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G3 Trader Discussion Group / fosworks radio control
« Last Post by AshleyW on Yesterday at 02:16:11 PM »
steve foster has taken over from peter speorer radio control and can supply electric or steam radio sets and also does superb jobs of fitment, his website is http://www.fosworks.co.uk/ and he is based in the northwest.
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Battery Powered Steam Outline Locos. / Re: A Dean Conundrum.
« Last Post by John Candy on Yesterday at 09:17:19 AM »
A bit more research and with help from RCTS Locomotives of GWR Part 7 (Dean's Larger Tender Locomotives) I have a tentative plan.

The Barnum boiler and firebox were not the same length as the 2301 class( Dean Goods) and the wheels were larger (would have meant re-jigging the cab as well as the splashers).

However, the rather "quirky" 3521 class 4-4-0 had the same wheels (5ft 2ins) as the 2301 and a few carried the same boiler. The coupled wheelbase is 3 ins greater than the 2301 but since a new chassis will be built, the only alterations to the body (above running plate level) will be to remove the sandboxes and leading splashers  (filling the holes left in the running plate) and moving the middle splashers forward a few millimetres to accommodate the longer coupled wheelbase. The only additions to the running plate will be the axle springs which sit in front of the splashers, these locos having outside frames with extended axles and flying cranks.
A new tender will be required and this is definitely a "back burner" project!

The last 3521 was withdrawn during 1931  (a few years earlier than I would have liked) but it will look good at Monkton Priors, alongside the Dean Goods and Bulldog.

John.
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Other Topics / Boiler Inspectors Seminar Peterborough
« Last Post by cabbage on Yesterday at 08:01:24 AM »
Despite being dehydrated, starved and baked alive, I actually had a very informative and enjoyable day. These are some shots of "The Black Museum".




After lunch we went outside and performed a hydraulic pressure test on a boiler and visual examination of a loco prior to doing a live steam test.











They also demonstrated testing the pressure meters and getting them certified by a lab. What is most important is that the red line is accurate to the test meter. If it fluctuates as it rises that is acceptable.

Regards

Ralph
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Other Topics / Re: Die-cutting low cost coach parts.
« Last Post by John Candy on April 22, 2018, 09:26:10 PM »
After quite a bit of experimenting with different pressure settings and blades, I successfully cut the test piece of panelling.

Both the base layer and panelling layer were individually soaked with Ronseal Wood Hardener and allowed to cure  before laminating with Roket Card Glue.

The part shown in the photo is at least as rigid as would be plywood of the same thickness (2mm) and will not split or splinter if forcefully twisted.

Next the backing (reinforcing) layer will be cut and treated as above before being attached.

John.
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Battery Powered Steam Outline Locos. / A Dean Conundrum.
« Last Post by John Candy on April 21, 2018, 09:16:27 PM »
A Dean Conundrum.

I am left with a Dean Goods loco body after removing the chassis and tender for use with other locos.
History : The loco. was built by Roger Marsh for Roger McL, utilising loco chassis and tender parts produced by Walsall Model Industries. The parts were intended to have been part of a Collett 2251 class 0-6-0 but Roger asked Roger to build a Dean Goods.

To cut a long story short, I already have a Dean Goods (I built from a GRS kit) and the surplus tender (a Churchward 3500 gallon) is not a type coupled to Dean's Goods locos (they ran with Dean tenders of 2500 and 3000 gallon patterns).

My solution has been to couple the tender to a Bulldog 4-4-0 (3444 "Cormorant" of the final "Bird" Series) and use the 0-6-0 chassis under a 2251 Colett 0-6-0 (as originally intended) and couple that to new-build 3000 gallon Dean tender.

Still with me or have I lost you?

Anyhow, I am "snowed under" with projects at present, so commissioned Mike Danby to build the Bulldog loco plus the loco body and tender for the 2251 class....... choice was made on premise that they would suit Monkton Priors as well as my own line.

The conundrum? Well, I am left with a surplus Dean loco body which is too good to waste but what to do with it?!!

The boiler and cab can be readily adapted for other Dean locos. The only class that I can see at present which suits the available parts and fits my model period is a "Barnum" 32XX class 2-4-0 tender loco. (the last was withdrawn at beginning of 1937).

Any thoughts?

