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Re: Outer Melbourne

Posted: Thu Jul 18, 2019 9:34 am
by Nutter
looking good

Re: Outer Melbourne

Posted: Fri Jul 19, 2019 1:10 pm
by martink
A basic set of three trains for this layout is now complete. They cover two of the main types of suburban stock in service in Melbourne around 1980. If there is time before its first exhibition in late August, I may see about building an example of the third type as well, the one that was starting to replace them. As usual, the models are 3D printed and hand painted, with decals for the gold lining and Eishindo pantographs. The video shows them running on Monbulk Creek for a bush setting, as there are still spots on the network that look much like that.

https://youtu.be/gzXDuVlWTtA

Re: Outer Melbourne

Posted: Sat Jul 20, 2019 11:48 am
by msimister
They look convincing Martin. Great stuff

Re: Outer Melbourne

Posted: Fri Jul 26, 2019 6:20 pm
by martink
One major problem that had to be solved for this type of layout was how to make the artwork for the rail and road track surfaces. The linear motor track needs to have a paper surface in order to make it look like a railway or roadway, as well as to give a smooth running surface. Matching dummy tracks and roads also need to be made, purely for scenic purposes, all with a fair amount of detail. Making realistic roads is also an issue for conventional T layouts.

The rail surface for Monbulk Creek was generated using Anyrail's 3D mode, and while this worked OK it took a fair amount of fiddly hand editing and doesn't easily scale to more complex layouts. Similarly, the short stretch of main road under the bridge was drawn up using GIMP. Again, while this did work, it was a painful process.

So, for the new layout, I adopted my traditional solution to this sort of problem: design a simple computer language to define the road network, then write a program to implement it, then write the control scripts to generate the graphics.

After a long days' work, here are some of the key road pieces and some sample rail pieces. When printed on A4 paper, all are correctly scaled for T. The rail side is 5'3" broad gauge with correct sleeper sizing and spacing, but no frogs as yet. So, not quite finished, but close!
mel-road1.jpg
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test.jpg
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Re: Outer Melbourne

Posted: Mon Jul 29, 2019 12:23 pm
by martink
That nerve-racking step when the layout gets turned over and shaken to get rid of the excess scatter has now been performed, and things are looking pretty as hoped for. And it still runs. Now to start filling in the details...
DSCI0006.JPG
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DSCI0005.JPG
DSCI0005.JPG (649.93 KiB) Viewed 604 times

Re: Outer Melbourne

Posted: Mon Jul 29, 2019 9:15 pm
by Nutter
Martin can you show how you sorted the magnets to drive the road vehicles.

Re: Outer Melbourne

Posted: Tue Jul 30, 2019 12:59 am
by martink
Nutter wrote:Martin can you show how you sorted the magnets to drive the road vehicles.
Not quite sure what you mean by that question. A literal answer would be a pic or video of me moving a stick of 3 Ø x 2 mm magnets to one side of the table for use in most models, and the thinner 3 Ø x 1 mm ones to the other side. I am pretty confident that isn't what you are asking for. :)

I have one old thread that went into a bit of detail that might be more to the point:
viewtopic.php?f=10&t=130&start=10

Re: Outer Melbourne

Posted: Tue Jul 30, 2019 9:23 am
by Nutter
martink wrote: I have one old thread that went into a bit of detail that might be more to the point:
viewtopic.php?f=10&t=130&start=10
Thanks for the link, That covered exactly what I wanted to know :roll: even more embarassing it was me discussing it with you back then.

Re: Outer Melbourne

Posted: Thu Aug 22, 2019 8:35 am
by martink
It is finished at last! Well, almost - there are still a few rough edges and some chickens that have come home to roost. It is, however, ready for its first exhibition (Caulfield, Melbourne, Australia) this weekend. I'll deal with what shortcomings I can after the show, then freeze its state so that I can get started on #3.


Re: Outer Melbourne

Posted: Thu Aug 22, 2019 9:50 am
by dkightley
Brilliant, Martin....

And good luck for the weekend.




PS I've embedded the video using the YouTube tag. It looks better that way!

Re: Outer Melbourne

Posted: Sat Aug 24, 2019 8:18 am
by msimister
Saw Martin's two linear motor layouts this morning at the Australian Model Railway Association exhibition at Caulfield Racecourse in Melbourne. Very impressive, especially 'Outer Melbourne' with the working road/rail level crossing with working half-barriers. If linear motors can be commercialised for 1/450th scale it will answer a lot of problems (especially points and cost) although double track will be an issue.

Congrats Martin. Looking forward to your next linear motor layout.

Re: Outer Melbourne

Posted: Mon Aug 26, 2019 4:25 pm
by DanMacK
This is brilliant on soo many levels and is amazing in any scale. Would rolling wheels be an option? Especially on the vehicles? Fiddly... but might add that last little bit of realism? Although at that size it's hardly noticable. Beautiful layout!

Re: Outer Melbourne

Posted: Tue Aug 27, 2019 12:41 am
by martink
DanMacK wrote:Would rolling wheels be an option?
It would be doable in larger scales, but still not easy, and would certainly come at a price. There would need to be enough contact between the wheels and track to provide the force to turn them, which means more friction. There would be wear issues with the wheels and track. There would be a tiny air gap between the track and magnets which reduces the drive power. The axle positioning would likely conflict with where the magnets need to be, so that less stable axle-less wheels would be needed. The system generates a fair bit of fore-and-aft drive force, but only weak side forces to keep the vehicles on the track, so that any asymmetry between the wheels would send the vehicles careering off course, and getting around tight corners would be challenging.

Things might be made easier by adding actual some sort of (slightly) raised guide rails to the track - plastic, brass wire, even just another layer of paper, but that opens up a whole new box of complications.

Anyway, all of that is part of why I am sticking to the tiny scales where the lack of wheels can be concealed.