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Ash Handling Plant - Scratchbuilding. - More Practical Help - Your Model Railway Club
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 Posted: Sun Jan 9th, 2011 01:36 pm
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Perry
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With my Coaling Plant project nearing completion, I felt it was time to make a start on its companion; an Ash Handling Plant. I found some plans on the internet and set about adapting them for my purpose. Mine will only be a single road plant, mainly due to lack of space on the layout for anything more!

As the plans drawn up in Sketchup 8 for the Coaling Plant were so successful, I decided that this was again the way to go.

I scaled up the internet plans to give me the approximate dimensions, then tweaked them where necessary as I went along, taking into account the thickness of plastikard, etc.

The overall height will probably be about 207mm but I still need to recheck some dimensions before building can start.

The following images give some idea of how it will look, but I haven't included stairs, hoist rails, cables, or other similar details:









Perry



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 Posted: Sun Jan 9th, 2011 01:47 pm
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henryparrot
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Perry
Showing my ignorance here if its an Ash plant i assume an engine drops its ash at the back of the plant and it goes up a conveyer or something at the back and is dropped in the big hopper then wagons are pulled underneath the hopper and the ash is dumped into them is that roughly right?

Brian

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 Posted: Sun Jan 9th, 2011 01:54 pm
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Perry
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The loco drops its ash through grilles in the ground into an undergound hopper, at the bottom of which is a skip. When the skip reaches a certain weight, the automatic control gear, situated in the cabin at the very top, closes the grilles and hoists the skip up to the top hopper on rails - a bit like the wagon hoist on the coaling plant - then tips the ash into the top hopper. The top hopper is discharged through the two outlets into wagons waiting beneath. The dust this must have created can only be imagined! :shock:

The plans can be found near the bottom of the page at http://www.newrailwaymodellers.co.uk/Forums/viewtopic.php?f=6&t=17094

Perry



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 Posted: Sun Jan 9th, 2011 03:00 pm
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owen69
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just as a matter of interest, most of the ash from these plants was used in the preperation
of ladies cosmetics, powders and lipsticks being just two!!
:thud:mutley:mutley:cool:

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 Posted: Sun Jan 9th, 2011 03:03 pm
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Perry
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I wasn't aware of that, Owen. :shock:

Perhaps I should build a cosmetic factory on the layout. They could have the ash delivered while it is still warm! :mutley

Perry



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 Posted: Sun Jan 9th, 2011 04:45 pm
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Perry
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The two loco road sides have been cut out of 0.040" Plastikard and the upper two sections of the legs fitted to each. All the different angles made it quite a tricky job. The legs are made from 4.8mm square 'Evergreeen' sytrene strip.

The cabin floor has been partially cut out of 0.040" Plastikard but still has to have the stair access sorted out.

The most complex sub-assembly of this project is going to be the two outlet chutes but I will use Sketchup 8 again to provide the dimensions and angles required.

Maybe I'll post a couple of photos tomorrow when there's a little more to see.

Perry



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 Posted: Sun Jan 9th, 2011 08:26 pm
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Alan
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Can't wait that long Perry :roll:

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 Posted: Mon Jan 10th, 2011 08:46 am
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Perry
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I'm not intending to go into too much detail about this build, because it is similar in many ways to the Coaling Plant project - but smaller!

I decided to build the main body of the plant and cabin as sub-assemblies and then to fit the lower legs and rails, etc, later. The lower legs would be too easily damaged during construction otherwise. It looks as though they will have to be pinned and glued, but I'll decide that later.

The first photo shows the work so far:



The two peculiarly shaped panels at the front will form two faces of the upper hopper with some small spacers to fit at the bottom where the outlets will be. The four straight pieces are the lower legs and the other panel. at the rear, will be shaped to form the cabin deck. The main structure, on the right, will eventually be raised onto the legs to allow space for locos to pass beneath.



This side-on shot of the main structure shows the differing angles that make it such an interesting build. :shock:
Even the panel joining the two sides has an angle in it about two-thirds of the way along.



In this photo, one of the hopper sides is being test-fitted. I have installed a pices of plastikard behind it that serves two functions. Firstly, it provides a locating ledge to glue against, and secondly, it provides a double thickness of plastikard at the top edge of the hopper which would have looked too thin otherwise.

The legs are made from 4.8mm square styrene strip and the remainder of the structure so far is all 0.040" plastkard.

Perry



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 Posted: Mon Jan 10th, 2011 11:26 am
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Wayne Williams
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That Sketchup 8 appears to be a great tool Perry. I just realized that it is available for a Mac computer, so I have downloaded it. Still very lost in how to navigate all the controls though.

Great start on the Ash bin. It seems you have been working on the drawings for awhile now or is sketchup that fast?

Wayne



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 Posted: Mon Jan 10th, 2011 11:42 am
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Perry
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With a little practice, Sketchup 8 is very quick to use. I drew up the plans for this model in a couple of hours.

