g scale helix...anyone built one into their layouts?

djrobot

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hi anyone want to share their experiences, pictures or videos of building a helix on g scale layouts? would be great to see what people have built as I'm going to take my dubious 'oo' skills and apply them in my garden to change levels in restricted space ;-]
 
yeah I'm going to incorporate the helix ( 630 degree...1 and 3/4 circles of 10' diameter ) into a rockery with sections exposed and sections in tunnels...gonna use black limestone and dwarf conifers to give an alpine feel. my inspiration is marias pass .
i will post a progress thread in the appropriate place...its just in design and measuring phase but thats almost done as of today .
i need to have a 1' difference in height and the helix will be where it happens ;-]
 
I remember seeing kentKeith's photos of his spiral here, as well as others.

https://www.gscalecentral.net/track-track-laying/spirals/msg229850/#msg229850
 
All the time that I have been running trains on my layout, I have been battling the 10% (1:10) gradient that tis my garden topography. It was impractical to raise the line were it runs near the house to balance that at the back of the garden as it would have caused a real problem with access etc etc
2 angle of gradient.jpg


So...I have had to use other methods to overcome the challenges that single locos have when trying to climb the slope with a train in tow:

[size=14pt]Geared locos like Shays and Climaxes did not have a real problem but were doubled up for a heavy log consists[/size]
2 shays.jpg




[size=14pt]Other locos were double, triple and even quad headed to be able to pull long strings of cars, especially heavy aluminium streamliner cars.[/size]
gp 38 head on smoke and dust copy.jpg


[size=14pt]Another solution was to make freight and passenger cars with hidden motorised bogies.
Here, three `motorised` stock cars are ready to `blend in` with other non motorised ones.[/size]
three ready to push the loco.jpg


[size=14pt]The most recent method was to construct a helix (max 6ft wide) when I had a cleared space from the removal of a few large bushes.[/size]
new loop show tunnel exit and bridge with under pass.jpg

local train under brifge with part of coaling.jpg


 
ntpntpntp said:
I remember seeing kentKeith's photos of his spiral here, as well as others.

https://www.gscalecentral.net/track-track-laying/spirals/msg229850/#msg229850

thanks Keiths pics are indeed inspirational...but i think his diameter is more than i can manage...10' or 11' max i think. i will be using the USA stock and locos and the layout is going to be digital so double heading will be a regular thing ;-]
thanks for the info guys and keep it coming ;-] cheers Rob
 
My friend in Crete has a really nice spiral, probably 3-4m diameter, climbing around 400mm..maybe more.

See a vid here....[youtube]http://www.youtube.com/watch?v=nt6qjltT2hA[/youtube]
Which will hopefully lead to more vids of Kretabahn
 
Very nice, very Berninabahn without the Overhead. Lovely.
JonD
 
this is my spiral
1:33, about 12' diam gains about a foot at the vuaduct

https://www.youtube.com/watch?v=TzHXrT61EI4
 
[quote author=3Valve link=topic=300116.msg334399#msg334399 date=1417441030]
Have a cunning plan for a helix at the moment.  Just accumulating the required track.
[/quote]

Cunning plan will go something like

From this: -

Layout_now.jpg

To This: -

Newlayout_planned.jpg
 
Lovely plan, but not sure it classes as a Helix. More of a Doubled Dog bone. My line has a plan similar to this but at both sides of the Garden with a Branch leading up beside the House on one side. I certainly do not class mine as being a or having a Helix.
JonD
 
[quote author=3Valve link=topic=300116.msg334548#msg334548 date=1417553112]
Ah OK, what is a helix then? I`ve obviously misunderstood.
[/quote]

Hang on I think I may have sussed it.

Spiral

spiral.jpg

Helix

helix.jpg

Is that about right?  I honestly don`t know.  Someone please put me out of my misery  :D :D
 
I think you need to leave in the same direction you arrived at a helix gareth
 
er. yes. you beat me to it.
 
A Helix is:

an object having a three-dimensional shape like that of a wire wound uniformly in a single layer around a cylinder or cone, as in a corkscrew or spiral staircase

A Spiral is:

winding in a continuous and gradually widening (or tightening) curve, either around a central point on a flat plane or about an axis so as to form a cone

The main differences is the radius of the curve, the radius of a helix is constant, the radius of a spiral increases or decreases.
 
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