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Scratch building O scale rolling stock. - Scratchbuilding. - More Practical Help - Your Model Railway Club
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 Posted: Sat Mar 5th, 2016 12:59 pm
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MaxSouthOz
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Thanks, Terry.



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 Posted: Sat Mar 5th, 2016 01:12 pm
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Ed
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Looks great Max :thumbs, but must be a very fiddly job with all the small bits of styrene.


Just wondering if you would have ever considered doing something similar in HO, or is it even possible in the smaller scales.


Ed





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 Posted: Sat Mar 5th, 2016 03:12 pm
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MaxSouthOz
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It's not too bad, Ed.

I haven't tried any scratch building vehicles in HO - only buildings.

This is a confluence of several situations.  I started building in Ow5 because I got interested in a 1:50 boat and I thought a 1:48 layout would be good ( http://yourmodelrailway.net/view_topic.php?id=14066&forum_id=21 ), which you know about.

Then I realised that being one subject away from my Master Modeller, I could scratch build 8 pieces of rolling stock to qualifiy - and populate my new layout at the same time.

Otherwise I wouldn't have done it, but I'm quite glad that I have.



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 Posted: Sat Mar 5th, 2016 04:18 pm
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Ed
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All I can say is well done Max, and you must have a lot of patience :thumbs


Ed



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 Posted: Sat Mar 5th, 2016 06:33 pm
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BCDR
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Hi Max,

I had a look at post 20 before my posting my message. I see the air reservoirs upper left, what looks like the AB valve box in the middle, the brake cylinder would normally be to the side of the AB valve and almost in line with the hand brake chain to which it is connected via the vertical actuator lever (not always in line, as usual probably as many variations to the design as builders). Are you following a specific prototype with a combined AB valve/brake cylinder or is this a generic representation?

I'm in the middle of a project on railroad air braking systems, hence the questions. The plumbing on hopper cars is open to view, unlike regular boxcars where it's often pretty much out of sight, with in many cases the only obvious items being the hand wheel/gearbox and retainer valve.

Nigel



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 Posted: Sat Mar 5th, 2016 09:28 pm
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BCDR
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Hi max,

I thought a couple of photo's for those who may be wondering what the brake component arrangement actually looks like (in HO) would be of interest. I had some photos to hand of one of my Kadee covered hoppers, mid-1950's design (Pullman Standard I think).

Four major components (from right to left): air cylinder (containing 2 reservoirs, one for emergency use); control valve (in this case an AB design); brake cylinder and vertical actuator lever; manual brake wheel and gearbox (connected to the bottom of the vertical actuator lever).

One other item that is quite noticeable is the air line for the brakes that runs along the side of the body.

Not sure I would want to scratch build this in HO, although all the brake parts are available in brass or white metal.

Nigel












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 Posted: Sat Mar 5th, 2016 11:56 pm
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MaxSouthOz
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Thanks, Ed.

Thanks, Nigel.  Good reference photos.



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 Posted: Sun Mar 6th, 2016 01:23 am
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MaxSouthOz
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There are lots of little differences from the Atlas HO model I'm copying - much less detail, as well.

Thanks to your photos Nigel, I can add a lot of this stuff.

I'm not looking forward to airbrushing it.  :lol:



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 Posted: Sun Mar 6th, 2016 08:07 am
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MaxSouthOz
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I've printed and laminated your photos, Nigel.

Can you tell me, please - looking from the brake wheel end of the model, does the brake pipe run along the right or left side?

Thanks



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 Posted: Sun Mar 6th, 2016 06:06 pm
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BCDR
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Hi Max,

All the way along one side, the cross-over is made under the platform. Brake rod runs down the middle. Should have some more photos, I will send when found.

Nigel



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 Posted: Sun Mar 6th, 2016 11:42 pm
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MaxSouthOz
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Ah, but which side, Nigel?  :lol:  If I'm standing at the brake wheel end, facing the wagon, is it on the right or left?