There are lots of tutorial videos available on the internet, both on the Sketchup site and elsewhere. A quick Google search will turn up plenty. That's how I learned the basics.

..............................................

I have fitted the hopper chute plates and plated in the undersides with 0.020" plastikard.



Please excuse the dust in this shot. I've got a bit more cleaning up to do!

To join the two side plates, I made up two little 'plugs' for 0.040" material. I cut two 12mm squares and two 10mm squares and laminated them like this:



They they slotted neatly between the two angled side plates, giving me a locating edge all round to hold them in position and to provide a good glueing surface.

The remaining four angled plates were made rom 0.020" plastikard, cut slightly oversize, them trimmed back after being fixed in place with solvent.

Perry



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 Posted: Mon Jan 10th, 2011 03:44 pm
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Perry
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Work on the cabin has progressed, with the window frames yet to be completed.

The cabin floor has been shaped to accomodate the access stairs.

In the following photo, the cabin and it's floor are only stood roughly in position and are not yet fixed.



Apart from that, the main fabrication is almost complete. I have the lower legs to attach and stairs and handrails to add, along with the skip rails and hoisting gear. A few more details to add and the job will getting towards the painting stage. I'm planning on having a  day soon priming lots of stuff, saving having to clean out the airbrush too many times.

Perry



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 Posted: Mon Jan 10th, 2011 11:52 pm
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Marty
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Stating the bleeding obvious... but for those that haven't yet had a go with sketchup...

The big advantage of using sketchup as a modelling tool is that the drawing commands in the software allow you to think about the construction of the project and how it will all fit together, highlighting problems and pitfalls that might appear during construction that can be solved in virtual reality... long before expensive plasticard is cut and glued.

I used it when setting up the module standards and recommend it to anyone contemplating scratchbuilding anything complex. It didn't take me long to work out the commands, mind you I use graphic design software in my day to day life, and once up to speed enjoyed the process.

The coaling and ash plants are going to be imposing models in your MPD Perry, looking forward, as are you I'm sure, to seeing them painted and in place. :thumbs



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 Posted: Tue Jan 11th, 2011 07:42 am
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Perry
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Thanks for the kind comments, Marty.

Thanks also for your endorsement of Sketchup 8 (SU8). Identifying potential problems with construction was something I hadn't really thought about, but it really is true. I thought I was only using SU8 for design, but thinking about how to put the drawing together does actually make one realise where problems might crop up.

Perry



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 Posted: Tue Jan 11th, 2011 11:42 am
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Perry
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The window frames and the door of the cabin have been completed and it has been given a quick coat of primer. I want to paint the window frames before I glaze the window.

The bottoms of the legs on the upper structure were flattened by drawing the whole sub-assembly across a piece of abrasive paper on a sheet of glass. This will ensure that all the lower legs have a level and flat surface to adhere to.

I'm going to tape the four legs together in a bundle and do the same with them.

Once all the mating surfaces are flat and true, I will tape the legs to a sheet of glass, one pair at a time, ensuring they are parallel, and then glue the upper section in place. Once dry, I'll turn the whole lot over and repeat for the other pair.

Perry



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 Posted: Tue Jan 11th, 2011 12:07 pm
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MaxSouthOz
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Very impressive, Perry.  :thumbs  Is there a prototype on which you are basing this unit?  Not being British, I've not seen anything like it.



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 Posted: Tue Jan 11th, 2011 12:11 pm
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Perry
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If you check out this link, Max:

http://www.newrailwaymodellers.co.uk/Forums/viewtopic.php?f=6&t=17094

and scroll down past the coaling stage part, there is a photo and plans for a similar ash plant on there. IMy model is based on, but not identical to, a structure like this. As with coaling stages, it seems no two were identical anyway, so as long as the required elements are present, it ain't gonna be wrong! :thumbs

Perry



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 Posted: Tue Jan 11th, 2011 04:56 pm
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Perry
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The lower legs have been fitted, along with the trim strips to pack out the width of the legs to align with the sides.

The cabin floor has been trimmed and fitted, but the cabin itself is not yet glued in place.

The cabin window framing was made from 11 pieces of microstrip, glued together with solvent. The glazing was added after painting.

There is still a bit of cleaning up to do, but this is how it looks so far.....



Work will start on the skip hoist hardware soon.

Perry



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 Posted: Tue Jan 11th, 2011 06:54 pm
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MaxSouthOz
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Very impresive, Perry.  No wonder you chose them.



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 Posted: Tue Jan 11th, 2011 08:29 pm
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As always a pleasure to share the Master Craftsman's work . Lovely chubbly as always, :cheers

Thats going to look great on the GWR MPD :mutley:pedal

Phill

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 Posted: Tue Jan 11th, 2011 08:32 pm
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Janner
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That's very impressive :pathead  it's coming on really well.

The one thing that I can't really work out is why the ash towers needed to be so tall :???:

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