John.
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Other Topics / Re: Die-cutting low cost coach parts.
« Last Post by John Candy on April 20, 2018, 10:58:16 AM »
Ralph,

The machine holds two tools simultaneously and works on a layering system.
I am not yet fully conversant with all the "ins and outs" having only used a single cutting tool.

It works by slicing the drawing into layers, each representing a single pass of the installed tool (or tools).
When you prepare the layer, you add any colour to the section to be cut away.
When the project/image is uploaded to the Cricut design platform, you then select the sections to be removed by clicking on the coloured area.

The result is a line-drawing (B&W) which shows precisely what you will get (the removed sections shown by the usual "transparency" grid.

You then manipulate the overall scale/size odf the component by input of specific dimensions or by dragging the nodes.

It is far simpler to do than to explain.

The scoring tool I have not yet used .... it fits alongside the cutting head and scores while the cutter cuts.... when I have tried it out, I will post another message.

Currently "stuck" until the 700 Micron card arrives from Amazon.

Regards,
John.
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Other Topics / Re: Die-cutting low cost coach parts.
« Last Post by cabbage on April 20, 2018, 10:45:27 AM »
John,
Is the PNG file simply black and white -or does the machine interpret colours as commands?

The laser cutter system used by the laser shop that I use takes PNG files but uses red for cut and blue for etch.

Regards

Ralph
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Other Topics / Re: Die-cutting low cost coach parts.
« Last Post by John Candy on April 20, 2018, 09:55:09 AM »
Ian,

No disagreement with anything you have said.

To die-cut does involve investment both in time and "consumables" (as well as the cost of the machine).
So far, in excess of 400GBP has been spent (a shared venture with Roger McL) which is why I suggested a library (with a donation) to access the files, rather than supplying ready-cut parts (resulting in wear and tear on the machine plus replacement blades, "sticky" cutting mats and other accessories).

Regarding copyright/intellectual property rights; the assignment of rights to the "library" would be the consideration for a free set of sides. Placing them in a "library", for use by others (without expecting a "buckshee" set of cut parts) and retaining rights would be perfectly acceptable but only likely to be offered by someone with their own "Cricut Maker" machine.

Incidentally, the machine I have does not require CAD : It will generate code from ordinary (vector or raster) images : I have used PNG format, so anyone interested in participating should not be put off by lack of skills with CAD.

Any payments I were to receive for file access would go specifically to the G3S "Monkton Priors" fund.

Regards,
John.
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Other Topics / Re: Die-cutting low cost coach parts.
« Last Post by IanT on April 20, 2018, 09:26:44 AM »
A very interesting idea John - and everyone seems to be carefully considering it before "inundating" you with offers of help...

Personally, I think this is something that could provide a very useful facility to the G3 Community but I wouldn't participate (should I ever get involved) in quite the way you suggest.

As a general personal preference, if I were to invest my time in the required CAD, it would remain my intellectual property - in other words I would retain control of it (and its use). I would certainly be quite willing to make anything useful available to other members but in this case would prefer to do so in the form of 'cut-parts'.

To my mind - this would be a useful type of product for the G3S 'Shop' to offer, because it could be 'cut-on-demand' (so no stock to hold or manage). This would make it easier to keep control of the property rights and also provide some welcome additional income for the Society.

But in this instance - your CAD and your cutting machine - so your choice how to manage it.

Regards,


IanT   
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Other Topics / Re: Die-cutting low cost coach parts.
« Last Post by John Candy on April 19, 2018, 09:45:02 AM »
Thinking further along the line......

On the assumption these tests have a positive outcome (and I have no reason to believe they will not) there are several possibilities for making the die-cutting patterns available for wider use.

1) Supplying parts to order, ready-cut.
2) Making the patterns (files) available for other Cricut die-cutter owners to use on their own machines (possibly with a modest commission payment to the Monkton Priors fund).

A "library" of designs would be a useful asset to the G3 community.

I have a further suggestion, for anyone wanting to try out the method (without buying a machine). Prepare the necessary files and assign copyright in them to the "library" and you will receive a set of ready-cut sides free of charge.

Before I am inundated, let me say that you need to let me know in advance your proposals so that:
a) I can see that they are possible to successfully cut on the machine.
b) To explain precisely the format, etc. required.

John.
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