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7mm D.C.C. 'O' Gauge - In The Australian Outdoors
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 Posted: Sun Jul 24th, 2016 06:55 pm
   
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Salada
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Robert Comerford wrote: Thanks chaps.

One of the problems with items such as these coal hoppers are the side buffers. I am going to have to extend the couplers to allow them to go around these tight curves without touching and forcing themselves off the track


Hello Bob. I had the same problem with my 'O' Gauge 10-12  ton coal wagons so here is what I did:

1) slightly increase the prototype buffer diameter by + 1" - 2" but do not alter the buffer spacing.
2) make the concave dishing of the bufferheads slightly more than the prototype.
3) use soft pencil graphite to simulate the polished wear area of the buffer centres.
4) polish the bufferheads absolutely smooth before painting or staining them.
5) very slightly shorten the buffer shanks.
6)slightly lengthen each link of the 3 link couplings.

My stock has been examined by all sorts of "experts" at Exhibitions, Club meetings etc. but no-one has ever noticed my slight 'modifications'. None of these alterations are sufficiently obvious to be visible by themselves (except to MY eyes !) but they give a cumulative effect to easier wagon shunting.

These wagons will now go round some ridiculous colliery yard curves (16" - 18" rad) and through switch divergence angles of less than 1:3.

I have also tried using very soft springing on both buffers & drawbar hooks but that doesn't work so well & does not stop 'buffer-locking'; most of my stock has rigid buffer shanks & drawbars.

Unfortunately I cannot show any photos as the FR Gallery refuses to talk to my computer any more.

Regards,     Michael

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 Posted: Sun Jul 24th, 2016 09:35 pm
   
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Salada
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Robert,

I have borrowed Madame's iPad thingy to load photos onto the FR Gallery.
I have no idea why they are upside down.

No jokes please about Aussies falling off at the South Pole.








With the modifications I described above, these wagons will go round any curve you want !.

Regards,     Michael

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 Posted: Sun Jul 24th, 2016 11:56 pm
   
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Herb Kephart
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Michael

I tried to correct your photo problem with no luck.
I couldn't download the photo's from your email, so that I could post them.
Fixable? I'm sure--but certainly not by me.

Herb




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 Posted: Mon Jul 25th, 2016 04:11 am
   
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Robert Comerford
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My temporary fix is to extend one coupler on each wagon. Very crude but not noticeable when running around. The couplers are a small HO European style locally available and work fine on the outdoor layout where curves are the more usual circa 6' radii. While intended for permanent coupling I find I can uncouple with my stick I use for the Kadees without giving the wagons unintended gliding lessons, something I find I do with 3 links.



Later, when many other jobs are finished I might cut back the buffer such that it looks like it is compressed and remove the extension..... my usual method in other scales. Fortunately the long shank Kadees at the end of the rake don't need any adjustment.
However, thanks for offering advice. Always appreciated.
Hmmmm... magnadhesion still exists?? :>;)

Hope to get started on the backscene today. Much easier to do it before the front bit gets filled up.

Better get those coil cars finished Nev as no doubt you will return with a few extra projects.

cheers
 Bob

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 Posted: Thu Jul 28th, 2016 09:18 am
   
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Robert Comerford
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Some of the basic backscenes are in mass production.
Will do some fine detailing later.


cheers
 Bob
p.s. how can I change the thread title to include indoors?

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 Posted: Thu Jul 28th, 2016 09:47 am
   
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NevadaBlue
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I like the back scenes, nice work. I couldn't take the magnetic wheel picture so I rotated one of them.

:bg:



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Ken

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 Posted: Thu Jul 28th, 2016 12:21 pm
   
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Robert Comerford
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Good Ken, that saves me having to invert the laptop :>)

cheers
Bob

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 Posted: Mon Aug 1st, 2016 02:33 am
   
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Salada
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Thanks Ken. Now you can properly see what I suggested to Robert. The buffer heads don't look obviously oversize, nor do the 3 link couplers look overlong, but taken together they greatly reduce the minimum useable track radius.

Regards,    Michael

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 Posted: Mon Aug 1st, 2016 09:46 pm
   
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Herb Kephart
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Ken--
Thanks for fixing one of the shots--here is the other--car is hand lettered, no less! 

Give us a side view of one of your lettering jobs, Michael--(with Madam's help) please?



Herb



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 Posted: Tue Aug 2nd, 2016 12:21 am
   
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Salada
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OK Herb, if you insist. I'll post a few photos but elsewhere rather than hijack Robert's column any more.

Right now I'm ripping out old fitted carpets & underlay and fixing about 5,000 squeaking floorboards. Patience please.

Regards,   Michael

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