Gallery, Projects and General > Project Logs
Robinson Hot Air Engine.
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DavidA:
While most of my 'stuff' is in the big shed that is only heated up when needed, my 'machine shop' is heated constantly in this weather by a small electric greenhouse heater.  Keeps the place at around 12C. When the outside air temp gets back above freezing I will switch it back to four hours on-six hours off via the timer to save on fuel.
Really need to incorporate a room-stat in the circuitry to add a bit more control.

Dave.
shoey51:
I have the oposite problem I need to get Aircon installed to cool the workshop down
Stilldrillin:
Well, it's been quite a while......  ::)

What with weather, health, family, friends.......
Even the new lass in the inspection dept has caused problems! She's been off for a fortnight.
Spent a few nights in hospital, for chopping and stitching together. She's back to her young self now, though......  :D

Just, had to grab a few minutes, whenever I could.  :thumbup:

Mounted faceplate on the rotary table. Centre adaptor bush, and the displacer bush screwed to the wrong side of the casting......




This held the assembly central to the displacer housing bore.......




Milled through the 3mm steel cover plate......







Swapped cutters and opened out the bore, and machined the lower, and upper joint faces.
Gave the cover plate an extra 5 thou' per side, for easier assembly, when painted......




Finish turned the replacement section of the displacer cylinder. (That's not a false start, by the flange, it's the 5 thou' for paint)......




Fits quite snugly.......




Shows how the brass repair tube snugs up to the cylinder. Also, the plugged water hole......





Next job was the chimney........




Opened out carefully......




Eventually, to 18mm......





Then a bush, to adapt to a 15mm copper elbow.......




Looks ok, I think......







Next up, is the in/ out coolant pipes.

That's it. For now!

David D
sbwhart:
Cracking bit of machining Dave, looking real good

Hope your little inspector has made a full recovery and is doing well.

Stew

Dean W:
You made a good show of that, David.  Even I can understand it!  ; )
Looks very good, and the chimney is a smart addition.
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