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Author Topic: Peco Setrack Curved Points  (Read 17780 times)

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Offline Roy L S

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Re: Peco Setrack Curved Points
« Reply #30 on: July 12, 2015, 10:03:56 PM »
The text in my post was a direct quote from a Peco email to retailers sent out on Friday,

Interesting as that conflicts with what I was told in my conversation with a Peco employee at the Peco shop on Wednesday!

If we see them in the shops then clearly my info was duff which would surprise me since it came from the horse's mouth so to speak...

Roy


Offline Agrippa

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Re: Peco Setrack Curved Points
« Reply #31 on: July 13, 2015, 01:24:32 AM »
I asked Peco  about these and the reply was they were available and should be
with the dealers shortly so we shall see, unless some last minute problem
has cropped up.
Nothing is certain but death and taxes -Benjamin Franklin

Offline Agrippa

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Re: Peco Setrack Curved Points
« Reply #32 on: July 13, 2015, 11:35:13 AM »
Antics website has a schematic showing the points with the additional
track sections , described as " available soon ".
Nothing is certain but death and taxes -Benjamin Franklin

Offline keerout

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Re: Peco Setrack Curved Points
« Reply #33 on: July 13, 2015, 09:27:32 PM »
Hi friends,
I am a bit confused, in an E-mail from GM, is a pic of a crossover with peco settrack points.
In it, both inner AND outer curves have a st-15 piece  ???
My question is, how can that be?  :worried:
A typo?
I'm very confused now  :help:
Gerard
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Offline Dorsetmike

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Re: Peco Setrack Curved Points
« Reply #34 on: July 13, 2015, 09:53:23 PM »
Might that be to keep correct spacing between tracks?
Cheers MIKE
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Offline Agrippa

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Re: Peco Setrack Curved Points
« Reply #35 on: July 13, 2015, 09:59:43 PM »
Yes , that's a bit puzzling, it must be to do with the ST 47 sections
and the other sections  ST 43 and ST14 , as the illustration is just
a schematic it may be that the outer curve is not a true arc and
the design allows the ends to match up with 2nd and 3rd radius
curves, but its a bit....... ???
Nothing is certain but death and taxes -Benjamin Franklin

Offline keerout

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Re: Peco Setrack Curved Points
« Reply #36 on: July 13, 2015, 10:22:20 PM »
In the peco book I have, st15=2nd radius. If the x-over is 2nd/ 3rd, the outer curve would be st17 ...
I think it's a mistake/typo, otherwise, the curves would converge.
Gerard (still confused)  :wave:

Offline DELETED

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Re: Peco Setrack Curved Points
« Reply #37 on: July 14, 2015, 10:24:21 PM »
I'm 50-50 that diagram is just a schematic.  But out of interest I overlaid the ST15 curve in powerpoint to see if it was the same (you could do the same simply by printing out two copies and cutting them out and laying one on top of the other)...



...It's very close for a quick check, if not the same allowing for a small alignment error.  Whether that's true in real life or not I'm not sure.  The statement about the rail heights between the codes is incorrect so maybe there's a little more to this also.  I had an afterthought from doing the pic above and just checked whether the outer curve was constant radius and it looks so when I overlay a circle.  Makes me believe less that the same radius curve is used for the inside line also but I am happy to be corrected.


Offline Ian Morton

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Re: Peco Setrack Curved Points
« Reply #38 on: July 15, 2015, 06:11:16 PM »
Here are the images I wasn't able to upload earlier - all from Peco.







Offline Mr chapman

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Re: Peco Setrack Curved Points
« Reply #39 on: September 20, 2015, 12:32:14 AM »
Anyone used one of these yet? I heard that the 00 version can cause derailment issues. But the N is a much newer product. I'm looking at using one in the future and want to check it wont cause problems.

Thanks.
DCC southern modeller

Offline class37025

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Re: Peco Setrack Curved Points
« Reply #40 on: September 20, 2015, 09:58:13 AM »
I'm 50-50 that diagram is just a schematic.  But out of interest I overlaid the ST15 curve in powerpoint to see if it was the same (you could do the same simply by printing out two copies and cutting them out and laying one on top of the other)...



...It's very close for a quick check, if not the same allowing for a small alignment error.  Whether that's true in real life or not I'm not sure.  The statement about the rail heights between the codes is incorrect so maybe there's a little more to this also.  I had an afterthought from doing the pic above and just checked whether the outer curve was constant radius and it looks so when I overlay a circle.  Makes me believe less that the same radius curve is used for the inside line also but I am happy to be corrected.


I phoned Peco and spoke to a guy in their technical dept to query this, as I'd thought 2nd and 3rd radius would have been correct.

he confirmed that the diagram in their adverts is correct, but pointed out that the curved track used was 2nd radius to complete the 90 degree turn.

hope that helps.

alan
typed by fur box mechanic - dictated by brain on a chain

Offline Sprintex

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Re: Peco Setrack Curved Points
« Reply #41 on: September 20, 2015, 10:39:25 AM »
it may be that the outer curve is not a true arc and
the design allows the ends to match up with 2nd and 3rd radius
curves,

Got it in one :thumbsup:

There was an explanation of how the geometry works in the August edition of BRM magazine. The problem is most assume that it is just 2nd and 3rd radius curves "overlaid" to make a point - not so.

Basically both stock rails of the point are 2nd radius, although the outer stock rail has a short almost-straight section at each end to make it more equivalent to 3rd radius which is added to by the ST43 short straight. The point blade leading to the outer curve is more-or-less straight in its entirety to continue the illusion. The ST47 curves are there purely to maintain Setrack spacing.

In other words it's a fudging of the geometry to make it work in more situations than just connecting a 2nd radius and 3rd radius curve ;)


Paul

Offline robert shrives

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Re: Peco Setrack Curved Points
« Reply #42 on: September 20, 2015, 12:16:32 PM »
Hi,
Bought two at the new sited Sutton Coldfield model railway shop in the West Midlands. To try and build a test layout for micro trains copulers.
They look good and seem quite sturdy, early days yet but runok.

Thanks Sprintex for answering the curves advice on packaging.
Robert

Offline HalfTheSizeTwiceTheFun

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Re: Peco Setrack Curved Points
« Reply #43 on: October 11, 2015, 12:26:00 AM »
Here are the images I wasn't able to upload earlier - all from Peco.









I added the ST-44/45 curved track work into RailModeller, by visually comparing the ones I bought from Rails a couple of months ago with existing track work, but can't reproduce the example given on the back of the packaging I have unless I replace the ST-16 at the top by an ST-14. I see other modellers - and possibly Peco - have made the same amendment.

Offline mojo

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Re: Peco Setrack Curved Points
« Reply #44 on: March 26, 2016, 10:27:44 PM »
Has anyone had  experience of usage of these points and if so would they be willing to share an opinion as to there practicality please.

 

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