SignalFailure
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- Jan 1, 2008
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I'm just getting round to adding a steam inlet/exhaust to my little twin oscillator and can't decide which way to go. As I wanted to make it possible to completely disassemble this engine (for no particular reason just to see if I could make it that way) I didn't really want to solder in copper pipes. I plan to take the exhaust steam 'out the back' of the port block(1/2" brass angle) via a longitudinal 1.5mm hole.
For steam-in, my my favourite option would be a brass 'tube' (actually some 4mm rod drilled with a 1.5mm hole so de-zinc'ing shouldn't be a problem) sunk about 1.5mm into the block in a flat bottomed hole and held in place purely by the force of the cross-stays in the base. This would match the stays in appearance/sort of symmetry but I wonder if it would be steam-tight (I suppose that depends on how closely I can machine it!)? The blue bit in the image below is the part I'm talking about - sorry if my CAD skills are unconventional!)
Alternatively I could solder on small threaded connectors for union nuts but I'd prefer the former option - does anyone have any thoughts on this please?
This thread...
http://www.homemodelenginemachinist.com/index.php?topic=1007.0
and this picture might help
TIA
Paul
For steam-in, my my favourite option would be a brass 'tube' (actually some 4mm rod drilled with a 1.5mm hole so de-zinc'ing shouldn't be a problem) sunk about 1.5mm into the block in a flat bottomed hole and held in place purely by the force of the cross-stays in the base. This would match the stays in appearance/sort of symmetry but I wonder if it would be steam-tight (I suppose that depends on how closely I can machine it!)? The blue bit in the image below is the part I'm talking about - sorry if my CAD skills are unconventional!)
Alternatively I could solder on small threaded connectors for union nuts but I'd prefer the former option - does anyone have any thoughts on this please?
This thread...
http://www.homemodelenginemachinist.com/index.php?topic=1007.0
and this picture might help
TIA
Paul