Search found 216 matches

by andrewnummelin
Fri Jun 26, 2020 3:02 pm
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Re: Little & Large - The Socially-Distanced Challenge

Guy, Many thanks for the very interesting and useful information. PA12 does indeed appear to be a good candidate material for this sort of application but it may be touch and go for minimum thickness - I’ll do a drawing and submit it to see how it is rated. I’ve been thinking through how to make the...
by andrewnummelin
Thu Jun 25, 2020 10:36 am
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Little & Large 6 - The Socially-Distanced Challenge

Only just realised that part 5 had not been posted when it should have been and this one should have appeared yesterday. Little & Large Today is a bad day! I'm missing some bolts and will have to go out shopping, now that it's allowed. It's not just the missing bolts as some new tools have arri...
by andrewnummelin
Thu Jun 25, 2020 10:29 am
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Little & Large 5 - The Socially-Distanced Challenge

This should have been posted on 11 th June but for some reason, probably my carelessness, it did not appear. Little The first coal box has been made - quite fiddly. The basic box was made from 2thou brass shim, being the nearest in thickness to the scale size of the prototype's 3/16". I wonder...
by andrewnummelin
Thu Jun 25, 2020 7:47 am
Forum: Track and Turnouts
Topic: A4 points out of 6 chain curves
Replies: 9
Views: 493

Re: A4 points out of 6 chain curves

A good initiative, well done.

Based on a problem I recently had with a printer not doing exactly what it should have done, may I suggest that, if possible, you add a scale rule in both x and y directions so the accuracy of the final print can be checked.
by andrewnummelin
Sun Jun 14, 2020 11:38 am
Forum: Other Workshop Practice
Topic: A machining question.
Replies: 9
Views: 854

Re: A machining question.

Gents, Thanks for the advice and questions that have made me think... Accuracy needed? Visually irrelevant, good enough to work - I've no idea what that means numerically! Number needed? Three (so six suspension links), so no need to think of "mass production" unless the carpet god gets ve...
by andrewnummelin
Fri Jun 12, 2020 8:25 pm
Forum: Other Workshop Practice
Topic: A machining question.
Replies: 9
Views: 854

A machining question.

I was wondering if anyone could suggest a good method of making the part shown in "C" (with fittings) and "D" (plain) below: the side elevation is in "B", "C" and "D" are views from underneath. Capture.JPG My initial thoughts are milling (but I'm not...
by andrewnummelin
Wed Jun 03, 2020 12:21 pm
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Little & Large 4 - The Socially-Distanced Challenge

Progress! And a request for help. Things have moved slowly as, to relieve the tedium of fiddly bits, I've also built a Slater's van kit that has been in the cupboard for over 10 years: and there was the garden and good weather! Little So the CAD drawing was resized differently in the x & y direc...
by andrewnummelin
Tue May 26, 2020 10:17 am
Forum: Wagons
Topic: Exactoscale wagon chassis kits
Replies: 13
Views: 1264

Re: Exactoscale wagon chassis kits

By chance I've been working with similar problems. As an interlude from the lockdown challenge I decided to do something simple and build a Slater's MR van kit and fit it with Exactoscale suspension bits that I've had in stock for many years. I used the conversion bits (solebar and W irons as single...
by andrewnummelin
Tue May 12, 2020 10:03 am
Forum: Track and Turnouts
Topic: Single and Double Slip Operation
Replies: 8
Views: 1393

Re: Single and Double Slip Operation

If you want to have a nice plan drawn with software then Templot, but for this purpose pencil and paper is much quicker if you have a scanner. Without a scanner a sketch using 'Paint' will also do. Suggest using coloured pencils - at least three, one for each "+ve and -ve" and one for the...
by andrewnummelin
Mon May 11, 2020 9:54 am
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Re: Little & Large - The Socially-Distanced Challenge

... I made up a true faceplate from a lump of brass to secure the tyre to with double sided tape, having removed the moulded centre, after all I was only taking gentle cuts, and I wanted to be able to remove the tyre without distortion. It took a fair time even taking a fraction off at a time, and ...
by andrewnummelin
Sun May 10, 2020 12:12 pm
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Little & Large 3 - The Socially-Distanced Challenge

Two steps forward and seven steps back Large The profiles and other bits ordered from Eileen's arrived quickly but nothing has been done with them yet fortunately! Little A start was made with the wheel sets: to check that everything else would work, I decided to use standard wheels first before em...
by andrewnummelin
Fri May 01, 2020 7:11 am
Forum: On My Workbench
Topic: Socially Distanced Challenge – CR Class 488 Build
Replies: 57
Views: 4409

Re: Socially Distanced Challenge – CR Class 488 Build

Lovely.
I’m looking forward to following this as I’ve a wish to model an 0-4-4WT (with open cab) and have always thought that hiding the motor and gearbox could be a challenge, as will getting the balance right to keep it on the track and able to pull a decent load.
by andrewnummelin
Sun Apr 26, 2020 7:03 pm
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Little & Large 2 - The Socially-Distanced Challenge

