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Suggestion of need for more photos of boiler underside

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Jeff Dayman06/06/2010 14:26:15
1896 forum posts
45 photos
I have been through the issues with Northumbrian articles and note that there are no photos of the throatplate area of the boiler or foundation ring. Some photos of the pre-assy boiler parts and the firebox/boiler bottom side would be helpful. 
bellerophon10/06/2010 20:46:36
24 forum posts
I'm hoping to make a start on the foundation ring either this weekend or in ten days' time - I'll try to photo and post them
I bought boiler kit of parts from GLR and although the articles' drawings refer to 1/4" sq copper they supplied 1/4 x 3/8 copper -    I'm going to file/mill down to 1/4 square as the 3/8 would go above the backplate bushes. 
ALSO if you're going to do the superheaters the GLR kit doesn't give the two 8" long x 3/8" tubes  -  fortunately I bought some last week so it's not a problem but the superheate
r tubes aren't shown on the ME drawings. I've realised you can't depend on the ME article drawings to build the engine you need a full set of plans from GLR .
As mine haven't arrived yet (only ordered them a couple of days ago) I don't know whether the original plans have the same errors as the articles
Donald campbell 
Chris11/06/2010 16:05:05
87 forum posts
13 photos
Keep the information and photos coming Donald. I've just ordered the set of parts for the boiler and hope to make a start soon. As this is my first attempt at a boiler I will need all the help I can get.
bellerophon11/06/2010 16:10:04
24 forum posts
Hate to say this but it's my first attempt as well!No time yet (work keeps getting in the way)
BTW the safety valve is OK I spoke to GLR this pm they apparently got a batch of 5/16 from their supplier but the pressure is the same so it just means threading the bush to 5/16 ME instead of 3/8 
bellerophon04/07/2010 09:08:09
24 forum posts
Hi everyone apologies for delay but I still have to work to pay for the parts!
Camera bust so had to use my phone I found that although the article says 1/4" square all round for foundation ring, probably due to me when I assembled the boiler it was more like 3/16 on the sides and 1/4 front and back. I made the side pieces 1/4" deep by 3/16 hence they look different sizes on the photos of the bottom, so there was minimal gap into which the solder had to run.
I'm a beginner as I believe Chris is - one thing I found when silver soldering this even with a large Sievert burner is that you have to insulate the boiler away from where you're trying to silver solder or it takes ages to reach working temperature - I used broken firebrick round the barrel and stood the boiler on firebrick and it seemed easier.
There isn't much to the base - I attach  some photos. Though not specifically mentioned I completed as much as I could of the firebox and soldered it up. I found fitting the top stays to the inside of the main  boiler tube accurately to be helped by putting in 4 x 1/16" rivets which helped to keep it all aligned whilst fitting the foundation ring. Also made sure the bottom of the firebox and the outer tube were flat  on surface pate when all assembled dry (linisher took out any minor unevenness)
Loads of flux on the parts after pickling in Citric Acid, then soldered it in with the backplate all at next firing. I'm then going to insert and solder the stays and throat tube and bushes at the next session note I'm building the superheated version hence the two larger holes at the throatplate).
Haven't included a specific photo of the  tube but     drilled a 1" hole in a block of hardwood, heated the 1" tube to anneal (be careful - too much heat and it'll melt - thanks to GLR for the free replacement) and flanged with a peen hammer.
All in all took a bit of time to get everything lined up but not nearly as bad as I had feared.

THIS APPEARS TO BE INCOMPATIBLE WITH THE SOFTWARE BEING USED ON THIS THREAD AS FAR AS IMPORTING IMAGES - IT WONT ACCEPT CUT & PASTE OR DRAG & DROP IMAGES; OS X DOESN'T HAVE an "album" i have tried pasting the url and it just doesn't show in the post and I tried creating an "album" folder and pointing it to that and it doesn't do that either!!
anyone who needs to see the pics (Chris??) email me directly on and I'll forward an email with the pics attached 

 Donald Campbell
Chris04/07/2010 11:57:33
87 forum posts
13 photos
Hi Donald,
Have sent an E Mail for the pictures.
Some time ago the praise worthy and knowledgable on this site told me to throw away my fire bricks and buy a Kaolin Wool blanket. It cost me about £8 from CuP Alloys and has almost certainly paid for it's self in gas savings. Brilliant when heating sheets of brass for anealing etc, they seem to be up to temp in no time at all. It reflect heat rather than absorbing it which is apparently the nature of fire bricks.

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