Material list for Black 5 boiler

[runner42]

Has anyone established a material list for making DY 5' gauge Black 5 boiler that they would like to provide me these details? I am specifically interested in the copper sheet measurements so that I can have the supplier cut blanks to size because I don't have the capability to cut from a large 3mm thick sheet.


Brian 

[dscott]

I have a completed one sat waiting round the house and they are very big.
Useful in that the barrel can be measured and the firebox wrapper.
Then everyone can compare notes.

Best Regards.
David and Lily.

[Neale]

I have the Reeves boiler material kit sitting at the back of the workshop at the moment - like many of these things, it needs to "mature" before use... Actually, I bought it when they had a deal on and prices of copper will only go up.

If I can reach it (and lift it - it's a heavy bundle), I'll see if I can get some measurements off it. Because of the tapered boiler, it's all supplied flat for rolling, even the parallel section, from memory. No promises - see what I can do.

I've been concentrating on the tender to date - I thought that would be an easy way into the project. Shows how much I know!

[Neale]

Right, here goes... I've typically rounded down to the nearest 1/4" or so, as I'm not sure how much trimming allowance is given. If you added, say, 1/4" to each measurement you would have enough. It appears that the sheet material is cut to imperial dimensions but is metric thickness. I'm also assuming that Reeves have got it right, but I have no reason to suppose that they have not. Where the material is marked, I have labelled accordingly below.

7 off 8" x 1/4" ph.br. round
1 off 9" x 1/2" sq Cu
1 off 20 3/4" x 1/2" sq Cu
1 off 1 3/8" long x 1 5/8" dia x 1/8" wall Cu tube
1 off 7.5" x 1.5" x 1/4" Cu flat bar
4 off 15" x 1" x .0845" wall Cu tube
Bag (lots!) 25x3mm Cu rivets
4 off 26.5" x 1/4" dia bronze
1 off 27.5" x .185" OD x .088" ID Cu tube
21 off 15" x .4375" Cu tubes (did not measure wall thickness)

Following are all Cu sheet:

Barrel Front 18" x 6 1/4" x 2.5mm
FB door 6.5" x 5" x 3mm
Crownstay material 16" x 9.5" x 2.5mm
SB tubeplate 6.25" x 6.25" x 3mm
Butt strap 9.25" x 1.5" x 0.140"
Backhead 7.5" x 9" x 3mm
Throat 7" x 7" x 3mm
FB tube 5.75" x 7.75" x 3mm
Inner wrapper 20" x 11.25" x 2.5mm
Barrel taper 20" x 10.25" x 3mm

Outer wrapper 24" x 12" x 3mm

Then with your second mortgage, you can buy the silver solder...

One question mark in my mind after looking through this lot (I did a quick check against the packing list when it arrived but without a great deal of thought) is that I suspect that it is for a boiler to the DY design, with girder crown stays. Don't know what the Australian code says about these but as far as I know, they are allowed under the UK Southern Federation boiler code. However, my local club boiler inspector (who is the man I have to keep happy) does not like girder crown stays purely because they are so difficult to inspect from a silver solder penetration aspect. I might discuss how this could be changed to round stays when I get to that stage - but maybe someone else out there knows better or has already tackled this problem?

[runner42]

Hi Neale,

what a stirling response, you have put a lot of effort in providing those details for which I am very grateful. I hope one day to be able to return the favour. Yes the AMBSC code doesn't allow girder stays for the very reason that you quote, so that part of the design has been changed to provide round stays in place of the girder type. So as far as the 3 mm copper plate requirements that are needed, if your listing includes copper plate material for the girder stays, then I can reduce the listing by that amount. Also I have simplified the barrel construction to a single tapered type and not have the two parts, a tapered and a parallel. The reason is that DY copied full size and why this form of construction existed was that the designers wanted a standard boiler that could be easily modified to cover a range of locomotive sizes and the parallel section could be extended or shortened to suit the size requirements. The cleading is presented as if it is covering a single tapered barrel, so the outline of the locomotive is not changed.

The photo shows the parts that are subject to modification. The stay size and spacing are iaw the AMBSC code part 1 requirements so size is increased and spacing is also increased.

Brian

boiler drawing modified by Brian Leach, on Flickr

[Neale]

Given that it's taken me nearly three years and I'm probably about 90% through the tender, it will be a while until I start on a boiler! Any chance of a copy of your boiler drawing, though? It would be useful to have alongside the DY original. Whether I'll go the DY taper route or single taper I don't know yet but the single taper does look like a good idea. I can PM an email address if you're ok with that.

I haven't contributed to your main B5 thread as I don't want to clutter that with my ramblings but I'm following with interest. I've just reached the point where my tender body holds water - at least that one doesn't need pressure-testing!

- Brian (another one!)

[runner42]

Hi Brian,

yes I can provide a copy of the modified drawing, but the changes are depicted in the previous photo. If this is too small to make a print off I can e-mail you the changed drawing. E-mail me your address by PM. Or I can provide you with some photos of the exact boiler under construction.

Brian