in these sets. Each set will have all of its "furniture" (chairs, windbreaks, door pockets, etc.) created together and mounted onto a thin "surface floor." The three sections would then be placed end to end and mounted onto the real car floor (made of an inexpensive, but durable, material) and slid into the car body as one piece. Doing it this way solves the problem of mounting the chairs properly (without damaging them!), positioning them correctly, and also will allow me to make the grooves in the floor fairly easily. The grooves can also help to hide the separation lines between the three segments. We'll have to see how well this works and how expensive it turns out to be...

There has been a definite success with the printing. I sent off the updated version of the snowplow frames and received the finished product days later. These are a resounding success. I just have to fit them with the blades (to be made from index cards) and paint them.

These are remarkably crappy photos, but they do illustrate the point. This is a pair of snowplow frames, held back to back by sprues. They have a good amount of detail (which probably won't even be seen) and are decently strong. They're also reasonably flexible so they shouldn't break too easily.

I also have some new acquisitions to report: CA&E car 500 and a section of the Lake Street "L" structure. Both of these come to the Dunsel Line via the Chicago, Wheaton & Western (my father). He's beginning to focus on some other things and has come to the conclusion that he won't be doing anything with either of these, so he gave them to me.

The 500 (which could also be built into a North Shore Line 350-series streetcar—yeah right) is from a kit produced by Greg King. Currently it is completely unassembled, although it did come with a Q car power and trailer truck set. The downside is that the power truck is only set up for overhead operation. This will pose a slight problem as my (eventual) layout will be two rail, but for the time being it doesn't matter. (I'll probably also change out the power truck later.)

The Lake Street "L" structure is from a portion of the line with provision for only two tracks and the majority of support columns in the street and not anchored at the curb. The structure is somewhat old and slightly brittle. When removing it from my father's basement, I accidentally slightly tapped one of the columns against a wall and it broke off. (Apparently this has happened before.) I believe it is still structurally sound, so I'll fix it and post photos of it at a later date.