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Author Topic: Helix kits or design ideas  (Read 372 times)

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Offline stuartgoble

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Helix kits or design ideas
« on: July 12, 2018, 09:49:28 pm »
Hello all,

I've been reading a number of the posts on the forum around gradients and have been struggling with the design for the second (scenic) half of the new layout.  I had originally hoped to be able to install a small reverse loop and storage sidings under the section, but I've now come to the conclusion that to create enough hand space in case I need to get in there, the inclines are just too great.

So I'm now looking at a small single track helix to wind up and down from the reverse loop and storage sidings.

Has anyone ever bought a kit for this, and if so where from (I'm kind of in the dark on these things) or has anyone found any useful designs for homegrown helix's?

I've found a number of helix calculators on the web, but these appear for OO and downscaling them, though possible, is a pain.

As always, any guidance is welcome.

Stu...

Offline Newportnobby

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Re: Helix kits or design ideas
« Reply #1 on: July 12, 2018, 09:56:13 pm »
Plenty of YouTube vids to see here, Stu........................

https://www.youtube.com/results?search_query=constructing+an+n+gauge+helix

We also have a resident expert in @Maurits71

Offline Kettle

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Re: Helix kits or design ideas
« Reply #2 on: July 13, 2018, 09:19:31 am »
Hi, Model Railway Solutions have number kits available,I have used their base board kits which I am very pleased with.

modelrailwaysolutions.co.uk


Offline woodbury22uk

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Re: Helix kits or design ideas
« Reply #4 on: October 22, 2018, 11:27:58 am »
On the French N Gauge Forum a member is 3D printing helix segments which can be stacked, hopefully without finessing the adjustment at each turn. The segments are 22.5 degrees each (16 segments per circle), and as printed give a 48mm rise between levels. There is a slot for two Peco tracks in R2 and R3 (not sure if that is UK R2/R3, or the smaller continental R2/R3). For a 9 inch curve the ramp angle works out at 1 in 30.

Although the content is in French the photos are fairly self explanatory.

http://le-forum-du-n.forumotions.net/t30582-impression-3d-rampe-helicoidale
Mike

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Wondering how many pedants can dance of the head of a pin.


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Online njee20

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Re: Helix kits or design ideas
« Reply #5 on: October 22, 2018, 12:03:59 pm »
That's really cool!

Proses also do (did?) plastic helix kits, I recall they were rather expensive.

Offline Belly

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Re: Helix kits or design ideas
« Reply #6 on: October 22, 2018, 03:33:35 pm »
Hello Stuart,

Welcome to the world of the helix!

From my own experience, having built two for my own layout, I would suggest the following:

1)  Keep the gradient to 2% (1:50) or less,
2)  If you have the room, use a radius of 18" or greater,
3)  Use threaded rod to support the circuits of the helix as should the gradient prove a little too aggressive this allows for adjustment, and
4)  Finally, as track cleaning can be a little tricky, invest in a good track cleaning car.

The method I used to build my helices was by using straight sections of ply.  It was fairly involved but it saved on ply and I had the time.

Good luck.

Geoff

Offline woodbury22uk

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Re: Helix kits or design ideas
« Reply #7 on: October 24, 2018, 07:12:27 pm »
There is a slot for two Peco tracks in R2 and R3 (not sure if that is UK R2/R3, or the smaller continental R2/R3). For a 9 inch curve the ramp angle works out at 1 in 30.

http://le-forum-du-n.forumotions.net/t30582-impression-3d-rampe-helicoidale



From a later post today it is apparent that we are talking about Peco R2 for the inner circuit and R3 for the outer circuit, although the designer intends to use Peco code 55 Streamline. With the outer circuit as the rising grade the gradient is close to 1 in 39. A photo is shown of almost one complete turn, but waiting for the tapered initial ramp to go from the track on the lower baseboard to join the helix.
Mike

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Wondering how many pedants can dance of the head of a pin.


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Online AlexanderJesse

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Re: Helix kits or design ideas
« Reply #8 on: October 24, 2018, 07:30:52 pm »
If you have access to laser cuttter then in the german Stummiforum there are layouts for a simple to assemble helix. It uses steeper grade, but tests have been done showing that long trains could be moved up and down.

https://stummiforum.de/viewtopic.php?f=103&t=152354

The thread contains PDF's for Fleischmann (192mm) single track, Fleischmann R1 and R2 double track (3.3% down, 2.8% up), Peco (205mm/240mm) plus some 00-size helixes.
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