Author Topic: CONWAY 0-4-0 3 1/2" GAUGE LOCO  (Read 94418 times)

Offline crueby

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #990 on: October 10, 2019, 05:36:53 PM »
Excellent!
 :popcorn: :popcorn: :popcorn:

Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #991 on: October 10, 2019, 05:48:42 PM »
Hi

Thanks Chris  :ThumbsUp:

It's been a challenge to say the least.

It seems lots of loco owners have trouble with regulators, maybe it's one of those things that doesn't scale down very well.

The use of ball valves is becoming very popular.

I have 4 more locos waiting in the wings (Note to self, stay off ebay  ::)) so if this works ok I will use it on the others. Perhaps a larger dome bush in the boiler for one thing.

Cheers

Rich

Offline Admiral_dk

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #992 on: October 10, 2019, 09:17:40 PM »
Quote
The dome now fits  :whoohoo:

Great to see you succeed in the end  :cheers:  and it is one of those you will remember for quite some time  ;)

OK - back to the  :popcorn:

Offline crueby

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #993 on: October 10, 2019, 09:30:02 PM »
The engines I have done used a needle type valve, some screw it in/out others it slides in/out with a lever for the throttle function. Does the regulator in the Conway design do the same function? Not sure why it is more complex if so?  :headscratch:   Not a criticism at all, I just have not seen many designs and am still learning the different ways this is done.
 :popcorn: :popcorn: :popcorn:

Offline Kim

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #994 on: October 10, 2019, 09:40:19 PM »
Congrats Rich!  Great solution!  :ThumbsUp: :ThumbsUp:
Glad to see you got it all sorted, and it all fits now :)
Kim

Offline cnr6400

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #995 on: October 11, 2019, 02:43:45 AM »
Great news Rich! well done.  :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:

Online Steamer5

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #996 on: October 11, 2019, 03:48:34 AM »
More than one way to skin the cat!

Well done Rich.


Cheers Kerrin
Get excited and make something!

Online mike mott

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #997 on: October 11, 2019, 05:48:04 AM »
Your perseverance finally resolved the issue well done Rich!

Mike
If you can imagine it you can build it

Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #998 on: October 12, 2019, 10:46:15 AM »
Hi

Thanks Admiral, Kim, cnr6400, Kerrin and Mike  :ThumbsUp:

Chris, here's plan for the regulator



It relies on the disc being a perfect seal on the body, initially being held by the small spring and then by steam pressure.

When I was trying to do the hydraulic test I could not get it to seal. I tried lapping, increasing the spring pressure all to no avail.

Don't quote me on this ( I'm sure someone will let us know) but I would imagine that in full size the disc would be 9" or 10" in diameter and have plenty of surface area to seal.It could be it's one of those things that doesn't scale down very well.

The screw down type of regulator seems to be much preferred by model loco builders. To fit one these requires a large enough wet head bush on the front tube plate through which the regulator can be fitted. Unfortunately Conway has a smallish bush, not big enough to get a screw down type through.

Which brings us onto the ball valve which is now being favoured by many builders. Available in stainless steel for a £5 on ebay ready built.

So we will see if it works

Cheers

Rich

Offline Admiral_dk

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #999 on: October 12, 2019, 11:20:20 AM »
Looking at the drawing, it is obvious that it's located there for clean steam and its pressure on the valve ...!
But with the valve you used, there's no point in putting the valve up there and "muddle" the operation of it with the links etc. - its only important that the intake pipe you put into it ends up in dry steam up in the dome ...!

Best wishes

Per

Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #1000 on: October 12, 2019, 01:24:52 PM »
Hi Per

Yes thats right it collects dry steam at the top of the dome. I did look at mounting the ball valve horizontaly in the boiler but making the linkage would be difficult. Doing it this way keeps most of the existing backhead bush and shaft etc.

Cheers

Rich

Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #1001 on: October 12, 2019, 05:18:39 PM »
Hi

Started to re-build the boiler. I have given the lagging a quick coat of spray paint to tidy up a few scratches





Cheers

Rich

Offline Kim

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #1002 on: October 12, 2019, 05:46:58 PM »
That looks really great, Rich!  :popcorn:
Kim

Offline Firebird

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #1003 on: October 13, 2019, 08:38:25 AM »
Hi

Thanks Kim  :ThumbsUp:

It might be a while before I can get back on it.

Who said when your retired you will have plenty of time  ::)

This week the grand kids are off school for the half term break

Oh well your Dads not doing anything said SWMBO  :shrug:

Cheers

Rich

Online mike mott

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Re: CONWAY 0-4-0 3 1/2" GAUGE LOCO
« Reply #1004 on: October 13, 2019, 02:49:50 PM »
Quote
This week the grand kids are off school for the half term break

Oh well your Dads not doing anything said SWMBO

Ah yes but in a few years they won't want to spend any time with you so it is a precious little interlude in our lives. they grow up so fast. Today I am off to watch my 7 year old grandson in his second hockey game. I missed his first unfortunately where he scored a hatrick.

Good to see the boiler with the dome closed, chickened out and have chosen to use a needle valve on my little loco, with the collection pipe open at the top of the dome.

Mike
If you can imagine it you can build it