Not much progress to report as the weather has meant the garden took priority! Still some things have been done. little and large 002.jpg Little Solebars and one headstock have been fitted to the floor. The second headstock can probably only be fitted once the underframe is running OK as it will blo...
by andrewnummelin
Fri Apr 17, 2020 12:23 pm
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Little & Large - The Socially-Distanced Challenge

LITTLE It became clear as I was doing the model drawing that the original had highly detailed and dimensioned boxes but the underframe was probably best regarded as the equivalent of a loco weight diagram - a good impression but not necessarily correct in all aspects. So the changes & assumptio...
by andrewnummelin
Thu Apr 16, 2020 10:05 am
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Re: Little & Large - The Socially-Distanced Challenge

Penrhos1920 wrote:Cambrian do the axleboxes on their GWR bogies, the last proprietor sold them separately. Rhymney Models also offer them as castings.

Many thanks for the leads. I hadn't realised that Rumney Models did anything other than items much too modern for my projects! I'll contact Justin for information.
by andrewnummelin
Tue Apr 14, 2020 6:09 pm
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Re: Little & Large - The Socially-Distanced Challenge

can I turn the stanchions? I have doubts about my abilities. Looking at the drawing Andrew, the stanchions look to be parallel above the solebar so they may have just slide into the "socket". Perhaps a plain length of rod/wire of the appropriate diameter and a piece of tube to suit. This ...
by andrewnummelin
Sun Apr 12, 2020 12:14 pm
Forum: andrewnummelin
Topic: Little & Large - The Socially-Distanced Challenge
Replies: 16
Views: 2273

Little & Large - The Socially-Distanced Challenge

Well here goes. The "little" one is a Taff Vale Railway wagon with iron boxes for carrying coal, the drawing being dated 1851 was numbered 4845 in the old BR/OPC collection and I also have a copy of drawing 4846 that shows a slightly different design box. TVR coal box wagon trimmed.jpg The...
by andrewnummelin
Sun Apr 05, 2020 11:45 am
Forum: On My Workbench
Topic: The Socially-Distanced Challenge - Registration Thread
Replies: 46
Views: 5192

Re: The Socially-Distanced Challenge - Registration Thread

Little and Large I should really start anything else - my shelf of shame with unstarted kits and part started projects runs to around a hundred items... But here goes anyway! Two drawings that I've had for a very long time, one small and one large wagon with some challenges, particularly in the are...
by andrewnummelin
Wed Apr 01, 2020 10:31 am
Forum: Where to Find?
Topic: Marking gauge?
Replies: 25
Views: 1973

Re: Marking gauge?

Here's mine with a frame spacer marked out with it. marking gauge.jpg If I were making another I'd make the guide a bit bigger and possibly have it on a screwed thread to make precise adjustments a little easier. Perhaps, without a lathe, start with a threaded rod, nut for the guide, lock nut to hol...
by andrewnummelin
Sun Mar 15, 2020 10:51 am
Forum: Exhibitions
Topic: 7th Chris Kedgley Skills Day
Replies: 34
Views: 4261

Re: 7th Chris Kedgley Skills Day

From me as well, very many thanks to all involved with putting on an excellent event. I went hoping to pick up some ideas for solving some of my problems and came away with those and quite a number of extra items as well.

Roll on the next one! (The hunt starts for topics to bring.)
by andrewnummelin
Sun Mar 08, 2020 2:10 pm
Forum: Coaches and NPCS
Topic: end steps
Replies: 11
Views: 1768

Re: end steps

Couple of photos here of a cast of an RTR backhead. Note in particular the thin shelf above the firehole door. (The regulator, by the way, is a separate fitting.) 20200306_164456.jpg 20200306_164416.jpg I would use Bill Bedford's suggestion to produce 5 or so masters, and then cast them all at once...
by andrewnummelin
Sun Mar 08, 2020 2:04 pm
Forum: Coaches and NPCS
Topic: end steps
Replies: 11
Views: 1768

Re: end steps

Thanks guys. I'm pretty confident that I would never be able to cut enough individual steps consistently by hand before deciding to take up a different hobby. So I think it will be a case of drawing them up and waiting until I can put enough (different) items on one sheet to make it worthwhile havi...
by andrewnummelin
Fri Mar 06, 2020 9:01 am
Forum: Coaches and NPCS
Topic: end steps
Replies: 11
Views: 1768

Re: end steps

Have you thought about making a master, moulding it and casting them in resin? You might have a high failure rate at the actual casting stage, and they'd be fragile in life, but it should be possible - I've cast down to 10 thou before, albeit for parts which will not be knocked. Thanks for the sugg...
by andrewnummelin
Fri Mar 06, 2020 8:58 am
Forum: Coaches and NPCS
Topic: end steps
Replies: 11
Views: 1768

Re: end steps

Just thought that I would mention that It looks to me as if the drawing and the photograph do not correspond. The drawing shows a semi-circular vertical part of the footstep whereas the photo looks more rectangular with rounded corners. Steve Correct. They are different designs for 2 different sets...

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