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Author Topic: Single/Double slip radii  (Read 1829 times)

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Offline Trainfish

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Single/Double slip radii
« on: August 12, 2012, 01:08:15 PM »
I don't suppose anyone knows what the radius or I suppose angle is on these do they? I've looked at the Peco site but it doesn't appear to say what it is. I want to form a crossover which involves a point on the outer track which leads to a single slip, then to a double slip and finally another double slip. Below is what I intend doing to give access to my fiddle yard via 1 track, I will also be doing the reverse at the other end of the fiddle yard.


I have printed out the Peco templates and stuck a large radius point to the end of 3 slips but the angle of the point just doesn't look right to me.
John

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Offline Jack

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Re: Single/Double slip radii
« Reply #1 on: August 12, 2012, 01:31:00 PM »
I have two double slips that I'm building into my yard area. All I can say is that Code 55 geometry (which the S/S & D/S are) is different from Code 80 so that any points that feed directly off the slips need to be Code 55 as well. I learnt this the hard frustrating way.

Hope that helps.
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Offline martink

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Re: Single/Double slip radii
« Reply #2 on: August 12, 2012, 01:38:24 PM »
All of the code 55 pointwork use a 10 degree angle.  The longish pieces (long radius points, curved points, three-way points, long crossings and slips) will naturally give a 27mm track spacing when connected directly together.  The short radius points will give a tighter spacing, and I'm not sure about the mediums.  If you need a wider spacing (such as between B & C in your diagram), you are going to have to add 2-4 inches of straight track as a filler.

Offline Trainfish

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Re: Single/Double slip radii
« Reply #3 on: August 12, 2012, 10:51:11 PM »
All of the code 55 pointwork use a 10 degree angle.  The longish pieces (long radius points, curved points, three-way points, long crossings and slips) will naturally give a 27mm track spacing when connected directly together.  The short radius points will give a tighter spacing, and I'm not sure about the mediums.  If you need a wider spacing (such as between B & C in your diagram), you are going to have to add 2-4 inches of straight track as a filler.

Ah yes, I've been having a play with actual large points and slips etc rather than templates and they do seem to work as in my diagram. I take it that 27mm spacing is centre to centre to give the standard streamline spacing. There may well be a wider spacing between B and C but that will be decided once tracklaying begins. I just want to make sure I've got all the geometry correct before purchasing 6 sets of slips (ok 5 as I already have 1) as they're not exactly cheap.

Jack, it will ALL be code 55 so I have no concerns there but thanks anyway.
John

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