Templot Club Archive 2007-2020
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posted: 14 Jul 2008 02:28 from: Ian Everett
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Dear all, I would love your collective wisdom on this matter. I am developing a model railway room in my new house for my "final P4 project", a typical U-shaped terminus to fiddle yard layout layout which will require the lines on the two sides of the room to be connected by a 90 degree double track curve at one end of the room. In our house we have two options: 1) partitioning off part of a large floor area, which would give me effectively any size of room that I need 2) Using an existing room 8' wide. (1) is more expensive than (2) and has other disadvantages so although our initial idea was to create a 9 ft wide room, we now favour option (2), an 8' wide alternative location. In my initial plans my working assumption was a room 9' wide. I am worried that a room only 8' wide would not allow enough space for the 90 degree curve. Given the absolute importance of such a curve being reliably negotiated by trains do you think that 8' will give enough width for reliable operation round the curve? I anticipate using transition curves to smooth passage through it. Has any one any experience of successfully working a P4 layout with such a configuration? Or being unsuccessful!? TIA. Ian P.S. Very few emails have come through to me over the last couple of days. Was it something I said or have I a problem with e.g. an over-eager spam filter? |
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posted: 14 Jul 2008 02:30 from: Martin Wynne
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Ian Everett wrote: connected by a 90 degree double track curve at one end of the room.Hi Ian, I think you mean 180 degrees? Martin. |
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posted: 14 Jul 2008 02:40 from: Ian Everett
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Martin Wynne wrote:I think you mean 180 degrees?I'm a daft buggar - of course. Hangs his head in shame... |
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posted: 14 Jul 2008 03:41 from: Martin Wynne
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Ian Everett wrote: 2) Using an existing room 8' wide.Hi Ian, Something like this maybe? ian_room1.png  The curves are approaching the limit for P4 but should be just about do-able with some gauge widening. Everything depends on what you want to run round them, of course.  You could ease the radii a little by shortening the S-transition zone, but that might restrict the available length for the station throat. How long is this 8ft-wide room? regards, Martin. |
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posted: 14 Jul 2008 03:55 from: John Lewis
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What you don't say is what sort of trains are you planning to run. The Great Bear and GWR 47xx 2-8-0s may be less forgiving than if you are planning to run multiple units. John |
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posted: 14 Jul 2008 04:14 from: Ian Everett
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The room is 26' long - plenty of space for S-transitions, as you suggest. Ian |
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posted: 14 Jul 2008 06:43 from: Paul Hamilton click the date to link to this post click member name to view archived images |
I would go for your Option 1 of course! The possibility of the larger area will never be repeated I am sure. I am having enough struggle with fitting EM into 11'6" x 9' at the moment and would love an extra 12" or so. | ||
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