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Ratio Viaduct Kit construction - On Members Workbenches. - More Practical Help - Your Model Railway Club
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 Posted: Mon Aug 16th, 2010 07:09 pm
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algil
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Hi Rick, Just came across your very descriptive and amusing text on the viaduct in my scrolling. I was thinking of a viaduct when I start building my layout, but will probably now settle for a girder bridge! Loved the ECC tanks, was the weathering yours? Please forgive if has already been described, as being a newbie, I am still still scrolling through the masses of informaion on this site

Rgds Alan.

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 Posted: Mon Aug 16th, 2010 10:18 pm
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Gwiwer
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Hi Alan. The weathering is superb but is not my own. The tanks were released by Dapol earlier this year as a special commission. Although they sold out extremely fast a further run of near-identical ones is due any time.

If you're interested get in quickly!

http://www.kernowmodelrailcentre.com/category/621/OO_Gauge

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 Posted: Tue Aug 17th, 2010 12:06 pm
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algil
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Thanks for the info Rick.The tanks will not really suit what I am planning, my comment was aimed more at the weathering job than the vehicle!

Rgds, Alan

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 Posted: Fri Aug 20th, 2010 06:32 am
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Gwiwer
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The land has been formed at both ends and the plasterwork moulded to create the muddy river bed beneath.

Land which is to be covered in greenery I always paint green first; my preferred shade not being available on a recent visit to the store I am using odds and ends to hand. The river bed has received two coats of Woodland Scenics Earth Undercoat and Burnt Umber mixed 50:50 and the first "vegetation" has also been glued to the land.



To achieve even cover without excessive mess or waste I up-ended the scene to apply ground cover to the steep ends with them almost horizontal. These were covered in undiluted PVA, brushed evenly over the entire area, and sprinkled with Woodland Scenics coarse turf in "Earth" "Light Green" and "Dark Green" colours added randomly but using the rough proportion of 20:70:10. The cover was lightly pressed into the glue to give better bonding.



Next the first of many applications of Woodland Scenics "Fine Leaf Foliage" has created the first real tree and shrub effects. These need to be built up in layers of varying colours and textures so may take some time to complete.



And finally the view up under the end arch. This now looks more believable in being sprung from the hillside and the first trees, shown above, are also just discernible here as well.



Lots to do but it is starting to come to life.

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 Posted: Fri Aug 20th, 2010 06:59 am
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Sol
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Coming on very good indeed Rick.

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 Posted: Fri Aug 20th, 2010 08:22 am
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Marty
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Yup, starting to look really good.



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 Posted: Fri Aug 20th, 2010 08:40 am
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MaxSouthOz
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Master Modeller :exclam :exclam 



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 Posted: Sat Aug 28th, 2010 06:54 am
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Gwiwer
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And this is the stage at which the project has to be left for a month while I travel overseas.

Something to do with a little train show in Cornwall, apparently. :thumbs:mutley

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 Posted: Sat Aug 28th, 2010 07:47 am
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Wheeltapper
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Thats an awefull lot of work you have put into this project but its been well worth it as the results are already  showing .

Will be looking forward to further progress when you get back from your trip to Cornwall for some show or other .

Totally off topic but did you see the news about the village of Beer ? Apparrently scientists have found the answer for growing life sustaining matter in space in the rocks of Beer cliffs and samples of these hae been under test in space for some time where it has found that absolutely nothing will destroy them .

 



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 Posted: Sat Aug 28th, 2010 07:57 am
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georgejacksongenius
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Love that second shot under the arches looking up! The vegetation looks really convincing.Proper job,Rick!
:pathead
Cheers,John.B.:thumbs

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 Posted: Sat Oct 16th, 2010 10:19 am
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Gwiwer
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Still "growing" more vegetation day by day .....



The trick here is to get it to look nice and thick without overdoing it.

The capping stone pieces have also been stuck on. Here is the latest view through the arch. I am hoping to have this scene ready to fit within the next month.

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 Posted: Sat Oct 16th, 2010 10:29 am
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phill
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Just caught up with this thread and i am well impressed Rick. Love the arch and the way the vegitation is blened in to the arch. Great job mate. You know as this a a masterfull bit of work i reckon you must of been a GWR engineer in your past life :thumbs

Phill

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 Posted: Sat Oct 16th, 2010 10:40 am
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Bod
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Hi Rick. This is looking very good.

Does it mention enything in the instructions about using this kit to produce a curved viaduct, or do you think that after your trials and tribulations this will be a step too far?

