Decauville 0-4-0 1:22.58 Scale

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diddler
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Re: Decauville 0-4-0 1:22.58 Scale

Post by diddler » Wed Oct 14, 2020 9:44 am

Thank you for the info, I will start at the 80 psi pop off, seams like a fair point to start at.

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diddler
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Re: Decauville 0-4-0 1:22.58 Scale

Post by diddler » Wed Oct 21, 2020 3:53 pm

The battle continues on trying to build the boiler, Silver soldering with a torch has not gone well for me. I decided to give up that idea and went with tig welding. Yesterday I started testing and found a few small leaks in my weld. I managed to receive a nice sun burn from the flash, I do this to myself all the time forgetting about the UV light. As it stands right now, I have ordered a 1/4 inch electric die grinder to remove my weld on the inside bulkhead, this I will re-weld using the tig and wire to make the fillet. The copper tubes weld well using the tig and silver solder, however you need to direct the arc at the steel, and flow it to the copper, otherwise you will need to replace the copper tube, This I have learned by failure :-). I will keep you informed on my boiler conquest, I will win.

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diddler
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Re: Decauville 0-4-0 1:22.58 Scale

Post by diddler » Thu Oct 29, 2020 3:37 pm

The battle is over on the boiler, I concede, I gave it to a weld shop to weld the bugger. The inner bulkhead was my nemesis, no matter how well I made the weld in that area around the bulkhead to the tube wall, I would get weeping of the water. The frustration was mounting may I say. That bulkhead was about 3" down inside the tube, the weld looked very good to me. The first thing the welder person said to me is " You cant get a good weld down inside like that. Cut the tube then weld the tube end back on" Even after looking at several pictures where people have cut the end off the tube to weld up close, I never gave that a thought" Again, I can weld but I am not a welder. The boiler broke my spirit so I gave it to a professional to weld, and drank some spirits LOL.
Some times one must step aside allowing others to take charge.

Pontiacguy1
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Re: Decauville 0-4-0 1:22.58 Scale

Post by Pontiacguy1 » Thu Oct 29, 2020 4:11 pm

As long as you get it done, there's nothing wrong with farming out a part of it that you don't have the skills, equipment, patience, or time to get done yourself. A lot of people would let that one roadblock stop them dead for a long time. Glad you didn't.

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diddler
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Re: Decauville 0-4-0 1:22.58 Scale

Post by diddler » Thu Oct 29, 2020 4:56 pm

Na, I love building this locomotive, it is awesome to see it come all together and work. I knew the boiler was going to be something I needed to get help on. I would have been more surprised if it didn't weep water. Part of learning is to always try. If I had cut the end of the tube off, everything would have been fine with my welding, I am happy knowing that.

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Fender
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Re: Decauville 0-4-0 1:22.58 Scale

Post by Fender » Thu Oct 29, 2020 7:05 pm

“A man has to know his limitations” - Clint Eastwood / Dirty Harry, “Magnum Force”.
Similarly, I have built a steel boiler, and did the machining, fitting, tube rolling, etc. myself, but left the welding to someone else, due to vision difficulties.
Dan Watson

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NP317
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Re: Decauville 0-4-0 1:22.58 Scale

Post by NP317 » Thu Oct 29, 2020 8:08 pm

Understanding and utilizing your available resources is the key to all projects in life.
I literally used to teach that to my Mechanical Engineering students!
Well done going to your professional welder.
RussN

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diddler
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Re: Decauville 0-4-0 1:22.58 Scale

Post by diddler » Sat Oct 31, 2020 10:33 am

One thing I noticed about this boiler design that isn't any good is the way the person has the pressure tubes that feed the cylinders, they would block the flow of the exhaust up the stack causing pressure not a vacuum , this would  block the draft because it would blow the exhaust back down the tubes to the fire box.
I have laid  this out in a better design, when I finish it I will send pictures

--

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diddler
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Re: Decauville 0-4-0 1:22.58 Scale

Post by diddler » Fri Nov 06, 2020 11:40 am

For some reason I am just not understanding what or how to do.
I am looking at car drawings for my locomotive a Julius of WAAL had posted. They are the same scale as my Locomotive 1:22.5, However, the track gauge is 45 and I need 64. :roll:

I am confused a little for some reason. Locomotive is 1:22.58 Car is 1:22.5 ,If both the cars and the locomotive I am building are the same scale, how would I scale up the track gauge to fit 64mm from 45mm. Do I just move the mounting dimensions out to make the wheels 64 track gauge , and leave all other dimensions as is?

Any guidance please :oops:

Pontiacguy1
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Re: Decauville 0-4-0 1:22.58 Scale

Post by Pontiacguy1 » Fri Nov 06, 2020 12:51 pm

European Meter gauge railways come out to 45mm gauge if done on 1:22.5 scale, so your car drawing is for a narrow (meter) gauge car. Your locomotive is for standard gauge (4' 8 1/2"), so 1:22.5 scale comes out to 64mm or 2 1/2" gauge.

That happens a lot, and some people do it intentionally so that they can model narrow gauge and standard gauge trains side-by-side in the same scale. They often use dual-gauge track.

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diddler
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Re: Decauville 0-4-0 1:22.58 Scale

Post by diddler » Fri Nov 06, 2020 1:51 pm

Thank you sir, I think i have a path to make the cars for standard gauge, maybe, if not, I will ask more questions LOL

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diddler
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Re: Decauville 0-4-0 1:22.58 Scale

Post by diddler » Fri Nov 06, 2020 3:37 pm

Ok, it looks like I can take the drawings and scale it up to the size I want by taking the value in the drawing then times it by 1.347

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