James Coombes Engine
1808 forum posts
Thanks for the kind words guy's.
To buy or build a boiler. That is the next question.?
I have done quite a bit of soft soldering over the years but the skill of silver soldering and the required equipment is something I possess neither of. - Is jumping in a the deep end of making a boiler a good place to start to learn this skill I am wondering.?
Any advice will be welcome.
Many thanks again, Nick
2314 forum posts
In my, albeit limited, experience silver soldering is not difficult. It requires scrupulous cleanliness in the joint areas and a reasonably close fit of the components to be soldered. Heat to get the component parts warm and a little extra heat applied to the cleaned and fluxed joints when applying the solder to get it to run. Sure, have a practice on some scrap copper sheet first and you will see how easy it is and will quickly gain confidence. Good fitting joints are needed - you don't want to try filling holes and gaps with silver solder and, just to reiterate, cleanliness is vital.
Apart from the method and amount of heat required I don't think it's much more difficult than soft soldering.
I do like the James Coombes and my current project of the " Trapezium Connecting Rod Engine" is similar in many respects - I may actually finish it one day !
Edited By NJH on 30/03/2015 18:03:53
Edited By NJH on 30/03/2015 18:08:44
1808 forum posts
Another thread had prompted me to make this post after all this time.
Although I have another project 'on-the-go' presently. (which I have neglected this last couple of months) I do think a 2 X scale of the James Coombes on the size of and perhaps using the cylinder etc. of the major beam would be a most impressive model.
Would require the fabrication of the base, flywheel and the cross head guides, but certainly 'do-able'.
Only issue for me would be that my lathe can only turn 10 1/2" so flywheel would be a problem without using my friends lathe.
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