Trevithick Dredger Engine- Supports
by John
These are the boiler supports for th Trevithick Dredger Engine, which need a little more finishing.
As you can see my CNC mill is working nicely. The slow feed rate is because the brass is just super glued to the mounting base and I did not want to risk it coming adrift.
The CNC milled parts. The brass is 7.5mm thick.
And this was cut out from the edge silver soldered brass bread slices.
And I have also been working on the 6″ vertical boiler. The brazing with silver solder is almost finished. I have been redoing some of the joins, and can now get the pressure up to 200psi. There are 101 soldered joins in the construction (so far), so I am not too upset that a few of them were not perfect and required a redo. SWMBO was wondering about the bills from the industrial gas supplier. I have used several fills of oxygen. Totally abandoned acetylene and using propane now. It delivers more heat (at a slightly lower temperature), and much less costly.
johnsmachines 
Hi John
Your boiler design looks great are the plans available to purchase I am building my first stationery engine a Stuart twin victoria and would like to build a boiler for it.
Regards
John Emery
jonspics2@gmail.com
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Hi John, I modified plans for a 5″ boiler, because I had some 6″ copper pipe. If you wish I can send you a pdf of the 6″ plans. The 5″ plans were published in “Model Engineer” about 30 years ago. I can get the exact reference if you wish. The 5″ would easily power your Twin Victoria. John
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Hi John
Yes I would like the modified plan a PDF would be great.
Cheers
John
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send me an address John and I will send the plan.
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Hi John
My address is
40 Hutchins Cres
Kings Langley
NSW 2147
cheers
John Emery
PS I am enjoying your journey with the boiler projects.
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John, I meant an email address.
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