A stream for the Elderbury & District Light Railway

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ge_rik
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Re: A stream for the Elderbury & District Light Railway

Post by ge_rik » Sun Sep 16, 2018 10:57 am

Blimey, that's well engineered. Is your middle name Bazzalgette?

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Re: A stream for the Elderbury & District Light Railway

Post by IanC » Sun Sep 16, 2018 11:48 am

ge_rik wrote:
Sun Sep 16, 2018 10:57 am
Blimey, that's well engineered. Is your middle name Bazzalgette?

Rik
I agree. Interesting engineering. Far more ambitious than my Heath Robinson solution would be.
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Re: A stream for the Elderbury & District Light Railway

Post by philipy » Sun Sep 16, 2018 2:00 pm

Thanks for all the nice comments chaps. Rik's gave both of us a laugh!
Peter Butler wrote:
Sat Sep 15, 2018 8:23 pm
I can't imagine how you came up with the design.
Peter,
Like most of my idea's/projects it just sort of growed.

I was contemplating some sort of clip to hold the 38mm ID flexible supply pipe to the top of the tray edge and wondering if I could print something, but in the back of my mind I thought that a 38mm (44mm inclding wall thickness) lump would be too difficult to disguise, so I started wondering about going to a flatter but wider profile with the same cross-sectional area to avoid throttling the flow.

Before getting too complicated a design, I started to think about how it could be drawn. The Sketchup drawing program has a tool called "Follow Me" which I have used a number of times previously for producing things like chamfers. Basically if you draw, say, a diagonal across a corner, highlight the adjacent edge and click "follow me" it automatically runs the triangle to the end of the highlighted line, which can be any shape, like round a door frame for example and you get a chamfered edge to the frame. Well, I had a brainwave at this point, but tested it with something fairly simple. I drew two concentric circles, 3mm apart and removed the centre to give the end of a tube with an external diameter of 38mm. I then drew a line from the outer edge at right angles 150mm long, added a 90deg curve to the end and drew another straight line from the end of the curve. So far so good, but nothing I haven't done before, so now for the bright idea. I highlighted the three lines, hit "Follow Me" and clicked on the face of the tube end, and in a split second it did just that, and I had a hollow tube with a bend in the centre! I then used "Follow me" three more times round the circumference of the pipe to produce the triangular barbs to grip and stop the flexible tube. Finally, because it is easier to print without overhangs, I split it lengthways so eventually I will print 2 open half-tubes, which is the first drawing above.

Following that, I worked out the dimensions of the flattened tube to hook over the tray edge and drew the shape as a long rectangle with one inner curved end and one flat end. I then drew the adjacent lines, similar to the first pipe( different dims obviously), hit F-Me again and got the hollow hooked shape. This was then copied and mirror-imaged so that when glued together flt-to-flat, I will have the area to cope with the same volume - actually I rounded it up slightly to make some notional allowance for friction flow losses in the narrowed pipe.

All I now needed was a piece of pipe, which I'm calling a manifold for want of a better term, with a long thin hole in one side and a fitting to take the two hook pieces. This was drawn using similar techniques.

I hope all that makes some sense if anyone has been daft enough to try reading it! :scratch:

Tom,
I shall print it in ABS and use Plasticweld to stick it all together.

Finally, SWMBO says I ought to point out that I've been doing this whilst sitting near the pool in our hotel overooking the Nile in Luxor! (Sorry !)

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Re: A stream for the Elderbury & District Light Railway

Post by Peter Butler » Sun Sep 16, 2018 4:57 pm

Now it makes sense.... I bet there is a hieroglyph somewhere in Luxor which has inspired you!
Thinking about water flow and distribution it does allow a wider spread of water volume than a simple outlet pipe thus reducing pressure and a jet-like exit from the supply. I think you have found the perfect solution there.
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Re: A stream for the Elderbury & District Light Railway

Post by Lonsdaler » Mon Sep 17, 2018 9:28 am

philipy wrote:
Sun Sep 16, 2018 2:00 pm
Thanks for all the nice comments chaps. Rik's gave both of us a laugh!

...Before getting too complicated a design, I started to think about how it could be drawn. The Sketchup drawing program has a tool called "Follow Me" which I ...click "follow me" ... hit "Follow Me" ... used "Follow me" ...three more times round the circumference of the ... pool in our hotel overooking the Nile in Luxor! (Sorry !)
Have I got that right? :lol: :lol: :lol:

Have a relaxing holiday Mr and Mrs Philipy - the last time I went to Luxor it rained - the first time in 5 years, apparently :roll: I'm just lucky like that :mrgreen:
Phil

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Re: A stream for the Elderbury & District Light Railway

Post by IanC » Mon Sep 17, 2018 10:53 am

Enjoy Luxor. I have fond memories of Luxor. I took my daughter there as part of her 18th birthday present. on her birthday she went into Tutankhamun's tomb. Would love to go back again. So much to see.
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Re: A stream for the Elderbury & District Light Railway

Post by philipy » Mon Sep 17, 2018 12:30 pm

Phil, we were here at the beginning of May this year and had several days of intermittent rain. It was cold too, we didn't go near the pool for about a week, then suddenly it all cleared up.
About 2 years ago we were down in Aswan and had a torrential thunderstorm, the first they had seen for about 20 years. The locals didn't know what to do!