I really appreciate these photos.  The Atlas HO wagon I'm copying doesn't have the detail that yours has.  I've fabricated the operating cylinder and the rest of the detail should be straight forward.

The ladder rungs are different, as well.

I'll post up a photo as soon as I'm able.

Thanks, again.



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 Posted: Mon Mar 7th, 2016 05:25 am
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MaxSouthOz
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OK  I've removed all of the steps so I can gain access, and fitted the new brake gear.

Notice that it has the new series larger brake cylinder.  :lol:








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 Posted: Mon Mar 7th, 2016 05:35 am
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MaxSouthOz
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. . . and one from the end.




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 Posted: Mon Mar 7th, 2016 02:15 pm
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Petermac
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Never mind "I've fitted new brake gear" - how did you make it Max ?  It looks a complex structure.

Oh and yes, it looks great. :thumbs



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 Posted: Mon Mar 7th, 2016 02:32 pm
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Petermac wrote: Never mind "I've fitted new brake gear" - how did you make it Max ?  It looks a complex structure.

Oh and yes, it looks great. :thumbs

My thoughts exactly,how did you make it.Great work by the way Max.



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 Posted: Mon Mar 7th, 2016 04:16 pm
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MaxSouthOz
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Thanks, guys.  It's a bit fraudulent, actually.

I just copied Nigel's excellent photos.

The booster is a piece of 5/16" styrene tube.  It should have been 1/4" but I didn't notice it until I'd glued it in.  It's a bit over scale.  The "pipes" are 1/16" brass rod and the "hose" is 1 mm solder.

The tapered cone and both tank ends are made from Knead It.  It's a two pack polymer putty which sets hard, but which you can drill.

I had to cut the steps away to get them in.  I've rebuilt them, but I haven't had time to take another photo.

Once the couplers arrive, I can add the cut lever and the MU hose.  I seem to spend my life waiting for stuff.

Anyway, I've started to build the roof.

Photos in due course. 

Cheers



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 Posted: Mon Mar 7th, 2016 07:30 pm
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BCDR
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Hi Max,

That looks much better. More photo's of the hopper braking system below. It's no wonder these models cost $40 or more new. The trucks are off to show the details, I'm waiting for replacements (they are the sprung ones, new ones will be unsprung).

I have a Bowser hopper model (from a kit) which has no brake piping or lever detailing, just the reservoir, AB valve and air brake cylinder, $15.00.  Detail is expensive. On the roundtoit list (probably 50 cents of material and my time is free).

Nigel


Re what side? B end is on the right, airline pipe is at the bottom. Crossover is at the A end. Chains on end of brake levers would on the prototype link up with the brake shoe levers in the truck. Not modeled for obvious reasons in HO, you could probably do it in O. Just noticed the bottom left trap door frame needs a repair. I cut the levers from styrene sheet when adding brake gear to models that don't have it, and use staples for the guide bars. I believe the loops on the ends of the outside frame are for salvage lifting.




B end. Lever from air brake piston with connecting rod which runs through the bolster to the brake mechanism levers.




T'other end (the A end) showing airline pipe cross over above the coupler gear box.




A end from the top.




B end showing air brake lever running though bolster.






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 Posted: Mon Mar 7th, 2016 08:29 pm
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Max, your hopper looks excellent. Can't wait to see it completed.

I bet ya even with the new supplier you'll have the roof and paint done before the couplers show up though.



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 Posted: Mon Mar 7th, 2016 11:31 pm
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MaxSouthOz
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Thanks, Nigel.

That's very helpful.  :thumbs

Thanks, Brendan.

I've ordered them from P&D Hobby Shop, where I got my drive train parts for my Weaver GP 38.

http://www.pdhobbyshop.com



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 Posted: Wed Mar 9th, 2016 10:58 am
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MaxSouthOz
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Not up to Nigel's standard, but I reckon I'll pass.





I notice that P&D have debited my card, so the couplers are on their way.  :thumbs



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