You may have heard that half of the current SNR came from our last house. When it was adapted to the new house, the "bridges" segment was placed at an angle to the wall, rather than flat against it, as previously. This required a change to the track alignments in the tunnels, where they run through the wall and around into the staging loops.
The green are the sections that came from the old house, and the blue is the new construction to link them together in the current house.
The lower level of the "bridges" segment (leading to Amherst, Va. staging) already had a transition joint on the curve, from code 83 to 100. Moving that section to the new house required an additional joint in the code 100 -- and that landed right where the approach entered the freshly-chopped hole in the concrete block wall. I installed roadbed into the hole from the other side, with the track already spiked to it -- but sadly the alignment was less than perfectly linear.
Nonetheless, things ran -- until, over time, they did not. Several years ago, the Mallets started popping their pilot trucks off. I fixed this, in a Vice-Grip Garage sort of way, by not running Mallets to Amherst anymore.✅
Recently, though, the Broadway Consolidations, whose bread and butter is working between Amherst and Millsbrae staging, started departing the rails utterly. They would exit the tunnel entirely on the ties, and grind their way valiantly back up onto the rails -- except it was onto the guardrails of the bridge.
No choice now -- it had to be corrected. But how?
I'd already tried to fix the transition joint, on a curve, deep within a mountain, between the tunnel liner walls which could not be removed without dismantling the whole end of the layout. Yyyeah. That effort resulted in leaving myself a note on the tunnel roof inside the mountain -- along with a stern warning...
Since both joints are at least 3' away from the viewer after "mountaintop removal", I took a closer look with the Borescope. The "alignment" on the code 100 joint was awful enough (bad Keith!) -- although it may have been a casualty of humidity change, too. But the transition joint was astounding -- one side had come completely unsoldered over time, likely from my failed attempts to fix it... on a curve, between tunnel walls, from 3' away. Per the signs.
Dead. The only choice at this point was to rip out the entire curve, from the end of the bridge at Dominion around to the throat turnout in Amherst staging, and replace it outright. And that meant with a single, 9' length of flextrack done properly: soldered on the workbench, in free air, in a straight line, and at eye level -- and cut to fit in place. So it was going to have to go in through the tunnel portal, like endoscopic surgery.
After substantial stewing, I determined how long each piece of flex needed to be to place the new joints on the shallowest parts of the curve possible. And since I'm not Edward Scissorhands, there was no way I'd be able to spike the new track down accurately, from 3' away, on a curve, in between tunnel walls.... So I ordered up an assortment of 3 million teeny self-tap screws, figuring I could go straight down from above.
After this much planning -- and stewing -- I felt I'd finally gotten the odds shifted into my favor that the SNR would ever run again. So I took a deep breath and started ripping out 32-year-old trackwork (along with its 24-year-old bandaids).
The removal wasn't as bad as I thought. There were only a couple of feeder pairs, and not too many inaccessible spikes. Luckily I could get my arm into the wall from the staging side to clean everything up, without even having to move the refrigerator. I marked the alignment before removing the old track, so I'd be able to replicate the curvature. Flushed with success, I treated myself to some Operator's Fuel Pellets.
The first task in the rebuild was the transition joint. I've done a million of them, with all the 83-to-70 joints that are on the layout -- but as a species they are not renowned for their sideways shear strength. So I did this 83-to-100 guy on the workbench, girding each side with some .039 bronze rod, so it would hold true when flexed into a curve. I freakin' dare it to come loose.
Now since a 9' length of flextrack would be... well, flexible... to the point of being unwieldy... I did the second joint in situ at Dominion, once I'd worked the first 6' section up the pipe via the tunnel portal. When the solder had cooled, the whole 9' length could then be snaked the rest of the way in.
The screw idea worked like a champ. I used a 7mm length, which would go through the ties and all of the cork, but not hit the plywood subroadbed and start fighting, lest it wreck the alignment. I predrilled holes liberally down the whole length of the hidden piece, not knowing which ones I'd be able to reach. The visible end got spikes as normal.
Over on the staging side of the wall, I could get to the approach section readily, with only minor contortion and personal injury. So that track got spiked into the homasote like usual. Following the original alignment markings got me a straight joint at the throat turnout, too, and with the transition curve intact. I then left the straight segment, through the wall, to float.
Last step was reconnecting the feeders, which was a bit of a challenge, holding on to the soldering iron by little more than the cord, but it got done.
Oh yeah I also needed to cut a gap into the curve after the fact, so that staging's master kill switch would work. 🙄 That was accomplished with a Dremel, many spikes, and piles of gap-filling ACC carved to rail shape.
But hey -- first test, and behold! Mallets' pilot axles stay on the rails! Even Consolidations' drivers stay on the rails! And the right rails, too!
Phew -- I had been dreading this job. I guess this is why normal people tear old stuff down and start over -- 'cuz it's so much easier. But where's the fun in that? 🙂
Thanks as always for reading, and let me know what you think!
EPILOGUE
In an image time-warped back from the 21st century, the SNR has been bought, and its original line through the Blue Ridge abandoned. I'm told that at the date of this photo, negotiations will be under way to transfer the RoW to the Commonwealth of Virginia for use as a bike trail, although the removal of the venerable truss bridge will have presented a challenge.