Ian, yes there is loads to see, although we've been so often that there isn't much we haven't seen now. Don't know when you were here but it is very quiet now, hardly any tourists and the local economy is badly hit. UK TUI and Thos Cook no longer fly here so the only way is by Egyptair from Heathrow

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Re: A stream for the Elderbury & District Light Railway

Post by IanC » Mon Sep 17, 2018 2:56 pm

We went in November 2005. The weather was hot, in the 90s with no sign of rain! The locals were wearing two or three layers of clothes complaining it was cold! I've heard reports that the tourists are staying away because of the unrest. I suspect that's why we are getting reports of new findings in a bid to attract the tourists back. We got on really well with some of the locals to the extent that we were invited to their home to see the real Egypt. I don't think anyone who hasn't been can appreciate the scale of some of the buildings and temples.
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Re: A stream for the Elderbury & District Light Railway

Post by philipy » Mon Sep 17, 2018 3:21 pm

IanC wrote:
Mon Sep 17, 2018 2:56 pm
I've heard reports that the tourists are staying away because of the unrest.
Exactly and that is so wrong and so sad. A maniac with a bomb, a knife or a car can kill you just as easily in Manchester, London, Paris, Berlin or the south of France, as here. There are more police here ( all armed) just in Luxor, mostly looking bored, as there are probably in most whole English counties.
One of the felucca ( sailing boat) 'captains' touting for business stopped us as we passed him for a 2nd time and simply said "You tell everyone to come back, tell them it is safe here" and he is absolutely right. My wife says she would rather walk down the street alone at night here than she would most places back home.

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Re: A stream for the Elderbury & District Light Railway

Post by IanC » Mon Sep 17, 2018 8:03 pm

It is tragic. Egypt has so much to offer and the locals are no less friendly than anywhere else in the world. The police where everywhere at the time of our visit. They were armed too. If was two brothers who had one of the Fellucas named Maggie Moon that acted as unofficial guides for us and showed us much of Egypt. They were incredibly helpful and bought us gifts to bring home. I would have no hesitation in returning if the opportunity arose.
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Re: A stream for the Elderbury & District Light Railway

Post by philipy » Fri Sep 21, 2018 6:36 am

As I said a couple of days ago, most of my projects just 'growed', and a small sub-project has just done exactly that over the last couple of days.
Following a brief exchange on Phil's (Lonsdaler) thread about his bridge refurbishment, I was using Sketchup to play with designs for a concrete 'stone' bridge. These were little more than concept doodles since I don't have any actual data with me, other than the nominal width of the concrete track bed, and a photo. Nevertheless I came up with a design that looked about right and which I rather liked. So far so good.
Now, previously I've only ever used Sketchup for producing the drawings for my 3D printing, and although I know it has the ability to cope with really complex stuff, I've never had the need/drive to investigate and learn what it can really do. I started by simply colouring the bridge stonework to see how it might look, and things kinda went from there, to .......
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----------> here!



https://youtu.be/QVliq2-lIyI

The slight jerkiness is due to the stop-frame scene animation in SU and I haven't found a way round that, sorry. The sharp eyed amongst you may also spot one or two holes in the ground, sorry about that as well! The rocks etc are only intended as a general indication, not actually the way it will be in reality, and the plain triangles represent where mortar gap filling might be used.

Anyway, any thoughts for improving the bridge itself will be gratefully received, although as it stands I think I know how I can cast it in concree, in situ and in one piece, so please don't suggest too many fancy mouldings, etc! However I am hoping to colour the concrete to this sort of colour but the stonework will be 'rougher' cut.

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Re: A stream for the Elderbury & District Light Railway

Post by Peter Butler » Fri Sep 21, 2018 9:06 am

I never realised Egypt was such a boring place to visit with nothing to do except doodle on laptops! On the other hand it is clearly inspirational and brought out the creative spirit in you Philip. I like the look of the bridge design and how it sits in your virtual landscape.
Thinking 'outside the box' as I do, I could see a garden railway with elaborate Egyptian steam locomotives and stock running through a desert landscape with ancient structures in the background. A feeder line with industrial equipment carefully transporting artifacts from excavations to warehouse full of crated items waiting for export
Just think of the scenic structural possibilities.
Perhaps its me?????
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Re: A stream for the Elderbury & District Light Railway

Post by IanC » Fri Sep 21, 2018 11:32 am

Peter Butler wrote:
Fri Sep 21, 2018 9:06 am
I never realised Egypt was such a boring place to visit with nothing to do except doodle on laptops! On the other hand it is clearly inspirational and brought out the creative spirit in you Philip. I like the look of the bridge design and how it sits in your virtual landscape.
Thinking 'outside the box' as I do, I could see a garden railway with elaborate Egyptian steam locomotives and stock running through a desert landscape with ancient structures in the background. A feeder line with industrial equipment carefully transporting artifacts from excavations to warehouse full of crated items waiting for export
Just think of the scenic structural possibilities.
Perhaps its me?????
No Peter, not just you. I'd like to incorporate a small area to include some Egyptian features. I was planning on naming a station phebes, the original name for Luxor.

I like the idea for your bridge Phil.
Ian

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Re: A stream for the Elderbury & District Light Railway

Post by ge_rik » Fri Sep 21, 2018 2:11 pm

You could always base it on the Egyptian Delta Light Railway - https://en.wikipedia.org/wiki/Egyptian_ ... t_Railways
Some really interesting prototypes on there
Egyptian_Delta_Light_Railways_-_Sentinel_Steam_tractor_No_202_enters_Barrage_station.jpg
Source: Wikipedia Commons
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Re: A stream for the Elderbury & District Light Railway

Post by philipy » Fri Sep 21, 2018 3:01 pm

Just wondering how much SRB would be needed to hold the Sahara in place?

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