A new turntable for Sandstone

gregh

electronics, computers and scratchbuilding
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Way back in 1995, I built my first turntable at a station then called Ghost Gum. (Later I changed its name to Sandstone.)  It was a concrete base with an aluminium rail for providing power to the rails on the turntable. It was manually turned.  I even provided water drainage from the centre!
These 2 pics show it from each direction. The station is on a raised garden bed about 2’ high.
1  view6.jpg

2  ggenter.JPG

And this is a closeup
3  big3tt.jpg


BUT I made a big mistake.  The turntable connected directly to the platform road (because there was no other option). This meant that I could not use the TT when the platform was occupied.  And the TT was hard to reach, being at the back.

I tried a solution of moving the station platform to the front as shown in this pic. (The name changed to Sandstone here too, when I finally named the line).

4  aerial sandstone.jpg

But I didn’t like the station at the front – you couldn’t see the building detail and I had to reach over it to get to the sidings for shunting.  (I have long since decided that “buildings at back, sidings at front’ is my standard)

So when I built the new station building it went back to the back, with the same TT access problems. You can just see the TT in these two pics from opposite directions
5  100_5067.JPG

6  sandsturnout.JPG

But I finally decided the TT had to go and I just covered it up and built a goods shed on the site.
7  IMG_2857.JPG

BUT I STILL NEED A TURNTABLE as it is a terminal station and I still like running steam tender locos.

So I’ve decided to build an ‘extension’ at the front of the raised garden. (shown in khaki)
Here’s the area and a plan.

8 TT  location.JPG

9 sandstpossibleTTat right.GIF

Ideally I’d like the TT access track to come off the mainline to the right of the plan to make access really easy  - purple dot on plan. That way the TT access would never be blocked by standing/shunting trains. (It may not be prototypical, but would be easiest for operating MY railway.)  But just not possible – that’s a ramp/path on the right. So I’ll lay a new siding in front to lead to the TT, so that I still have most of the existing siding length.  This requires a 15cm wide extension at the front of the existing baseboard.


First, I built the TT bridge to determine the height from the TT base to rail (55mm  -0/+3mm ). The TT bridge is a couple of bits of 2”x2” plastic angle and 50mm square wood,  running on nylon wheels  with a  3/8”  pivot. Nothing fancy – just practical,  and no track power needed

I decided to make the TT base from (suspended ) concrete – the TT is adjacent to the ramp/path just at the right height for my grandsons to step onto.  So I want it strong. I had some corrugated fiberglass roofing lying around so used it as the base for the concrete.  I haven’t decided whether to put reinforcing in or not.  Here’s the ‘box’ ready for the concrete, with the bridge temporarily in place for checking.
10 ready for conc.JPG


to be continued.....

 
Excellent! I love a good cliffhanger and now I am desperate for the next episode!! :D
 
I like your solution... I wonder how many blokes here have had to do major re-surgery to "get it right"? I certainly have. Sometimes it looks good on paper.....but....

Great layout; would love to see more progress piccies....
 
Would suggest some reinforcing Gregh, just in case the Grandes do use the new TT as a Stepping Stone. Glad I do not have to consider these on my line being all Tank Engines. They do take up a fair bit of space. Looking forward to the next instalment.
JonD
 
chris beckett said:
I like your solution... I wonder how many blokes here have had to do major re-surgery to "get it right"? I certainly have. Sometimes it looks good on paper.....but....

Great layout; would love to see more progress piccies....


More of us than we care to admit. But then again, trial and error, in our little world does replicate what goes on in the big train world. See how many of those engineers would care to admit it.
 
continuing the saga....

So being Mr Cheapskate, I waited till we had our screen door replaced and used the diamond steel mesh from it as reinforcing. 
reo s.jpg

While trying to be patient till the concrete set, I made the wheels by filing off the flanges from some old plastic wagon wheels.
wheels.jpg

side wheels.jpg


And here’s the final slab. I set pieces of black styrene in at the locations where the tracks meet for the wheels to rest on (in case the conc wears away).  I put in a drain hole near the centre and finished the inner part with a wooden float to give a rough finish and the `track` where the wheels run with a steel float for smooooth.  It seems to have worked.
conc done s.jpg


I made a new turnout and laid the approach track, and amazingly the heights all matched up.
newturnout s.jpg


TT track s.jpg

I hadn’t considered making walls for a pit, but realised there was nothing to stop a loco running off the TT and falling to the ground.  So I started cutting some 50mm Hebel to form the pit walls. Still haven’t decided whether they will extend all the way around.  I`ll then need a 1-2 cm high  `fence` or bank or something, to stop the loco wheels, as the 50mm is exactly at rail height!
Looking for ideas please.
1st test.jpg

So far, so good.
To be continued again...
 
If there's room, you could put a short spur with a buffer stop directly opposite the other track. I'd imagine this would be the most likely route for accidents (eg mistaking the direction the loco is facing when starting off - mistaking stop for go on the tx - etc). A rail-built or even a hebel brick built buffer stop might also resist accidental footfall off the path, whereas a fence might be vulnerable. ;D

Rik
 
Always a pleasure to read and look at ;D
 
Simple but effective. I like simple. I may copy some of your ideas for my own turntable, yet to come, I hope.
 
Madman said:
Simple but effective. I like simple. I may copy some of your ideas for my own turntable, yet to come, I hope.
Thanks Dan. When I started G scale I tried to do good realistic models. But I soon realised that fine scale doesn't work outdoors. Now my approach is to be sure it works and 'looks something like the real thing'.
 
My sentiments, exactly, Greg. I started the same way, with my garden railway and went through the same process of de-detailing, until I arrived at a point I was confident that I could maintain it and not get frustrated. I don't want to sidetrack your topic. Looking forward to your next installment.
 
In the last exciting episode, you`ll remember I had made ‘walls’ for the turntable pit from 2” Hebel. This was almost another major mistake. Luckily I hadn’t concreted them in, because next morning there were leaves in the pit.  Surprise, surprise!!    So I thought the leaf blower will fix them.  But it was quite difficult getting them to blow out and I blew loose ballast into the pit as well.
So plan B  says the walls will not be continuous as shown in this pic.  I can turn the TT bridge about 90 degrees from where it is shown and use the leaf blower from the right.  (or even manually using a brush !).
halfwalls2.JPG


 
Looking good Greg
Really must investigate our equivalent to Hebel. That scribed stonework looks really good

Rik
 
I had used a type of "Celcon" block for the innards of my 1:1 footbridge and retaining walls outside, but it never occurred to me to scribe them for modelling purposes. Great thinking, Sir! I am just disappointed that my quantity surveying was so fine that I have none left over, to give it a try.
 
ViaEstrecha said:
I had used a type of "Celcon" block for the innards of my 1:1 footbridge and retaining walls outside, but it never occurred to me to scribe them for modelling purposes. Great thinking, Sir! I am just disappointed that my quantity surveying was so fine that I have none left over, to give it a try.
Hebel ( aka Thermalite? aka Celcon? ) is the greatest outdoor modelling material ever.

My website might give you more ideas...
http://www.members.optusnet.com.au/satr/hebel.htm
 
Just about all complete now.
test1.jpg

A buffer and some fences installed.
test2.jpg


One problem is that I can no longer easily reach the turnout directly above the TT in the . So I used a linkage and a piece of piano wire.  I wait for it to get jammed by bits of ballast!
linkage.jpg
 
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