Thursday, October 29, 2015

Homasote Splines

I constructed the base for the test track out of Homasote Splines this evening.  The finished product seems like it will work well, but there were some rough spots getting here.

 First, while those knife-edge blades leave a very nice edge and generate a fraction of the dust that anything with teeth would, they seemed prone to wobble, especially as they warmed up.  This meant I constantly needed to make fine adjustments to the jigsaw attack angle and was prevented from using a guide like I had hoped.  The result is some slightly wavy cuts.

This makes for a tedious process with lots of long slow cuts, so I tried doubling and quadrupling the material.  Anything more than two and the blade would wander too far on the bottom piece and leave you with nothing but scrap.

Alas I got eight good two-foot long pieces that overlapped to form a three-foot long section.  I used a standard wood block plane to smooth down the top (track) surface and screwed on a left over piece to the bottom side to make up for the variations in piece height.  This is only necessary since this test section lives at the workbench.  Normally, the pieces will (should!) get cut closer to desired size and the bottom just screws onto the risers or other benchwork supports.

So, it might be that future spline production is done from full sheets on a table saw outside.  In mid-November, I'll be visiting a model railroad that uses this track support technique, so construction details will likely be some of my questions.

In other news...I ordered a full set of the tie rack jigs from Fast Tracks -- one of each spacing (20", 22", and 24").  My research trip did yield that the tie spacing was 20" -- at least on the remaining track where one could actually see the ties.  This was close to a turnout, so I didn't take it as gospel that the whole line used this standard.  Some variation, especially between more and less frequently used tracks will provide some visual appeal as well.

For this test track though, I doubt I'll wait until the jigs arrive.  Shouldn't be too hard to lay 3 feet of ties by hand.

Looking ahead to track laying, I'll close with some prototype photos.  It should be fun replicating track in this condition (and having it still operable)...

Tuesday, October 20, 2015

Quick Update

I usually try to keep the project-related postings coming about once a month and in order to keep that frequency, here's a quick post about current plans.  The GBW 7080 project was moving along nicely, culminating in getting couplers mounted on it when I realized that in order to make any more progress, I'd have to have a test track in order to confirm coupler heights and finish work on the trucks. Since P:48 is new for me, many projects pause while waiting for the next internet order of supplies and tools and funds from the sale of unused HO scale equipment.

The plan is to create a two-foot test section of track both to try out some of the construction and detailing aspects and result in a functional test track.  I"ll build this on homasote splines.  To that end, supplies have been rolling in to get that test track going:
While at Red Cliffs, I also ordered the parts to make a #8 turnout as well.  The corresponding kit from American Switch & Signal turnout castings are lined up for the next Protocraft order to compare.

Also, I have one more opportunity to visit the prototype here in the next week, albeit probably only briefly.
Chief research items are:
  1. Length of switch points in the three remaining turnouts, including the one to the mainline if I can safely measure it.
  2. Spacing between the cross ties.  This is branch line trackage and I'm trying to decide which -- if any -- of the Fast Tracks tie jigs can help me or if I should just roll my own.
  3. Number of holes in the tie plates.   I'm assuming four-hole, as this was light density trackage.
Stay tuned for construction progress and photos.

Oh, and fun fact, this is post #50 since the beginning on 27 April 2013 (907 elapsed days [~2.5 years] and an average of one post every 18 days).