Wednesday, January 31, 2024

First draft of an EVRR control panel

First draft of a control panel schematic

One thing I didn't mention in the EVRR video was that there several possible electrical decompositions of the layout. All involve dog-bones with a reversing loop on each end. After thinking things through a bit more I'm likely to go with the electrical layout shown in the schematic on the left.

In this scheme the upper loop has been moved over to the right so it doesn't over lap and confuse the track in the valley.

New decomposition superimposed on track plan
This new decomposition  is also a dog-bone (shown by the blue line) with the lower loop going around the big lake instead of more-or-less the entire valley. This leaves the valley track (shown by the green line) as a completely separate block where a second locomotive could do some switching, isolated from the loco running the dog-bone


Decomposition shown in the video
Over on the left is the electrical decomposition shown in the video. In this version the loop in the valley is much larger. The problem is the green leftover track sections are just that, leftovers. On the new plan the green track is almost a second switching layout.

E. L. Moore could have used either scheme, or something else. I have no information on how it was wired so it's basically an aesthetic judgement about which to use. Right now I'm thinking the new one is the one.

Next up will be giving some thought to making the schematic a lot more understandable :-)

4 comments:

  1. Today with a pair of auto-polarity-thingamajigs and some auto-switch-motors, one could have worry-free operation on the "loop-to-loop" main. But in Moore's day such electronic wizardry, while possible, was just not his thing. Just running a train from reversing loop to reversing loop would involve at least a pair of dpdt switches to reverse the loop polarity. The switches could be sprung in HO but I've never seen it done in N. Running the main would require vigilance. Could be one reason why he didn't run it often.

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    1. That could be. With just DPDT switches I agree the operator would have to be on his toes, flipping switches, and keeping an eye on train movement. Maybe that just wasn't fun.

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  2. With the amount of track there, he really should've just built a twisted circle of track... looped over itself, with almost a figure 8. An over-and-under loop.
    Then put a couple of switches near the station, perhaps. ELM has said he didn't much like complicated wiring, then he builds this!

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    1. Yeah, it's an interesting contradiction, but maybe here is where he developed his interest in simplicity.

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