boilers ?

[R.G.Y.]

The presant state of play, ready for the solder. Geoff.

[antopia]

Now thats interesting Geoff,
I do like the idea,I've not seen one like that before, to me they look like 22mm pipes but i cannot convince myself
I would suspect more 28mm,are you going to use 2 stage soldering or all in one go.
good luck with the silver soldering,on my boilers, i am always a bit nervous until it passes the pressure test.

regards
Steven

[kno3]

Where is the minimum water level going to be? At the bottom of the top pipe?

[R.G.Y.]

28mm external diameter pipe. Two step soldering first step join pipes and fix safty valve bush, and bushes to end caps. Second step fit end caps. The reason is I will need to remove the ends of the 15mm pipes used to aline the holes in the 28mm pipes deuing assemble. Top pipe steam space. Below the drawings for the case. The calculations I am keeping till later as this is ansome what experimental. Geoff.

[antopia]

Hi Geoff,
at present I cannot view the files as I am using a mac,but I will later,I would suspect you have the heat pass
twice around the pipes,bottom 2 then the middle 3 then out the chimney ,
somthing to think about in my gauge1 It is difficult to know how much water is in the boiler might be worth
making a hole in an endcap for a bush for an electonic water level gauge

Regards
Steven

[R.G.Y.]

Steven,  When you get to see the plan every thing will be clear. It must be OK viewed 15 times and no comments yet. Good or bad.Geoff.

[antopia]

Hi Geoff,
just manage to view your files it looks good
I can see now how the gauges ect are fitted.
I see there has been quite some thought gone into this boiler.

you could use ceramic and angle toward the bottom tubes like a portable gas fire
one on each side.
but i am always saying this as l like ceramic plaque as it is very simple and very efficient .


Steven

[R.G.Y.]

Steven , I am not sure about this ceramic stuff. Do you mean for insulation or the burners or both? I had planed on using tube burners and thermalight block for the insulation. ( the light blue dotted line on the drawing. Any advice gratefully received. Geoff

[antopia]

Geoff ,

I use this stuff for gas work as it is the best I have seen
have to excuse the strange shape for the burner box but my father built the boiler and placed
the firebox too far under the rear axle hence the shape,but it works well.
ceramic plaque is for burners as it has holes in for gas mixture.

ceramic fibre is the insulation
at some point another photo tonight showing ceramic fiber

steven

[R.G.Y.]

Steven, how big is the boiler in the photo? Have you not had time for more pictures?
I have done more work on my boiler and made an alteration to the plan. the photo shows the bushes and the safety valve. center forground is the improvement! the check valve on the end of square to be screwed into bush in boiler, the hole doesn't go strait through, the water will pass through a tube over the burner before going back in the other connection and into the boiler. An identical fitting will do the same for the steam out, but much nearer the heat. geoff a long wait for a reply had computer trouble.

[antopia]

Hi Geoff,
I have been busy!,
ok boiler is 2"dia 7 1/4 long burner is about 1 * 1.5 "
added photo of under loco

you are using what I would say is a good technique by warming cold water before it reaches the boiler and drying the steam output

i have not had time to do photo but I will
what I wanted to show is how it reacts to the heat of a small propane torch
being thin it seems to get a bit brown but still glows red and I can hold it within my hand while being heated without getting burnt, only I have to watch for the
bits not covered by my hand as the propane torch has a wide flame!!!
oh and remember this is only 2mm thick!
Steven

[R.G.Y.]

Steven, Nice one 23 veiws already so some interest but no comments so far. The ceramic insulation I am sure is very good. I will try the block as i need to fill the case close to the pipes. I will keep you posted on progress. and any one else who may be interested. geoff.

[Red_Hamish]

Steven, Nice one 23 veiws already so some interest but no comments so far. The ceramic insulation I am sure is very good. I will try the block as i need to fill the case close to the pipes. I will keep you posted on progress. and any one else who may be interested. geoff.

Always interested Geoff and Steven. Although there are many views for teh subject of this thread it isn't always appropriate to leave a comment. I know that the level of engineering shown on here is astounding and i for one don't feel confident in replyiong to a subject that I know absolutely nothing about but do appreciate seeing other peoples ideas, work and progress.

Thanks for sharing these with us so far

cheers

Jim

[mjt60a]

same here, it's always interesting to see how these things are done - even though I'm unlikely/unable to build one myself 

[Talisman]

Yep have to agree it interests me to. Unfortunately I don't fully understand which is a real pity as i have a Roundhouse loco sitting in a box half built and i haven't a clue / to scared to do anything with it