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Great Chesterford Junction
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 Posted: 4 Nov 2017 18:40
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Ron
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Congrats on POTW..:thumbup::thumbup:



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 Posted: 4 Nov 2017 20:37
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gormo
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Thanks Guys,

Now that`s a surprise......:thumbs:

http://www.click:tophat:Gormo



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 Posted: 4 Nov 2017 23:01
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Gary
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That tree has certainly blended the scenes together nicely. Top job Gormo. :thumbs::thumbs::thumbs::thumbs::thumbs:

Cheers, Gary.



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 Posted: 4 Nov 2017 23:27
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SMR CHRIS
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Another cracker from the Gormo Engineering department
:thumbs: congrats on POTW :thumbs:



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 Posted: 5 Nov 2017 00:36
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gormo
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Thanks Gary & Chris......:thumbs:
http://www.click:tophat:Gormo
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Last edited on 5 Nov 2017 00:37 by gormo



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 Posted: 5 Nov 2017 07:20
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Davoetype
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But when you see it on the actual layout it is even better!

Well deserved Gormo.

Cheers

Richard



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 Posted: 23 Nov 2017 12:06
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gormo
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G`day Folks,

I have turned my attention over the last couple of days to sorting out my turntable.

It`s the Dapol kit version which was built some time ago and it relies on track alignment by sight. It works reasonably well but occasionally I get the odd derailment due to misalignment of the tracks. There is a small amount of play in the gears which translates to too much sideways movement on the bridge.

Probably the logical solution, an index ring, would have been best tended to during the build, however that didn`t happen because I thought the visual alignment could handle the task.....oh well you live and learn.....:facepalm:

Time to go back to first principles.....how do they do it on the real thing.???....Well I found some interesting info on Google. The info seems to relate to American railways however the fundamentals would be the same for just about any railway. The turntables rely on the main bearing under the center of the bridge to carry the load. The little outrigger wheels that follow the ring of track in the well, are purely to help with vertical alignment. When a loco is evenly balanced on the center of the bridge ( the sweet spot ) the bridge can rock slightly showing that it is finely balanced and therefore reduces the load on the main bearing.

This is exactly how my turntable is set up.......blind luck got me that far. The outrigger wheels are pretty much just for show and have no role to play in supporting the load on the bridge on my model. The main bearing on my model carries the load.

The real turntables are aligned by eye and sometimes require a bit of backwards and forwards adjustment by the operator, to align the tracks correctly. Once they are aligned, they are locked in place with various latching set ups which vary from location to location. The latching is essential to stop sideways movement of the bridge whilst a loco is attempting to use it. The latch again is done by hand. It can be a simple steel bar that fits into correctly aligned slots or it can be any one of various sliding latches operated by a lever.

So the question arose....do I create a manual latching system operated by the hand of God..?????

Well seeing as the other alternative is a complete rebuild, the answer is Yes !!!!!

I decided to use 4mm Pop rivets to make the latches.... because I had them. The heads are filed off and the shafts are bent at one end to form the sliding latch. This one is not finished yet but gives an idea of how it works. The tubes are Super glued to the sleepers.






I use my magnetic uncoupling hook to raise the handle on the latch.




And then push it forward into another tube in the end of the bridge.





The cosmetics have to be sorted out yet, but that is the easy bit.





This is how they scrub up. I have used a little bit of rail as a back stop so that the latch doesn`t pull all the way out of the tubes. That would be annoying.





I think they look OK....not quite 100% prototypical but there you are..????...The prototype would have the latch mounted on the bridge. To save some grief I`ve mounted them on the sidings.





They still need some touch ups.....but as I say .....that`s part of the easy job.




So you must be wondering if it works..????.....well yes it does and to be honest it feels a bit like you are operating the real thing instead of doing it remotely via index rings and stepper motors and enough integrated circuits to build a computer.

There is a video to accompany this post and apologies for the shaky camera, but you will get the gist of how it performs.

Turntable Latching Demo



http://www.click:tophat:Gormo



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 Posted: 23 Nov 2017 20:51
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Toto
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Just the job Gormo ...... And no more derailments. :tophat:



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 Posted: 24 Nov 2017 04:27
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gormo
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Yes Toto,

That`s right......I mean they may look a little big.....not prototypical if you like.....even ugly to some...however.....now the turntable is bug free and ready to be used as it should be used.

It is also prototypical in it`s operation if you can excuse the hand of God.???

I have given it the speed test by locking down both ends on the straight through road and running a loco at speed over it. ........No issues.....that`ll do me...:thumbs:

To improve it further cosmetically would mean a complete re-build and I`d rather not do that. The other alternative is to buy a commercial product which would blow the budget by a long way.....so here I stay with my AU$20.00 turntable....warts and all for the moment.

Some time in the future I may consider a scratch build......but that is just an idea at the moment and probably will stay an idea.:scratchchin:

http://www.click:tophat:Gormo






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 Posted: 24 Nov 2017 12:25
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gormo
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OK Folks,

A couple of new ( old ) arrivals over the last couple of days. I`ve been shopping down at thE bay again and got a couple of bargains.

A 20 ton brake van from Dapol in beautiful condition and free running and a Match Truck and container from Mainline also in beautiful condition.









They just need the small coupling conversion to bring them right up to date.

Now a couple of atmospheric pics taken whilst out there in the shed taking the wagon pics.

















http://www.click:tophat:Gormo

Last edited on 25 Nov 2017 23:24 by gormo



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 Posted: 24 Nov 2017 17:11
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Ron
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Very nice and atmospheric! :thumbup:



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 Posted: 25 Nov 2017 23:23
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gormo
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Thanks Ron......:thumbs:
http://www.click:tophat:Gormo



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 Posted: 26 Nov 2017 00:28
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Gary
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Nice addition to the fleet Gormo and some great pics of the layout. :thumbs::thumbs::thumbs:

Cheers, Gary.



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 Posted: 26 Nov 2017 07:42
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Toto
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Nice shots Gormo. The wagons look in mint condition. :thumbs:



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 Posted: 7 Dec 2017 11:29
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gormo
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G`day Folks,

Back into the area behind the station finally.

The polystyrene base for the scenery has been given a skin of plaster just on the areas that have been contoured and now today, I`m laying down the road surfaces for the lower level.




I am just using wet & dry paper for the roads and roughing it up a bit as I go along.





The road is fixed down with PVA and I use pins to secure it until the glue dries. The wet & dry paper tends to want to curl up on the edges, so sometimes I use the pins and sometimes I use weights to keep it in place.





There was also a small section near where I left off last time that needed the plaster treatment as well.





The end of the section here and also the end of the lift out section, are painted dark brown so that if the two sections separate slightly, you won`t be presented with a little section of white poking through.

 


Once we start adding retaining walls and grass and foliage, these areas will take on a softened appearance.

You may have noticed that I still need to paint the last section of rail there in the end of the bay platform. That will happen once the ballast next to the track is completed ( it`s drying as we speak ). It`s part of the lift out section.

So there we are folks.......I`ve packed it in for the day.

http://www.click:tophat:Gormo




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