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 Posted: Sat Oct 16th, 2010 11:02 am
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Gwiwer
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At an early stage I had hoped to use the kit to create a viaduct which took a slight curve by angling the five arches against each other slightly.

This would have involved quite a fair amount of "cut and shut" adaptation of the plastic panels as well as the insertion of skewed brick inserts to the arches, wider on one side than the other.

I dare say it could be done but given the time available to me and the need to consider this as part of the whole layout (it is under a metre long on a run of over 30 metres which means I have a lot more layout to maintain and clean as well) I felt it was not practicable this time to attempt the curved structure.

If you wanted to build a viaduct on a smooth curve as opposed to using straight segments angled to form the curve you would need to also somehow bend the many sections of the kit which may not be successful.

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 Posted: Sat Oct 16th, 2010 12:19 pm
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Bod
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Thanks Rick.
I guess its back to the card and scribed Das clay.

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 Posted: Sat Oct 16th, 2010 03:53 pm
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Michael Thornberry
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Hello Rick,
So glad you found the time to re-model the Viaduct. A very fulsome and excellent written description of the modelling techniques, mate, and the problems and your solutions thereof were very enlightening. Many Thanks indeed,
Kind Regards,
Michael Thornberry.

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 Posted: Sat Oct 16th, 2010 04:42 pm
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John Dew
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Hi Rick

  As you may know, separated by thousands of miles, we have been pursuing the same project albeit using different Kits and in a different locale Ratio: Countryside......Langley: Industrial.

I am very impressed at the way you solved the curved arch infil......much better than I achieved! Also I particularly liked the way the ends embedded into the hillside.......very lifelike.......that is a challenge I still have to face and you have given me some neat ideas....thank you:thumbs

Bod wrote:

Hi Rick. This is looking very good.

Does it mention enything in the instructions about using this kit to produce a curved viaduct, or do you think that after your trials and tribulations this will be a step too far?

Gwiwer wrote:
At an early stage I had hoped to use the kit to create a viaduct which took a slight curve by angling the five arches against each other slightly.

This would have involved quite a fair amount of "cut and shut" adaptation of the plastic panels as well as the insertion of skewed brick inserts to the arches, wider on one side than the other.

If you wanted to build a viaduct on a smooth curve as opposed to using straight segments angled to form the curve you would need to also somehow bend the many sections of the kit which may not be successful.

Hi Bod

My viaduct on Granby is curved and you can read about my trials and tribulations at http://yourmodelrailway.net/view_topic.php?id=5500&forum_id=21&page=8

The skew effect created by the curve (36" radius) was far more marked than I anticipated and caused a lot of head aches..... fortunately in an Industrial Setting the worst excesses can be concealed......they would be more apparent in open countryside. The Langley Kit is a thin Plastic Extrusion and is far more flexible than Wills Ratio (It has compensating disadvantages:sad:)

I agree with Rick a curved Viaduct using just the Ratio Kit would be major undertaking and not for the fainthearted. If I were doing it again (which I wont!)  I think I would use a combination of Kits

Regards 

 



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 Posted: Sat Oct 16th, 2010 04:49 pm
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Kevr
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 Good looking viaduct there Rick, and the ground cover is really impressive :doublethumb



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 Posted: Sat Oct 16th, 2010 04:58 pm
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Bod
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Thanks John, on my way there now.

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 Posted: Fri Nov 5th, 2010 11:56 am
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Gwiwer
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After several attempts I have finally reached the point where I am happy enough with the river bed to move on.

The problems have arisen when plaster which is mixed to a consistency where it will go off rather than just flake and crumble has not then been workable to a good and believable smooth mud surface.

I have tried sanding back lightly with not a lot of success but finally got one batch to both pour well and go off. Some of the difficulties probably relate to the temperature and humidity on the days concerned.

The most recent (and final) pour was mixed with water and brown Woodland Scenics paint to minimise the extent to which paint would be asked to cover white plaster.

I have also had issues with the opacity of the Woodland Scenics products. In plain English they don't block out as much of the plaster colour as I had hoped. In consequence I have had to build up the paint coat by coat.

This is how it looked today with a mix of about 75% Earth Undercoat to 12.5% Burnt Umber and 12.5% Raw Umber.



I looked back at reference photos and felt this was too much like caramel so one more coat has gone on since the picture was taken which is 60 : 40 Earth Undercoat and Raw Umber. I am hoping this will show a good colour when fully dried. Once I am happy with the final colour the piers will be cleaned of spill and slop and the Magic Water will be the next addition to the scene.

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